datcomimport

Bring DATCOM file into MATLAB environment

Syntax

aero = datcomimport(file)

aero = datcomimport(file,usenan)

aero = datcomimport(file,usenan,verbose)

aero = datcomimport(file,usenan,verbose,filetype)

Description

aero = datcomimport(file) imports aerodynamic data from file into aero. Before reading the United States Air Force Digital DATCOM file, datcomimport initializes values to 99999 when there is not a full set of data for the DATCOM case.

example

aero = datcomimport(file,usenan) replaces data points with NaN or zero where no DATCOM methods exist or where the method is not applicable.

example

aero = datcomimport(file,usenan,verbose) displays the status of the DATCOM file being read in the MATLAB^® Command Window.

example

aero = datcomimport(file,usenan,verbose,filetype) imports a DATCOM of a particular USAF Digital DATCOM file type.

example

Examples

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Read Digital DATCOM Files

Open Live Script

These examples show how to read diginal DATACOM files.

Read 1976 Version of Digital DATCOM File

Read the 1976 version Digital DATCOM output file astdatcom.out.

aero = datcomimport('astdatcom.out')

aero = 1x1 cell array
    {1x1 struct}

Read USAF Digital DATCOM Output File Replacing Data Points with Zeroes

Read the 1976 Digital DATCOM output file astdatcom.out using zeros to replace data points where no DATCOM methods exist. Use usenanvar variable to set usenan argument to false.

usenanvar = false;
aero = datcomimport('astdatcom.out',usenanvar)

aero = 1x1 cell array
    {1x1 struct}

Read USAF Digital DATCOM Output File Replacing Data Points with Zeroes Specifying Verbose Settings

Read the 1976 Digital DATCOM output file astdatcom.out using zeros to replace data points where no DATCOM methods exist and displaying status information in the Command Window. Use usenanvar variable to set usenan argument to false.

usenanvar = false;
aero = datcomimport('astdatcom.out',usenanvar,1)

Loading file 'astdatcom.out'.
Reading input data from file 'astdatcom.out'.
Reading output data from file 'astdatcom.out'.

aero = 1x1 cell array
    {1x1 struct}

Read USAF Digital DATCOM Output File Replacing Data Points with Zeroes and Specifying Verbose Settings and DATCOM File Type

Read the 1976 Digital DATCOM output file astdatcom.out using NaNs to replace data points where no DATCOM methods exist, displaying status information in the Command Window, and specifying the DATCOM output file type. Use usenanvar variable to set usenan argument to true.

usenanvar = true;
aero = datcomimport('astdatcom.out',usenanvar,1,6)

Loading file 'astdatcom.out'.
Reading input data from file 'astdatcom.out'.
Reading output data from file 'astdatcom.out'.

aero = 1x1 cell array
    {1x1 struct}

Input Arguments

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`file` — DATCOM file
character vector | cell array of file names

Digital DATCOM output file name, specified as a character vector or cell array of file names. This file is generated from USAF Digital DATCOM files.

The datcomimport supports only these USAF Digital DATCOM files. You can rename the output files before importing them.

Output File from DATCOM	File Type Versions
`for006.dat` by all DATCOM versions	1976, 1999, 2007, 2008, 2011, and 2014
`for021.dat` by DATCOM 2007, DATCOM 2008, DATCOM 2011, and DATCOM 2014	2007, 2008, 2011, and 2014
`for042.csv` by DATCOM 2008, DATCOM 2011, and DATCOM 2014	2008, 2011, and 2014

Example: for006.dat

Dependencies

The datcomimport function accepts DATCOM files of the type specified by the filetype argument. By default, the file type is 6 ( for006.dat, output by all DATCOM versions).

Data Types: char | string

`usenan` — Replace data points
`true` (default) | `false`

While importing the DATCOM file, replace data points with NaNs (true) or zeroes (false) where no DATCOM methods exist or where methods are not applicable.

Data Types: char | string

`verbose` — Read status
`2` (default) | `0` | `1`

Read status of import of DATCOM file, specified as:

0 — No status information.
1 — Display a status information as a progress bar.
2 — Display status information in the MATLAB Command Window.

Data Types: double

`filetype` — DATCOM file type
`6` (default) | `2142`

DATCOM file type, specified as 6, 21, or 42.

Depending on the file type, the datcomimport function expects the imported DATCOM files to contain the fields listed in the Expected Fields column.

`filetype`	Output File from DATCOM	File Type Versions	Expected Fields
`6`	`for006.dat` by all DATCOM versions	1976, 1999, 2007, 2008, 2011, and 2014	Fields for 1976 Version (File Type 6) Fields for 1999 Version (File Type 6) Fields for 2007, 2008, 2011, and 2014 Versions (File Type 6)
`21`	`for021.dat` by DATCOM 2007, DATCOM 2008, DATCOM 2011, and DATCOM 2014	2007, 2008, 2011, and 2014	Fields for 2007, 2008, 2011, and 2014 Versions (File Type 21)
`42`	`for042.csv` by DATCOM 2008, DATCOM 2011, and DATCOM 2014	2008, 2011, and 2014	Fields for 2008, 2011, and 2014 Version (File Type 42)

Note

If filetype is 21, the function collates the breakpoints and data from all the cases and appends them as the last entry of aero.

Data Types: double

Output Arguments

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`aero` — DATCOM structures
cell array of structures

DATCOM structures, returned as a cell array of structures.

Limitations

The operational limitations of the 1976 version DATCOM apply to the data contained in AERO. For more information on DATCOM limitations, see References, section 2.4.5.
USAF Digital DATCOM data for wing section, horizontal tail section, vertical tail section, and ventral fin section are not read.

More About

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Fields for 1976 Version (File Type 6)

1976 version of file type 6 DATCOM files must contain these fields.

Common Fields for the 1976 Version (File Type 6)

