Does anyone know what records to change in the AIR file, or what parameter to change in the aircraft.cfg file, to reduce the effect of forward airspeed on the rotation of the propeller?The FS2004 default Cessna 172 windmills quite a lot with the engine off. I'd like to reduce this if possible.Some other Cessna aircraft downloads do not rotate at all with the engine switched off in the air.I'd like some balance in the middle of these extremes.Also, if you apply full power holding it on the brakes on the runway and note the max RPM, then release brakes and accelerate down the runway, the default 172 propellor speeds up as you gain forward airspeed on the take off roll too.Any suggestions on what to try to modify this?Thanks, Gavin

Does anyone know what records to change in the AIR file, or what parameter to change in the aircraft.cfg file, to reduce the effect of forward airspeed on the rotation of the propeller?The FS2004 default Cessna 172 windmills quite a lot with the engine off. I'd like to reduce this if possible.Some other Cessna aircraft downloads do not rotate at all with the engine switched off in the air.I'd like some balance in the middle of these extremes.Also, if you apply full power holding it on the brakes on the runway and note the max RPM, then release brakes and accelerate down the runway, the default 172 propellor speeds up as you gain forward airspeed on the take off roll too.Any suggestions on what to try to modify this?Thanks, Gavin

I'm not sure how realistic what you want to do is.The Cessna 172 has a fixed pitch propellor and an ungoverned engine. There is no reason why the rpm should remain constant as the aircraft accelerates. The increasing airspeed affects the effective angle of attack of the propeller blades and tends to unload them. I'd expect this to cause the rpm to increase as it does.

Does anyone know what records to change in the AIR file, or what parameter to change in the aircraft.cfg file, to reduce the effect of forward airspeed on the rotation of the propeller?

Hi, Gavin...MGH is quite correct. Revs should increase during the takeoff roll. Likewise, a dead engine with a fixed prop (or an unfeathered variable pitch prop) will windmill while in flight. Generally speaking, the only way to stop a fixed pitch prop in flight is to slow down to stall speed or below. Occasionally, props on small GA aircraft will stop as the aircraft enters a spin, but you can't count on that.Cheers,Glenn

Hi, Gavin...MGH is quite correct. Revs should increase during the takeoff roll. Likewise, a dead engine with a fixed prop (or an unfeathered variable pitch prop) will windmill while in flight. Generally speaking, the only way to stop a fixed pitch prop in flight is to slow down to stall speed or below. Occasionally, props on small GA aircraft will stop as the aircraft enters a spin, but you can't count on that.Cheers,Glenn

Hi guys,Thanks for your replies. I know the prop should rotate - I just want to reduce the amount of extra rotation that forward airspeed generates. It is too much and not realistic for some aircraft models and I would like to "fine-tune" this if possible. Any ideas how? Gavin

Hello Gavin,In the [piston_engine] section of the aircraft.cfg fille you will find ttwo parametersmax_rpm_friction_scalar= 1.0 idle_rpm_friction_scalar= 1.0 If you increase the value of the max_rpm_friction_scalar parameter you will decrease the maximum value of the rnginre RPM. If you increase the value of idle_rpm_friction_scalar you will decrease the idle engine RPM.However be aware that this change will affect tthe performance of the aircraft. For example if you increase the max_rpm_friction_scalar parameter you will decrease the maximum airspeed of the aircraft. You will have to make seceral test to determine what may be the best valiue to fit what you are looking for. So don't forget to make a safegard copy of your originnal aircraft.cfg file under another name..Have a good dayBenoit

Benoit, I would like to throw a THANK-YOU! for the F8-F Bear Kitty. MY FAVORITE, even for putzin around. Used it often for the RTW race. Why spend the time climbing to FL25 when you can stick at 16/18 K feet and pass anyone.... depending on WX. I seen the "ALPHA BLEU CIEL" in the last post ( sorry, no French ) so you must be a part of the team/solo... Anyhow the F8 is great! like the F4-U too. ( US des. ) Roman

Hello Roman,Thank for yorr kind words about the projects Corsair and Bearcat. Both were used by french navy fighter pilots. As you can see with my avatar (french navy insigna) I like the navy aircrafts, all the navy aircrafts, american, british, french, etc.Another exterme sport, with a lot of adrenaline, it is the landing on an aircraft carrier, partticularly with these WWII aircrafts eithout all the modern navigation aids. But I agree with you air race is more demanding since there is a competition.Have a good dayBenoit