Quick Fix for New ATR "AI Use"

[Guest]

Hi Mates,The New ATR 42-300 Designed by F. S

[pacosancas 0]

Hi,In fact, the location of the center of gravity is altered from the real plane, it has been located a bit aft and a bit lower than the real plane. FS seems to be wrong in modelling certain aspects if the correct position in entered for the CG: the airplane would fall backwards when ending a pushback, or would bounce out of control when applying brakes at speed; for that reason I lowered the CG a little. Also, in order to get a smoother rotation at takeoff, the CG is a located a little backwards compared to the real plane. The effect you mention can be solved as you say, or also by lowering the CG position a bit, but this may produce anopther undesirable effect: when propeller pitch is suddenly changed in flight, the plane is often going into an uncontrollable dive. To correct this last effect, I have made another modified aircraft.cfg which lowers a bit the position of the engines, available at eureka.ya.com/pacosancasPaco (F. S

[Guest Coneman]

I've got to jump in here and say kudos to Paco for such a fabulous model. I have as much fun looking at it as I do flying :-) And the virtual cockpit is a real treat! I do have one question. It seems to be kind of underpowered. Is that the way the real thing is?Thanks,ToddKCOE

[pacosancas 0]

Hi,I need to do some more work on the propeller tables in the air file. If you use NP=77% at speeds aboove 140 KIAS, you will find it matches the specs with a small tolerance. The problem is at higher propeller rpm, then it is very underpowered (what happens acually is that the propeller is using a pitch angle too low at those speeds). Paco