Field	Description	Default
`case`	Character vector containing the case ID.	`[]`
`mach`	Array of Mach numbers.	`[]`
`alt`	Array of altitudes.	`[]`
`alpha`	Array of angles of attack.	`[]`
`nmach`	Number of Mach numbers.	`0`
`nalt`	Number of altitudes.	`0`
`nalpha`	Number of angles of attack.	`0`
`rnnub`	Array of Reynolds numbers.	`[]`
`hypers`	Logical denoting, when `true`, that `mach` numbers above `tsmach` are hypersonic. Default values are supersonic.	`false`
`loop`	Scalar denoting the type of looping done to generate the DATCOM file. When `loop` is `1`, `mach` and `alt` are varied together. When `loop` is `2`, `mach` varies while `alt` is fixed. Altitude is then updated and Mach numbers are cycled through again. When `loop` is `3`, `mach` is fixed while `alt` varies. `mach` is then updated and altitudes are cycled through again.	`1`
`sref`	Scalar denoting the reference area for the case.	`[]`
`cbar`	Scalar denoting the longitudinal reference length.	`[]`
`blref`	Scalar denoting the lateral reference length.	`[]`
`dim`	Character vector denoting the specified system of units for the case.	`'ft'`
`deriv`	Character vector denoting the specified angle units for the case.	`'deg'`
`stmach`	Scalar value setting the upper limit of subsonic Mach numbers.	`0.6`
`tsmach`	Scalar value setting the lower limit of supersonic Mach numbers.	`1.4`
`save`	Logical denoting whether the input values for this case are used in the next case.	`false`
`stype`	Scalar denoting the type of asymmetric flap for the case.	`[]`
`trim`	Logical denoting the reading of trim data for the case. When trim runs are read, this value is set to `true`.	`false`
`damp`	Logical denoting the reading of dynamic derivative data for the case. When dynamic derivative runs are read, this value is set to `true`.	`false`
`build`	Scalar denoting the reading of build data for the case. When build runs are read, this value is set to 10.	`1`
`part`	Logical denoting the reading of partial data for the case. When partial runs are written for each Mach number, this value is set to `true`.	`false`
`highsym`	Logical denoting the reading of symmetric flap high-lift data for the case. When symmetric flap runs are read, this value is set to `true`.	`false`
`highasy`	Logical denoting the reading of asymmetric flap high-lift data for the case. When asymmetric flap runs are read, this value is set to `true`.	`false`
`highcon`	Logical denoting the reading of control/trim tab high-lift data for the case. When control/trim tab runs are read, this value is set to `true`.	`false`
`tjet`	Logical denoting the reading of transverse-jet control data for the case. When transverse-jet control runs are read, this value is set to `true`.	`false`
`hypeff`	Logical denoting the reading of hypersonic flap effectiveness data for the case. When hypersonic flap effectiveness runs are read, this value is set to `true`.	`false`
`lb`	Logical denoting the reading of low aspect ratio wing or lifting body data for the case. When low aspect ratio wing or lifting body runs are read, this value is set to `true`.	`false`
`pwr`	Logical denoting the reading of power effects data for the case. When power effects runs are read, this value is set to `true`.	`false`
`grnd`	Logical denoting the reading of ground effects data for the case. When ground effects runs are read, this value is set to `true`.	`false`
`wsspn`	Scalar denoting the semi-span theoretical panel for wing. This value is used to determine if the configuration contains a canard.	`1`
`hsspn`	Scalar denoting the semi-span theoretical panel for horizontal tail. This value is used to determine if the configuration contains a canard.	`1`
`ndelta`	Number of control surface deflections: `delta`, `deltal`, or `deltar`.	`0`
`delta`	Array of control-surface streamwise deflection angles.	`[]`
`deltal`	Array of left lifting surface streamwise control deflection angles, which are defined positive for trailing-edge down.	`[]`
`deltar`	Array of right lifting surface streamwise control deflection angles, which are defined positive for trailing-edge down.	`[]`
`ngh`	Scalar denoting the number of ground altitudes.	`0`
`grndht`	Array of ground heights.	`[]`
`config`	Structure of logicals denoting whether the case contains horizontal tails.	`false`, as follows. config.downwash = false; config.body = false; config.wing = false; config.htail = false; config.vtail = false; config.vfin = false;
`version`	Version of DATCOM file.	`1976`

Static Longitude and Lateral Stability Fields Available for the 1976 Version (File Type 6)

Field	Matrix of...	Function of...
`cd`	Drag coefficients, which are defined positive for an aft-acting load.	`alpha`, `mach`, `alt`, `build`, `grndht`, `delta`
`cl`	Lift coefficients, which are defined positive for an up-acting load.	`alpha`, `mach`, `alt`, `build`, `grndht`, `delta`
`cm`	Pitching-moment coefficients, which are defined positive for a nose-up rotation.	`alpha`, `mach`, `alt`, `build`, `grndht`, `delta`
`cn`	Normal-force coefficients, which are defined positive for a normal force in the +Z direction.	`alpha`, `mach`, `alt`, `build`, `grndht`, `delta`
`ca`	Axial-force coefficients, which are defined positive for a normal force in the +X direction.	`alpha`, `mach`, `alt`, `build`, `grndht`, `delta`
`xcp`	Distances between moment reference center and the center of pressure divided by the longitudinal reference length. Distances are defined positive for a location forward of the center of gravity.	`alpha`, `mach`, `alt`, `build`, `grndht`, `delta`
`cla`	Derivatives of lift coefficients relative to `alpha`.	`alpha`, `mach`, `alt`, `build`, `grndht`, `delta`
`cma`	Derivatives of pitching-moment coefficients relative to `alpha`.	`alpha`, `mach`, `alt`, `build`, `grndht`, `delta`
`cyb`	Derivatives of side-force coefficients relative to sideslip angle.	`alpha`, `mach`, `alt`, `build`, `grndht`, `delta`
`cnb`	Derivatives of yawing-moment coefficients relative to sideslip angle.	`alpha`, `mach`, `alt`, `build`, `grndht`, `delta`
`clb`	Derivatives of rolling-moment coefficients relative to sideslip angle.	`alpha`, `mach`, `alt`, `build`, `grndht`, `delta`
`qqinf`	Ratios of dynamic pressure at the horizontal tail to the freestream value.	`alpha`, `mach`, `alt`, `build`, `grndht`, `delta`
`eps`	Downwash angle at horizontal tail in degrees.	`alpha`, `mach`, `alt`, `build`, `grndht`, `delta`
`depsdalp`	Downwash angle relative to angle of attack.	`alpha`, `mach`, `alt`, `build`, `grndht`, `delta`

Dynamic Derivative Fields for the 1976 Version (File Type 6)

Field	Matrix of...	Function of...
`clq`	Lift force derivatives due to pitch rate.	`alpha`, `mach`, `alt`, `build`
`cmq`	Pitching-moment derivatives due to pitch rate.	`alpha`, `mach`, `alt`, `build`
`clad`	Lift-force derivatives due to rate of angle of attack.	`alpha`, `mach`, `alt`, `build`
`cmad`	Pitching-moment derivatives due to rate of angle of attack.	`alpha`, `mach`, `alt`, `build`
`clp`	Rolling-moment derivatives due to roll rate.	`alpha`, `mach`, `alt`, `build`
`cyp`	Lateral-force derivatives due to roll rate.	`alpha`, `mach`, `alt`, `build`
`cnp`	Yawing-moment derivatives due to roll rate.	`alpha`, `mach`, `alt`, `build`
`cnr`	Yawing-moment derivatives due to yaw rate.	`alpha`, `mach`, `alt`, `build`
`clr`	Rolling-moment derivatives due to yaw rate.	`alpha`, `mach`, `alt`, `build`

High-Lift and Control Fields for Symmetric Flaps for the 1976 Version (File Type 6)

Field	Matrix of...	Function of...
`dcl_sym`	Incremental lift coefficients due to deflection of control surface, valid in the linear-lift angle of attack range.	`delta`, `mach`, `alt`
`dcm_sym`	Incremental pitching-moment coefficients due to deflection of control surface, valid in the linear-lift angle of attack range.	`delta`, `mach`, `alt`
`dclmax_sym`	Incremental maximum lift coefficients.	`delta`, `mach`, `alt`
`dcdmin_sym`	Incremental minimum drag coefficients due to control or flap deflection.	`delta`, `mach`, `alt`
`clad_sym`	Lift-curve slope of the deflected, translated surface.	`delta`, `mach`, `alt`
`cha_sym`	Control-surface hinge-moment derivatives due to angle of attack. These derivatives, when defined positive, tend to rotate the flap trailing edge down.	`delta`, `mach`, `alt`
`chd_sym`	Control-surface hinge-moment derivatives due to control deflection. When defined positive, these derivatives tend to rotate the flap trailing edge down.	`delta`, `mach`, `alt`
`dcdi_sym`	Incremental induced drag coefficients due to flap detection.	`alpha`, `delta`, `mach`, `alt`

High-Lift and Control Fields Available for Asymmetric Flaps for the 1976 Version (File Type 6)

