Angel Aircraft

[Travis]

I've been creating a model of the Angel Aircraft for FS9.  I have the model nearly complete, but I can't seem to get the flight dynamics to work properly.

I used AirWrench to create the airfile, using the information found here and in this PDF.

Every time I start it, I can't seem to get it into the air.  It gets up to speed, but the nose stays glued to the ground.  The only way I can get it to fly is to slew it up in the air and then apply massive elevator trim.

What could be the cause?

[Felix/FFDS]

Remember to check your e-mail for the link to the photos I took!!

[Brett_Henderson]

The trick to getting these new model to fly correctly, is to start with accurate numbers and geometry.

It sounds like your control surface placement, and size... and your CoG might be off.

[Milton]

Brett is on it.

Also, go here http://pagesperso-orange.fr/hsors/index.html and download AFSD for more help on seeing exactly what your numbers are.

Verify that your main gear placement is correct relative to CoG, and that CoG (fuel tank locations especially at/near 0,0,0) is at 25% MAC.

Then ensure your engines placement is at or near CoG vertically. i.e. +n, +-n, 0  like this:

Engine.0 = 7.5, -6.5, 0.0
Engine.1 = 7.5, 6.5, 0.0

If your thrustline is above CoG, it will cause a nose down moment.  A small nose down moment may be preferable but that can be achieved with +.1" to +1" placement.  If engines are well above CoG, you may experience what you have now.

[Travis]

Thanks for all the help, folks.

I've finally gotten it flying correctly, and I have the textures about 25% done.  I should have a beta model between the middle of the month and Halloween, depending on panel stuff and gauges.

Any other help is very much welcome.

Oh, and I got those shots, Felix.  Very nice!  They really helped with details of the aircraft.

[sall]

The Angel was certified FAR Part 23 in the USA by the Federal Aviation Administration (FAA) in late 1992. Angel Aircraft throw out extremely hot flares that attract heat-seeking missiles away from the engines of the aircraft. It was started by Carl Mortenson, a pilot and aircraft mechanic with 50 years of aviation experience.
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Sally
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