# AEROS

Bulk Data Entry Defines basic parameters for static aeroelasticity.

## Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
AEROS ACSID RCSID REFC REFB REFS SYMXZ SYMXY

## Example

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
AEROS 13 11 3.0 20.0 1200.0 1

## Definitions

Field Contents SI Unit Example
ACSID Aerodynamic coordinate system identification.

Default = 0 (Integer ≥ 0)

RCSID Reference coordinate system identification for rigid body motion.

Default = 0 (Integer ≥ 0)

REFC Reference chord length.

(Real > 0.0)

REFB Reference span.

(Real > 0.0)

REFS Reference wing area.

(Real > 0.0)

SYMXZ Symmetry key for the aero coordinate X-Z plane.
If case control entry AESYMXZ is specified, then this field is ignored.
= 1
For symmetry
= 0 (Default)
For no symmetry
= -1
For anti-symmetry

SYMXY Symmetry key for the aero coordinate X-Y plane can be used to simulate ground effects.
If case control entry AESYMXY is specified, then this field is ignored.
= 1
For anti-symmetry
= 0 (Default)
For no symmetry
= -1
For symmetry

1. This entry is mandatory for static aeroelasticity models. Only a single AEROS entry is allowed.
2. The ACSID field should be a rectangular coordinate system. Flow is in the positive X-direction (T1).
3. The RCSID field should be a rectangular coordinate system. All AESTAT degrees of freedom defining trim variables will be defined in this coordinate system. Additionally, the aerodynamic trim coefficients and monitor tables printed in the .trim file are computed based on RCSID.
4. REFB should be full span, even on half-span models.
5. REFS should be half area on half-span models.