Field	Matrix of...	Function of...
`xsc`	Streamwise distances from wing leading edge to spoiler tip.	`delta`, `mach`, `alt`
`hsc`	Projected height of spoiler measured from normal to airfoil meanline.	`delta`, `mach`, `alt`
`ddc`	Projected height of deflector for spoiler-slot-deflector control.	`delta`, `mach`, `alt`
`dsc`	Projected height of spoiler control.	`delta`, `mach`, `alt`
`clroll`	Incremental rolling-moment coefficients due to asymmetrical deflection of control surface. The coefficients are defined positive when right wing is down.	`delta`, `mach`, and `alt`, or `alpha`, `delta`, `mach`, and `alt` for differential horizontal stabilizer
`cn_asy`	Incremental yawing-moment coefficients due to asymmetrical deflection of control surface. The coefficients are defined positive when nose is right.	`delta`, `mach`, and `alt`, or `alpha`, `delta`, `mach`, and `alt` for plain flaps

High-Lift and Control Fields Available for Control/Trim Tabs for the 1976 Version (File Type 6)

Field	Matrix of...	Function of...
`fc_con`	Stick forces or stick force coefficients.	`alpha`, `delta`, `mach`, `alt`
`fhmcoeff_free`	Flap-hinge moment coefficients tab free.	`alpha`, `delta`, `mach`, `alt`
`fhmcoeff_lock`	Flap-hinge moment coefficients tab locked.	`alpha`, `delta`, `mach`, `alt`
`fhmcoeff_gear`	Flap-hinge moment coefficients due to gearing.	`alpha`, `delta`, `mach`, `alt`
`ttab_def`	Trim-tab deflections for zero stick force.	`alpha`, `delta`, `mach`, `alt`

High-Lift and Control Fields Available for Trim for the 1976 Version (File Type 6)

Field	Matrix of...	Function of...
`cl_utrim`	Untrimmed lift coefficients, which are defined positive for an up-acting load.	`alpha`, `mach`, `alt`
`cd_utrim`	Untrimmed drag coefficients, which are defined positive for an aft-acting load.	`alpha`, `mach`, `alt`
`cm_utrim`	Untrimmed pitching-moment coefficients, which are defined positive for a nose-up rotation.	`alpha`, `mach`, `alt`
`delt_trim`	Trimmed control-surface streamwise deflection angles.	`alpha`, `mach`, `alt`
`dcl_trim`	Trimmed incremental lift coefficients in the linear-lift angle of attack range due to deflection of control surface.	`alpha`, `mach`, `alt`
`dclmax_trim`	Trimmed incremental maximum lift coefficients.	`alpha`, `mach`, `alt`
`dcdi_trim`	Trimmed incremental induced drag coefficients due to flap deflection.	`alpha`, `mach`, `alt`
`dcdmin_trim`	Trimmed incremental minimum drag coefficients due to control or flap deflection.	`alpha`, `mach`, `alt`
`cha_trim`	Trimmed control-surface hinge-moment derivatives due to angle of attack.	`alpha`, `mach`, `alt`
`chd_trim`	Trimmed control-surface hinge-moment derivatives due to control deflection.	`alpha`, `mach`, `alt`
`cl_tailutrim`	Untrimmed stabilizer lift coefficients, which are defined positive for an up-acting load.	`alpha`, `mach`, `alt`
`cd_tailutrim`	Untrimmed stabilizer drag coefficients, which are defined positive for an aft-acting load.	`alpha`, `mach`, `alt`
`cm_tailutrim`	Untrimmed stabilizer pitching-moment coefficients, which are defined positive for a nose-up rotation.	`alpha`, `mach`, `alt`
`hm_tailutrim`	Untrimmed stabilizer hinge-moment coefficients, which are defined positive for a stabilizer rotation with leading edge up and trailing edge down.	`alpha`, `mach`, `alt`
`aliht_tailtrim`	Stabilizer incidence required to trim.	`alpha`, `mach`, `alt`
`cl_tailtrim`	Trimmed stabilizer lift coefficients, which are defined positive for an up-acting load.	`alpha`, `mach`, `alt`
`cd_tailtrim`	Trimmed stabilizer drag coefficients, which are defined positive for an aft-acting load.	`alpha`, `mach`, `alt`
`cm_tailtrim`	Trimmed stabilizer pitching-moment coefficients, which are defined positive for a nose-up rotation.	`alpha`, `mach`, `alt`
`hm_tailtrim`	Trimmed stabilizer hinge-moment coefficients, which are defined positive for a stabilizer rotation with leading edge up and trailing edge down.	`alpha`, `mach`, `alt`
`cl_trimi`	Lift coefficients at trim incidence. These coefficients are defined positive for an up-acting load.	`alpha`, `mach`, `alt`
`cd_trimi`	Drag coefficients at trim incidence. These coefficients are defined positive for an aft-acting load.	`alpha`, `mach`, `alt`

Transverse Jet Control Fields for the 1976 Version (File Type 6)

Field	Description	Stored with Indices of...
`time`	Matrix of times.	`mach`, `alt`, `alpha`
`ctrlfrc`	Matrix of control forces.	`mach`, `alt`, `alpha`
`locmach`	Matrix of local Mach numbers.	`mach`, `alt`, `alpha`
`reynum`	Matrix of Reynolds numbers.	`mach`, `alt`, `alpha`
`locpres`	Matrix of local pressures.	`mach`, `alt`, `alpha`
`dynpres`	Matrix of dynamic pressures.	`mach`, `alt`, `alpha`
`blayer`	Cell array of character vectors containing the state of the boundary layer.	`mach`, `alt`, `alpha`
`ctrlcoeff`	Matrix of control force coefficients.	`mach`, `alt`, `alpha`
`corrcoeff`	Matrix of corrected force coefficients.	`mach`, `alt`, `alpha`
`sonicamp`	Matrix of sonic amplification factors.	`mach`, `alt`, `alpha`
`ampfact`	Matrix of amplification factors.	`mach`, `alt`, `alpha`
`vacthr`	Matrix of vacuum thrusts.	`mach`, `alt`, `alpha`
`minpres`	Matrix of minimum pressure ratios.	`mach`, `alt`, `alpha`
`minjet`	Matrix of minimum jet pressures.	`mach`, `alt`, `alpha`
`jetpres`	Matrix of jet pressures.	`mach`, `alt`, `alpha`
`massflow`	Matrix of mass flow rates.	`mach`, `alt`, `alpha`
`propelwt`	Matrix of propellant weights.	`mach`, `alt`, `alpha`

Hypersonic Fields for the 1976 Version (File Type 6)

Field	Matrix of...	Stored with Indices of...
`df_normal`	Increments in normal force per spanwise foot of control.	`alpha`, `delta`, `mach`
`df_axial`	Increments in axial force per spanwise foot of control.	`alpha`, `delta`, `mach`
`cm_normal`	Increments in pitching moment due to normal force per spanwise foot of control.	`alpha`, `delta`, `mach`
`cm_axial`	Increments in pitching moment due to axial force per spanwise foot of control.	`alpha`, `delta`, `mach`
`cp_normal`	Center of pressure locations of normal force.	`alpha`, `delta`, `mach`
`cp_axial`	Center of pressure locations of axial force.	`alpha`, `delta`, `mach`

Auxiliary and Partial Fields Available for the 1976 Version (File Type 6)

