Flight Model Per Frame ?

[Ground To Cockpit]

Can Someone Explain me what "Flight Model Per Frame" is ?
And what is the effect when i set it to different value ?

I've surfing around Internet but didn't find the "Understandable" Answer.
I'm an English noob , that's why i said so.

So far i have try 1,2,3,4 & 5 but i didn't notice any different.
Am i miss something ?

What is the Function of Flight Model Per Frame ?

Thx Before :)

[Y2k]

It's the number of flight model physics calculations per graphics frame. By default, the flight physics model is updated twice during one single frame rendered by the graphics card. In general, the higher the number, the more accurate the flight physics, but your framerate may suffer. Unless you have major framerate problems, just leave it at the default value (2).

[MdMax]

Hello !

There's a topic here about this:
http://forums.x-plane.org/?showtopic=46519
http://wiki.x-plane.com/Chapter_5:_X-Plane_Menus#Operations_.26_Warnings

If your computer is able to render 30 FPS (30 frames per second), with "1" you'll get 30 processed flight models each second. With "2" you'll get 60 flight models each second...

I'm always using "2" or "3". Higher values can be useful for tiny model planes and aerobatics. This feature will use the CPU and not the GPU.

If your aircraft is shaking on the ground, and if you have low FPS (around 20), increasing the number of flight models per frame, and reducing graphic options may help.

Happy flying.