Re: [Flightgear-devel] 3D model origin proposal

[Erik Hofman]

Tony Peden wrote:

--- Erik Hofman <[EMAIL PROTECTED]> wrote:

Jon Berndt wrote:

Well, to rotate the aircraft realistically the refference point

should

be known by the 3D modellers, but that aside.

The rigid body rotates about the CG, not the aero ref. pt.

Even when in motion?

In the FDM's (all of them, AFAIK), yes. Always.
In reality, the aircraft will rotate about the cg in air and some other
point if any of the gear are touching the ground.  During takeoff
rotation and landing de-rotation, for example, the aircraft will rotate
about the main gear.

This confuses me a bit. My gut feeling tels me that the lift generated on the various parts of the aircraft (fuselage included) would concentrate the aircrafts rotation around its aero reff. point instead of CG. Or is this the part where the moving CG comes in place?

Erik


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