Field	Matrix of...	Stored with Indices of...
`wetarea_b`	Body wetted area.	`mach`, `alt`, number of runs
`xcg_b`	Longitudinal locations of the center of gravity.	`mach`, `alt`, number of runs (normally 1, 2 for `hypers = true`)
`zcg_b`	Vertical locations of the center of gravity.	`mach`, `alt`, number of runs (normally 1, 2 for `hypers = true`)
`basearea_b`	Body base area.	`mach`, `alt`, number of runs (normally 1, 2 for `hypers = true`)
`cd0_b`	Body zero lift drags.	`mach`, `alt`, number of runs (normally 1, 2 for `hypers = true`)
`basedrag_b`	Body base drags.	`mach`, `alt`, number of runs (normally 1, 2 for `hypers = true`)
`fricdrag_b`	Body friction drags.	`mach`, `alt`, number of runs (normally 1, 2 for `hypers = true`)
`presdrag_b`	Body pressure drags.	`mach`, `alt`, number of runs (normally 1, 2 for `hypers = true`)
`lemac`	Leading edge mean aerodynamic chords.	`mach`, `alt`
`sidewash`	`sidewash`	`mach`, `alt`
`hiv_b_w`	`iv-b(w)`	`alpha`, `mach`, `alt`
`hiv_w_h`	`iv-w(h)`	`alpha`, `mach`, `alt`
`hiv_b_h`	`iv-b(h)`	`alpha`, `mach`, `alt`
`gamma`	`gamma2pialphav*r`	`alpha`, `mach`, `alt`
`gamma2pialpvr`	`gamma(2pialphav*r)t`	`alpha`, `mach`, `alt`
`clpgammacl0`	`clp(gamma=cl=0)`	`mach`, `alt`
`clpgammaclp`	`clp(gamma)/cl (gamma=0)`	`mach`, `alt`
`cnptheta`	`cnp/theta`	`mach`, `alt`
`cypgamma`	`cyp/gamma`	`mach`, `alt`
`cypcl`	`cyp/cl (cl=0)`	`mach`, `alt`
`clbgamma`	`clb/gamma`	`mach`, `alt`
`cmothetaw`	`(cmo/theta)w`	`mach`, `alt`
`cmothetah`	`(cmo/theta)h`	`mach`, `alt`
`espeff`	`(epsoln)eff`	`alpha`, `mach`, and `alt`
`despdalpeff`	`d(epsoln)/d(alpha) eff`	`alpha`, `mach`, `alt`
`dragdiv`	`drag divergence mach number`	`mach`, `alt`
`cd0mach`	Four Mach numbers for the zero lift drag.	`index`, `mach`, `alt`
`cd0`	Four zero lift drags.	`index`, `mach`, `alt`
`clbclmfb_****`	`(clb/cl)mfb`, where `****` is either `wb` (wing-body) or `bht` (body-horizontal tail).	`mach`, `alt`.
`cnam14_****`	`(cna)m=1.4`, where `****` is either `wb` (wing-body) or `bht` (body-horizontal tail).	`mach`,`alt`
`area__*`	Areas, where `` is either `w` (wing), `ht` (horizontal tail), `vt` (vertical tail), or `vf` (ventral fin) and `*` is either `tt` (total theoretical), `ti` (theoretical inboard), `te` (total exposed), `ei` (exposed inboard), or `o` (outboard).	`mach`, `alt`, number of runs (normally 1, 2 for `hypers = true`)
`taperratio__*`	Taper ratios, where `` is either `w` (wing), `ht` (horizontal tail), `vt` (vertical tail), or `vf` (ventral fin) and `*` is either `tt` (total theoretical), `ti` (theoretical inboard), `te` (total exposed), `ei` (exposed inboard), or `o` (outboard).	`mach`, `alt`, number of runs (normally 1, 2 for `hypers = true`)
`aspectratio__*`	Aspect ratios, where `` is either `w` (wing), `ht` (horizontal tail), `vt` (vertical tail), or `vf` (ventral fin) and `*` is either `tt` (total theoretical), `ti` (theoretical inboard), `te` (total exposed), `ei` (exposed inboard), or `o` (outboard).	`mach`, `alt`, number of runs (normally 1, 2 for `hypers = true`)
`qcsweep__*`	Quarter chord sweeps, where `` is either `w` (wing), `ht` (horizontal tail), `vt` (vertical tail), or `vf` (ventral fin) and `*` is either `tt` (total theoretical), `ti` (theoretical inboard), `te` (total exposed), `ei` (exposed inboard), or `o` (outboard).	`mach`, `alt`, number of runs (normally 1, 2 for `hypers = true`)
`mac__*`	Mean aerodynamic chords, where `` is either `w` (wing), `ht` (horizontal tail), `vt` (vertical tail), or `vf` (ventral fin) and `*` is either `tt` (total theoretical), `ti` (theoretical inboard), `te` (total exposed), `ei` (exposed inboard), or `o` (outboard).	`mach`, `alt`, number of runs (normally 1, 2 for `hypers = true`)
`qcmac__*`	Quarter chord `x(mac)`, where `` is either `w` (wing), `ht` (horizontal tail), `vt` (vertical tail), or `vf` (ventral fin) and `*` is either `tt` (total theoretical), `ti` (theoretical inboard), `te` (total exposed), `ei` (exposed inboard), or `o` (outboard).	`mach`, `alt`, number of runs (normally 1, 2 for `hypers = true`)
`ymac__*`	`y(mac)`, where `` is either `w` (wing), `ht` (horizontal tail), `vt` (vertical tail), or `vf` (ventral fin) and `*` is either `tt` (total theoretical), `ti` (theoretical inboard), `te` (total exposed), `ei` (exposed inboard), or `o` (outboard).	`mach`, `alt`, number of runs (normally 1, 2 for `hypers = true`)
`cd0__*`	Zero lift drags, where `` is either `w` (wing), `ht` (horizontal tail), `vt` (vertical tail), or `vf` (ventral fin) and `*` is either `tt` (total theoretical), `ti` (theoretical inboard), `te` (total exposed), `ei` (exposed inboard), or `o` (outboard).	`mach`, `alt`, number of runs (normally 1, 2 for `hypers = true`)
`friccoeff__*`	Friction coefficients, where `` is either `w` (wing), `ht` (horizontal tail), `vt` (vertical tail), or `vf` (ventral fin) and `*` is either `tt` (total theoretical), `ti` (theoretical inboard), `te` (total exposed), `ei` (exposed inboard), or `o` (outboard).	`mach`, `alt`, number of runs (normally 1, 2 for `hypers = true`)
`cla_b_***`	`cla-b(*)`, where `*` is either `w` (wing) or `ht` (stabilizer).	`mach`, `alt`, number of runs (normally 1, 2 for `hypers = true`)
`cla_***_b`	`cla-*(b)`, where `*` is either `w` (wing) or `ht` (stabilizer).	`mach`, `alt`, number of runs (normally 1, 2 for `hypers = true`)
`k_b_***`	`k-b(*)`, where `*` is either `w` (wing) or `ht` (stabilizer).	`mach`, `alt`, number of runs (normally 1, 2 for `hypers = true`)
`k_***_b`	`k-*(b)`, where `*` is either `w` (wing) or `ht` (stabilizer).	`mach`, `alt`, number of runs (normally 1, 2 for `hypers = true`)
`xacc_b_***`	`xac/c-b(*)`, where `*` is either `w` (wing) or `ht` (stabilizer).	`mach`, `alt`, number of runs (normally 1, 2 for `hypers = true`)
`cdlcl2_***`	`cdl/cl^2`, where `***` is either `w` (wing) or `ht` (stabilizer).	`mach`, `alt`
`clbcl_***`	`clb/cl`, where `***` is either `w` (wing) or `ht` (stabilizer).	`mach`, `alt`
`fmach0_***`	Force break Mach numbers with zero sweep, where `***` is either `w` (wing) or `ht` (stabilizer).	`mach`, `alt`
`fmach_***`	Force break Mach numbers with sweep, where `***` is either `w` (wing) or `ht` (stabilizer).	`mach`, `alt`
`macha_***`	`mach(a)`, where `***` is either `w` (wing) or `ht` (stabilizer).	`mach`, `alt`
`machb_***`	`mach(b)`, where `***` is either `w` (wing) or `ht` (stabilizer).	`mach`, `alt`
`claa_***`	`cla(a)`, where `***` is either `w` (wing) or `ht` (stabilizer).	`mach`, `alt`
`clab_***`	`cla(b)`, where `***` is either `w` (wing) or `ht` (stabilizer).	`mach`, `alt`
`clbm06_***`	`(clb/cl)m=0.6`, where `***` is either `w` (wing) or `ht` (stabilizer).	`mach`, `alt`
`clbm14_***`	`(clb/cl)m=1.4`, where `***` is either `w` (wing) or `ht` (stabilizer).	`mach`, `alt`
`clalpmach_***`	Five Mach numbers for the lift curve slope, where `***` is either `w` (wing) or `ht` (stabilizer).	`index`, `mach`, `alt`
`clalp_***`	Five lift-curve slope values, where `***` is either `w` (wing) or `ht` (stabilizer).	`index`, `mach`, `alt`

