In my posting I mentioned that the c172 was too hard to control and bring for a nice landing, and that real pilots had confirmed this.
Can you give specifics? I have 79.1 hours in C172's in my logbook (172M, 172P, 172P XP, and 172R), some others with more experience in type have also worked over or tested the 172 model. It's not perfect -- in particular, JSBSim doesn't model slipstream effects properly, and cannot easily model spins -- but it flies pretty close to the real thing.
The biggest problem is control feel -- a joystick, mouse, or spring-loaded computer yoke just doesn't feel anything at all like real airplane controls. The model may respond the same way to the same inputs, but it's hard for people to make the same inputs using the controls available for a typical home computer until they have a lot of sim experience; as a result, real pilots without much sim experience may find the model hard to fly. There are ways to compensate by fudging with the controls or flight model a bit, but those tricks tend to work for some people and make things even harder for others.
Another difficulty flying a simulated aircraft on a computer screen is field of view. When I land a real plane, I have a field of view of more than 180 deg including my peripheral vision; on the computer screen, I'm typically dealing with about 50 deg unless I move the mouse around. It's like trying to land a plane with blinders on. On the sim, you also miss the seat-of-the-pants effects that are so important for feeling out the flare, etc. (you know that you're on the back of the power curve when pushing the yoke forward actually slows the descent, and you feel that first in your posterior).
Now, all of that said, it's important to note that no two real 172's fly exactly the same -- one might flare forever and one might drop hard; one might have a gentle stall and one might almost break into an incipient spin; etc.
All the best,
David
I now realize that I should have been using yasim rather than jsbsim.
The only problem I have with yasim is that the plane does really weird things at takeoff until it's airborne. Once it is, it flys great!
I'm still only getting around 30fps - sometimes 50 or so if there's nothing around.
Is there anything I can do at compile time to up my frame rate?
How about with my X settings? glxgears gets about 2500 fps, and I've heard rumors of people getting 7000+ fps with the same geforce 5200.....
I'm running a P4 2.0gHz and 40 fps just doesn't sound right, even if I had EVERYTHING enabled(which I don't).
Any suggestions would be appreciated.
Thanks!
Mark
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