# Digital DATCOM Forces and Moments

Compute aerodynamic forces and moments using Digital DATCOM static and dynamic stability derivatives

**Library:**Aerospace Blockset / Aerodynamics

## Description

The Digital DATCOM Forces and Moments block computes the aerodynamic forces and moments about the center of gravity using aerodynamic coefficients from Digital DATCOM.

The Digital DATCOM Forces and Moments block port labels change based on
the input and output units selected from the **Units** list.

## Limitations

The Digital DATCOM Forces and Moments block supports only Digital DATCOM, which is the 1976 version of DATCOM.

The operational limitations of Digital DATCOM apply to the data contained in the

**Digital DATCOM structure**parameter. For more information on Digital DATCOM limitations, see Section 2.4.5 of reference [1].The

**Digital DATCOM structure**parameters`alpha`

,`mach`

,`alt`

,`grndht`

, and`delta`

must be strictly monotonically increasing to be used with the Digital DATCOM Forces and Moments block.The

**Digital DATCOM structure**coefficients must correspond to the dimensions of the breakpoints (`alpha`

,`mach`

,`alt`

,`grndht`

, and`delta`

) to be used with the Digital DATCOM Forces and Moments block.

## Ports

### Input

### Output

## Parameters

## Model Examples

## Algorithms

## References

[1] *The USAF Stability
and Control Digital Datcom*, AFFDL-TR-79-3032, 1979.

[2] Etkin, B., and L. D. Reid.
*Dynamics of Flight Stability and Control,* Hoboken, NJ: John
Wiley & Sons, 1996.

[3] Roskam, J. "Airplane Design Part VI: Preliminary Calculation of Aerodynamic, Thrust and Power Characteristics", Roskam Aviation and Engineering Corporation, Ottawa, Kansas: 1987.

[4] Stevens, B. L., and F. L. Lewis.
*Aircraft Control and Simulation,* Hoboken, NJ: John Wiley
& Sons, 1992.

## Extended Capabilities

**Introduced in R2006b**