Fields for 1999 Version (File Type 6)

1999 version of file type 6 DATCOM files must contain these fields.

Common Fields for the 1999 Version (File Type 6)

Field	Description	Default
`case`	Character vector containing the case ID.	`[]`
`mach`	Array of Mach numbers.	`[]`
`alt`	Array of altitudes.	`[]`
`alpha`	Array of angles of attack.	`[]`
`nmach`	Number of Mach numbers.	`0`
`nalt`	Number of altitudes.	`1`
`nalpha`	Number of angles of attack.	`0`
`rnnub`	Array of Reynolds numbers.	`[]`
`beta`	Scalar containing sideslip angle.	`0`
`phi`	Scalar containing aerodynamic roll angle.	`0`
`loop`	Scalar denoting the type of looping performed to generate the DATCOM file. When `loop` is `1`, `mach` and `alt` are varied together. The only loop option for the 1999 version of DATCOM is `loop` is equal to `1`.	`1`
`sref`	Scalar denoting the reference area for the case.	`[]`
`cbar`	Scalar denoting the longitudinal reference length.	`[]`
`blref`	Scalar denoting the lateral reference length.	`[]`
`dim`	Character vector denoting the specified system of units for the case.	`'ft'`
`deriv`	Character vector denoting the specified angle units for the case.	`'deg'`
`save`	Logical denoting whether the input values for this case are used in the next case.	`false`
`stype`	Scalar denoting the type of asymmetric flap for the case.	`[]`
`trim`	Logical denoting the reading of trim data for the case. When trim runs are read, this value is set to `true`.	`false`
`damp`	Logical denoting the reading of dynamic derivative data for the case. When dynamic derivative runs are read, this value is set to `true`.	`false`
`build`	Scalar denoting the reading of build data for the case. When build runs are read, this value is set to the number of build runs depending on the vehicle configuration.	`1`
`part`	Logical denoting the reading of partial data for the case. When partial runs are written for each Mach number, this value is set to `true`.	`false`
`hypeff`	Logical denoting the reading of hypersonic data for the case. When hypersonic data is read, this value is set to `true`.	`false`
`ngh`	Scalar denoting the number of ground altitudes.	`0`
`nolat`	Logical denoting the calculation of the lateral-direction derivatives is inhibited.	`false`
`config`	Structure of logicals and structures detailing the case configuration and fin deflections.	config.body = false config.fin1.avail = false; config.fin1.npanel = []; config.fin1.delta = []; config.fin2.avail = false; config.fin2.npanel = []; config.fin2.delta = []; config.fin3.avail = false; config.fin3.npanel = []; config.fin3.delta = []; config.fin4.avail = false; config.fin4.npanel = []; config.fin4.delta = [];
`version`	Version of DATCOM file.	`1999`

Static Longitude and Lateral Stability Fields Available for the 1999 Version (File Type 6)

Field	Matrix of...	Function of...
`cd`	Drag coefficients, which are defined positive for an aft-acting load.	`alpha`, `mach`, `alt`, `build`
`cl`	Lift coefficients, which are defined positive for an up-acting load.	`alpha`, `mach`, `alt`, `build`
`cm`	Pitching-moment coefficients, which are defined positive for a nose-up rotation.	`alpha`, `machalt`, `build`
`cn`	Normal-force coefficients, which are defined positive for a normal force in the +Z direction.	`alpha`, `mach`, `alt`, `build`
`ca`	Axial-force coefficients, which are defined positive for a normal force in the +X direction.	`alpha`, `mach`, `alt`, `build`
`xcp`	Distances between moment reference center and the center of pressure divided by the longitudinal reference length. These distances are defined positive for a location forward of the center of gravity.	`alpha`, `mach`, `alt`, `build`
`cna`	Derivatives of normal-force coefficients relative to `alpha`.	`alpha`, `mach`, `alt`, `build`
`cma`	Derivatives of pitching-moment coefficients relative to `alpha`.	`alpha`, `mach`, `alt`, `build`
`cyb`	Derivatives of side-force coefficients relative to sideslip angle.	`alpha`, `mach`, `alt`, `build`
`cnb`	Derivatives of yawing-moment coefficients relative to sideslip angle.	`alpha`, `mach`, `alt`, `build`
`clb`	Derivatives of rolling-moment coefficients relative to sideslip angle.	`alpha`, `mach`, `alt`, `build`
`clod`	Ratios of lift coefficient to drag coefficient.	`alpha`, `mach`, `alt`, `build`
`cy`	Side-force coefficients.	`alpha`, `mach`, `alt`, `build`
`cln`	Yawing-moment coefficient in body-axis.	`alpha`, `mach`, `alt`, `build`
`cll`	Rolling-moment coefficient in body-axis.	`alpha`, `mach`, `alt`, `build`

Dynamic Derivative Fields for the 1999 Version (File Type 6)

Field	Matrix of...	Function of...
`cnq`	Normal-force derivatives due to pitch rate.	`alpha`, `mach`, `alt`, `build`
`cmq`	Pitching-moment derivatives due to pitch rate.	`alpha`, `mach`, `alt`, `build`
`caq`	Axial-force derivatives due to pitch rate.	`alpha`, `mach`, `alt`, `build`
`cnad`	Normal-force derivatives due to rate of angle of attack.	`alpha`, `mach`, `alt`, `build`
`cmad`	Pitching-moment derivatives due to rate of angle of attack.	`alpha`, `mach`, `alt`, `build`
`clp`	Rolling-moment derivatives due to roll rate.	`alpha`, `mach`, `alt`, `build`
`cyp`	Lateral force derivatives due to roll rate.	`alpha`, `mach`, `alt`, `build`
`cnp`	Yawing-moment derivatives due to roll rate.	`alpha`, `mach`, `alt`, `build`
`cnr`	Yawing-moment derivatives due to yaw rate.	`alpha`, `mach`, `alt`, `build`
`clr`	Rolling-moment derivatives due to yaw rate.	`alpha`, `mach`, `alt`, `build`
`cyr`	Side force derivatives due to yaw rate.	`alpha`, `mach`, `alt`, `build`

Fields for 2007, 2008, 2011, and 2014 Versions (File Type 6)

2007, 2008, 2011, and 2014 versions of file type 6 DATCOM files must contain these fields.

Common Fields for the 2007, 2008, 2011, and 2014 Versions (File Type 6)

Field	Description	Default
`case`	Character vector containing the case ID.	`[]`
`mach`	Array of Mach numbers.	`[]`
`alt`	Array of altitudes.	`[]`
`alpha`	Array of angles of attack.	`[]`
`nmach`	Number of Mach numbers.	`0`
`nalt`	Number of altitudes.	`1`
`nalpha`	Number of angles of attack.	`0`
`rnnub`	Array of Reynolds numbers.	`[]`
`beta`	Scalar containing sideslip angle. Note This value does not appear correctly for the 2014 version. It always displays 0.	`0`
`phi`	Scalar containing aerodynamic roll angle.	`0`
`loop`	Scalar denoting the type of looping performed to generate the DATCOM file. When `loop` is `1`, `mach` and `alt` are varied together. The only loop option for the 2007 version of DATCOM is `loop`, equal to `1`.	`1`
`sref`	Scalar denoting the reference area for the case.	`[]`
`cbar`	Scalar denoting the longitudinal reference length.	`[]`
`blref`	Scalar denoting the lateral reference length.	`[]`
`dim`	Character vector denoting the specified system of units for the case.	`'ft'`
`deriv`	Character vector denoting the specified angle units for the case.	`'deg'`
`save`	Logical denoting whether the input values for this case are used in the next case.	`false`
`stype`	Scalar denoting the type of asymmetric flap for the case.	`[]`
`trim`	Logical denoting the reading of trim data for the case. When trim runs are read, this value is set to `true`.	`false`
`damp`	Logical denoting the reading of dynamic derivative data for the case. When dynamic derivative runs are read, this value is set to `true`.	`false`
`build`	Scalar denoting the reading of build data for the case. When build runs are read, this value is set to the number of build runs depending on the vehicle configuration.	`1`
`part`	Logical denoting the reading of partial data for the case. When partial runs are written for each Mach number, this value is set to `true`.	`false`
`hypeff`	Logical denoting the reading of hypersonic data for the case. When hypersonic data is read, this value is set to `true`.	`false`
`ngh`	Scalar denoting the number of ground altitudes.	`0`
`nolat`	Logical denoting the calculation of the lateral-direction derivatives is inhibited.	`false`
`config`	Structure of logicals and structures detailing the case configuration and fin deflections.	config.body = false; config.fin1.avail = false; config.fin1.npanel = []; config.fin1.delta = []; config.fin2.avail = false; config.fin2.npanel = []; config.fin2.delta = []; config.fin3.avail = false; config.fin3.npanel = []; config.fin3.delta = []; config.fin4.avail = false; config.fin4.npanel = []; config.fin4.delta = [];
`nolat_namelist`	Logical denoting the calculation of the lateral-direction derivatives is inhibited in the DATCOM input case.	`false`
`version`	Version of DATCOM file.	`2007`

Static Longitude and Lateral Stability Fields Available for the 2007, 2008, 2011, and 2014 Versions (File Type 6)

Field	Matrix of...	Function of...
`cd`	Drag coefficients, which are defined positive for an aft-acting load.	`alpha`, `mach`, `alt`, `build`
`cl`	Lift coefficients, which are defined positive for an up-acting load.	`alpha`, `mach`, `alt`, `build`
`cm`	Pitching-moment coefficients, which are defined positive for a nose-up rotation.	`alpha`, `machalt`, `build`
`cn`	Normal-force coefficients, which are defined positive for a normal force in the +Z direction.	`alpha`, `mach`, `alt`, `build`
`ca`	Axial-force coefficients, which are defined positive for a normal force in the +X direction.	`alpha`, `mach`, `alt`, `build`
`xcp`	Distances between moment reference center and the center of pressure divided by the longitudinal reference length. These distances are defined positive for a location forward of the center of gravity.	`alpha`, `mach`, `alt`, `build`
`cna`	Derivatives of normal-force coefficients relative to `alpha`.	`alpha`, `mach`, `alt`, `build`
`cma`	Derivatives of pitching-moment coefficients relative to `alpha`.	`alpha`, `mach`, `alt`, `build`
`cyb`	Derivatives of side-force coefficients relative to sideslip angle.	`alpha`, `mach`, `alt`, `build`
`cnb`	Derivatives of yawing-moment coefficients relative to sideslip angle.	`alpha`, `mach`, `alt`, `build`
`clb`	Derivatives of rolling-moment coefficients relative to sideslip angle.	`alpha`, `mach`, `alt`, `build`
`clod`	Ratios of lift coefficient to drag coefficient.	`alpha`, `mach`, `alt`, `build`
`cy`	Side-force coefficients.	`alpha`, `mach`, `alt`, `build`
`cln`	Yawing-moment coefficient in body-axis.	`alpha`, `mach`, `alt`, `build`
`cll`	Rolling-moment coefficient in body-axis.	`alpha`, `mach`, `alt`, `build`

Dynamic Derivative Fields for the 2007, 2008, 2011, and 2014 Versions (File Type 6)

Field	Matrix of...	Function of...
`cnq`	Normal-force derivatives due to pitch rate.	`alpha`, `mach`, `alt`, `build`
`cmq`	Pitching-moment derivatives due to pitch rate.	`alpha`, `mach`, `alt`, `build`
`caq`	Axial-force derivatives due to pitch rate.	`alpha`, `mach`, `alt`, `build`
`cnad`	Normal-force derivatives due to rate of angle of attack.	`alpha`, `mach`, `alt`, `build`
`cmad`	Pitching-moment derivatives due to rate of angle of attack.	`alpha`, `mach`, `alt`, `build`
`clp`	Rolling-moment derivatives due to roll rate.	`alpha`, `mach`, `alt`, `build`
`cyp`	Lateral-force derivatives due to roll rate.	`alpha`, `mach`, `alt`, `build`
`cnp`	Yawing-moment derivatives due to roll rate.	`alpha`, `mach`, `alt`, `build`
`cnr`	Yawing-moment derivatives due to yaw rate.	`alpha`, `mach`, `alt`, `build`
`clr`	Rolling-moment derivatives due to yaw rate	`alpha`, `mach`, `alt`, `build`
`cyr`	Side-force derivatives due to yaw rate.	`alpha`, `mach`, `alt`, `build`

Fields for 2007, 2008, 2011, and 2014 Versions (File Type 21)

2007, 2008, 2011, and 2014 versions of file type 21 DATCOM files must contain these fields.

Common Fields for the 2007, 2008, 2011, and 2014 Versions (File Type 21)

Field	Description	Default
`mach`	Array of Mach numbers.	`[]`
`alt`	Array of altitudes.	`[]`
`alpha`	Array of angles of attack.	`[]`
`nalpha`	Number of angles of attack.	`0`
`beta`	Scalar containing sideslip angle. Note This value does not appear correctly for the 2014 version. It always displays 0.	`0`
`total_col`	Scalar denoting the type of looping performed to generate the DATCOM file. When `loop` is 1, `mach` and `alt` are varied together. The only loop option for the 2007, 2008, 2011, and 2014 versions of DATCOM is `loop` equal to `1`.	`[]`
`deriv_col`	Logical denoting the calculation of the lateral-direction derivatives is inhibited.	`0`
`config`	Structure of logicals and structures detailing the case configuration and fin deflections.	config.fin1.delta = zeros(1,8); config.fin2.delta = zeros(1,8); config.fin3.delta = zeros(1,8); config.fin4.delta = zeros(1,8);
`version`	Version of DATCOM file.	`2007`

Static Longitude and Lateral Stability Fields Available for the 2007, 2008, 2011, and 2014 Versions (File Type 21)

Field	Matrix of...	Function of...
`cn`	Normal-force coefficients, which are defined positive for a normal force in the +Z direction.	`alpha`, `mach`, `alt`, `beta`, `config.fin1.delta`, `config.fin2.delta`, `config.fin3.delta`, `config.fin4.delta`
`cm`	Pitching-moment coefficients, which are defined positive for a nose-up rotation.	`alpha`, `mach`, `alt`, `beta`, `config.fin1.delta`, `config.fin2.delta`, `config.fin3.delta`, `config.fin4.delta`
`ca`	Axial-force coefficients, which are defined positive for a normal force in the +X direction.	`alpha`, `mach`, `alt`, `beta`, `config.fin1.delta`, `config.fin2.delta`, `config.fin3.delta`, `config.fin4.delta`
`cy`	Side-force coefficients.	`alpha`, `mach`, `alt`, `beta`, `config.fin1.delta`, `config.fin2.delta`, `config.fin3.delta`, `config.fin4.delta`
`cln`	Yawing-moment coefficient in body-axis.	`alpha`, `mach`, `alt`, `beta`, `config.fin1.delta`, `config.fin2.delta`, `config.fin3.delta`, `config.fin4.delta`
`cll`	Rolling-moment coefficient in body-axis.	`alpha`, `mach`, `alt`, `beta`, `config.fin1.delta`, `config.fin2.delta`, `config.fin3.delta`, `config.fin4.delta`

Dynamic Derivative Fields for the 2007, 2008, 2011, and 2014 Versions (File Type 21)

Field	Matrix of...	Function of...
`cnad`	Normal-force derivatives due to rate of angle of attack.	`alpha`, `mach`, `alt`, `beta`, `config.fin1.delta`, `config.fin2.delta`, `config.fin3.delta`, `config.fin4.delta`
`cmad`	Pitching-moment derivatives due to rate of angle of attack.	`alpha`, `mach`, `alt`, `beta`, `config.fin1.delta`, `config.fin2.delta`, `config.fin3.delta`, `config.fin4.delta`
`cnq`	Normal-force derivatives due to pitch rate.	`alpha`, `mach`, `alt`, `beta`, `config.fin1.delta`, `config.fin2.delta`, `config.fin3.delta`, `config.fin4.delta`
`cmq`	Pitching-moment derivatives due to pitch rate.	`alpha`, `mach`, `alt`, `beta`, `config.fin1.delta`, `config.fin2.delta`, `config.fin3.delta`, `config.fin4.delta`
`caq`	Axial-force derivatives due to pitch rate.	`alpha`, `mach`, `alt`, `beta`, `config.fin1.delta`, `config.fin2.delta`, `config.fin3.delta`, `config.fin4.delta`
`cyq`	Side-force due to pitch rate.	`alpha`, `mach`, `alt`, `beta`, `config.fin1.delta`, `config.fin2.delta`, `config.fin3.delta`, `config.fin4.delta`
`clnq`	Yawing-moment due to pitch rate.	`alpha`, `mach`, `alt`, `beta`, `config.fin1.delta`, `config.fin2.delta`, `config.fin3.delta`, `config.fin4.delta`
`cllq`	Rolling-moment due to pitch rate.	`alpha`, `mach`, `alt`, `beta`, `config.fin1.delta`, `config.fin2.delta`, `config.fin3.delta`, `config.fin4.delta`
`cnp`	Yawing-moment derivatives due to roll rate.	`alpha`, `mach`, `alt`, `beta`, `config.fin1.delta`, `config.fin2.delta`, `config.fin3.delta`, `config.fin4.delta`
`cap`	Axial-force due to roll rate.	`alpha`, `mach`, `alt`, `beta`, `config.fin1.delta`, `config.fin2.delta`, `config.fin3.delta`, `config.fin4.delta`
`cyp`	Lateral-force derivatives due to roll rate.	`alpha`, `mach`, `alt`, `beta`, `config.fin1.delta`, `config.fin2.delta`, `config.fin3.delta`, `config.fin4.delta`
`clnp`	Yawing-moment due to roll rate.	`alpha`, `mach`, `alt`, `beta`, `config.fin1.delta`, `config.fin2.delta`, `config.fin3.delta`, `config.fin4.delta`
`cllp`	Rolling-moment due to roll rate.	`alpha`, `mach`, `alt`, `beta`, `config.fin1.delta`, `config.fin2.delta`, `config.fin3.delta`, `config.fin4.delta`
`cnr`	Yawing-moment derivatives due to yaw rate.	`alpha`, `mach`, `alt`, `beta`, `config.fin1.delta`, `config.fin2.delta`, `config.fin3.delta`, `config.fin4.delta`
`car`	Axial-force due to yaw rate.	`alpha`, `mach`, `alt`, `beta`, `config.fin1.delta`, `config.fin2.delta`, `config.fin3.delta`, `config.fin4.delta`
`cyr`	Side-force derivatives due to yaw rate.	`alpha`, `mach`, `alt`, `beta`, `config.fin1.delta`, `config.fin2.delta`, `config.fin3.delta`, `config.fin4.delta`
`clnr`	Yawing-moment due to yaw rate.	`alpha`, `mach`, `alt`, `beta`, `config.fin1.delta`, `config.fin2.delta`, `config.fin3.delta`, `config.fin4.delta`
`cllr`	Rolling-moment due to yaw rate.	`alpha`, `mach`, `alt`, `beta`, `config.fin1.delta`, `config.fin2.delta`, `config.fin3.delta`, `config.fin4.delta`

Fields for 2008, 2011, and 2014 Version (File Type 42)

2008, 2011, and 2014 versions of file type 42 DATCOM files must contain these fields.

Fields for the 2008, 2011, and 2014 Version (File Type 42)

Field	Description	Default
`case`	Character vector containing the case ID.	`[]`
`totalCol`	Scalar containing number of columns of data in file.	`[]`
`mach`	Array of Mach numbers.	`[]`
`alt`	Array of altitudes.	`[]`
`alpha`	Array of angles of attack.	`[]`
`nmach`	Number of Mach numbers.	`0`
`nalpha`	Number of angles of attack.	`0`
`rnnub`	Array of Reynolds numbers.	`[]`
`q`	Dynamic pressure.	`[]`
`beta`	Scalar containing sideslip angle. Note This value does not appear correctly for the 2014 version. It always displays 0.	`0`
`phi`	Scalar containing aerodynamic roll angle.	`0`
`sref`	Scalar denoting the reference area for the case.	`[]`
`cbar`	Scalar denoting the longitudinal reference length.	`[]`
`blref`	Scalar denoting the lateral reference length.	`[]`
`xcg`	Distance from nose to center of gravity.	`[]`
`xmrp`	Distance from nose to center of gravity, measured in calibers.	`[]`
`deriv`	Character vector denoting the specified angle units for the case.	`'deg'`
`trim`	Logical denoting the reading of trim data for the case. When trim runs are read, this value is set to `true`.	`false`
`damp`	Logical denoting the reading of dynamic derivative data for the case. When dynamic derivative runs are read, this value is set to `true`.	`false`
`build`	Scalar denoting the reading of partial data for the case. This value is set to the number of partial runs depending on the vehicle configuration.	`1`
`part`	Logical denoting the reading of partial data for the case. When partial runs are written for each Mach number, this value is set to `true`.	`false`
`nolat`	Logical denoting the calculation of the lateral-direction derivatives is inhibited.	`true`
`config`	Structure of logicals and structures detailing the case configuration and fin deflections.	config.body = false; config.fin1.avail = false; config.fin1.npanel = []; config.fin1.delta = []; config.fin2.avail = false; config.fin2.npanel = []; config.fin2.delta = []; config.fin3.avail = false; config.fin3.npanel = []; config.fin3.delta = []; config.fin4.avail = false; config.fin4.npanel = [];
`version`	Version of DATCOM file.	`2008`

Static Longitude and Lateral Stability Fields Available for the 2008, 2011, and 2014 Versions (File Type 42)

Field	Matrix of...	Function of...
`delta`	Trim deflection angles.	`alpha`, `mach`
`cd`	Drag coefficients, which are defined positive for an aft-acting load.	`alpha`, `mach`, `build`
`cl`	Lift coefficients, which are defined positive for an up-acting load.	`alpha`, `mach`, `build`
`cm`	Pitching-moment coefficients, which are defined positive for a nose-up rotation.	`alpha`, `mach`, `build`
`cn`	Normal-force coefficients, which are defined positive for a normal force in the +Z direction.	`alpha`, `mach`, `build`
`ca`	Axial-force coefficients, which are defined positive for a normal force in the +X direction.	`alpha`, `mach`, `build`
`caZeroBase`	Axial-force coefficient with no base drag included.	`alpha`, `mach`, `build`
`caFullBase`	Axial-force coefficient with full base drag included.	`alpha`, `mach`, `build`
`xcp`	Distance from nose to center of pressure.	`alpha`, `mach`, `build`
`cna`	Derivatives of normal-force coefficients relative to `alpha`.	`alpha`, `mach`, `build`
`cma`	Derivatives of pitching-moment coefficients relative to `alpha`.	`alpha`, `mach`, `build`
`cyb`	Derivatives of side-force coefficients relative to sideslip angle.	`alpha`, `mach`, `build`
`cnb`	Derivatives of yawing-moment coefficients relative to sideslip angle.	`alpha`, `mach`, `build`
`clb`	Derivatives of rolling-moment coefficients relative to sideslip angle.	`alpha`, `mach`, `build`
`clod`	Ratios of lift coefficient to drag coefficient.	`alpha`, `mach`, `build`
`cy`	Side-force coefficient.	`alpha`, `mach`, `build`
`cln`	Yawing-moment coefficient.	`alpha`, `mach`, `build`
`cll`	Rolling-moment coefficient.	`alpha`, `mach`, `build`

Dynamic Derivative Fields for the 2008, 2011, and 2014 Version (File Type 42)

Field	Matrix of...	Function of...
`cnq`	Normal-force derivatives due to pitch rate.	`alpha`, `mach`, `alt`, `build`
`cmq`	Pitching-moment derivatives due to pitch rate.	`alpha`, `mach`, `alt`, `build`
`caq`	Axial-force derivatives due to pitch rate.	`alpha`, `mach`, `alt`, `build`
`cnad`	Normal-force derivatives due to rate of angle of attack.	`alpha`, `mach`, `alt`, `build`
`cmad`	Pitching-moment derivatives due to rate of angle of attack.	`alpha`, `mach`, `alt`, `build`
`cyq`	Lateral-force derivatives due to pitch rate.	`alpha`, `mach`, `alt`, `build`
`clnq`	Yawing-moment derivatives due to pitch rate.	`alpha`, `mach`, `alt`, `build`
`cllq`	Rolling-moment derivatives due to pitch rate.	`alpha`, `mach`, `alt`, `build`
`cyr`	Side-force derivatives due to yaw rate.	`alpha`, `mach`, `alt`, `build`
`clnr`	Yawing-moment derivatives due to yaw rate.	`alpha`, `mach`, `alt`, `build`
`cllr`	Rolling-moment derivatives due to yaw rate.	`alpha`, `mach`, `alt`, `build`
`cyp`	Lateral-force derivatives due to roll rate.	`alpha`, `mach`, `alt`, `build`
`clnp`	Yawing-moment derivatives due to roll rate.	`alpha`, `mach`, `alt`, `build`
`cllp`	Rolling-moment derivatives due to roll rate.	`alpha`, `mach`, `alt`, `build`
`cnp`	Normal-force derivatives due to roll rate.	`alpha`, `mach`, `alt`, `build`
`cmp`	Pitching-moment derivatives due to roll rate.	`alpha`, `mach`, `alt`, `build`
`cap`	Axial-force derivatives due to roll rate.	`alpha`, `mach`, `alt`, `build`
`cnr`	Normal-force derivatives due to yaw rate.	`alpha`, `mach`, `alt`, `build`
`cmr`	Pitching-moment derivatives due to roll rate.	`alpha`, `mach`, `alt`, `build`
`car`	Axial-force derivatives due to yaw rate.	`alpha`, `mach`, `alt`, `build`

References

[1] AFFDL-TR-79-3032: The USAF Stability and Control DATCOM, Volume 1, User's Manual

[2] AFRL-VA-WP-TR-1998-3009: MISSILE DATCOM, User's Manual – 1997 FORTRAN 90 Revision

[3] AFRL-RB-WP-TR-2009-3015: MISSILE DATCOM, User's Manual – 2008 Revision

[4] AFRL-RB-WP-TR-2011-3071: MISSILE DATCOM, User's Manual – 2011 Revision

[5] AFRL-RQ-WP-TR-2014-3999: MISSILE DATCOM, Users Manual – 2014 Revision

Version History

Introduced in R2006b

datcomimport

Syntax

Description

Examples

Read Digital DATCOM Files

Input Arguments

`file` — DATCOM file
character vector | cell array of file names

Dependencies

`usenan` — Replace data points
`true` (default) | `false`

`verbose` — Read status
`2` (default) | `0` | `1`

`filetype` — DATCOM file type
`6` (default) | `2142`

Output Arguments

`aero` — DATCOM structures
cell array of structures

Limitations

More About

Fields for 1976 Version (File Type 6)

Fields for 1999 Version (File Type 6)

Fields for 2007, 2008, 2011, and 2014 Versions (File Type 6)

Fields for 2007, 2008, 2011, and 2014 Versions (File Type 21)

Fields for 2008, 2011, and 2014 Version (File Type 42)

References

Version History

See Also

Topics

datcomimport

Syntax

Description

Examples

Read Digital DATCOM Files

Input Arguments

file — DATCOM file character vector | cell array of file names

Dependencies

usenan — Replace data points true (default) | false

verbose — Read status 2 (default) | 0 | 1

filetype — DATCOM file type 6 (default) | 2142

Output Arguments

aero — DATCOM structures cell array of structures

Limitations

More About

Fields for 1976 Version (File Type 6)

Fields for 1999 Version (File Type 6)

Fields for 2007, 2008, 2011, and 2014 Versions (File Type 6)

Fields for 2007, 2008, 2011, and 2014 Versions (File Type 21)

Fields for 2008, 2011, and 2014 Version (File Type 42)

References

Version History

See Also

Topics

`file` — DATCOM file
character vector | cell array of file names

`usenan` — Replace data points
`true` (default) | `false`

`verbose` — Read status
`2` (default) | `0` | `1`

`filetype` — DATCOM file type
`6` (default) | `2142`

`aero` — DATCOM structures
cell array of structures