March 14, 201016 yr I am wanting to reduce the performance on a 182RG to model what I fly in the RW. Does anyone know if there are tutorials on this or can someone walk me through it?Thanks,Cameron
March 15, 201016 yr ***make a backup of the original aircraft.cfg file***There's really only one way to do this.. and it takes a lot of time and work. First.. set up a flight at an airport with very low elevation and no elevation changes near it.. set winds to zero, and then set weather (barometric pressure and 15c temp) so that you have a density altitude of zero at 2000agl. This will give you a "sea level" zone to fly, and make short climbs, in.Then you need to sketch out a set of tables to record, airspeed/vertical-speed by altitude.. and note takeoff distances. Once you start tweaking one parameter, several aspects of performance will change.The 182RG has a constant-speed prop, so this limits how you can tweak thrust. If it's already giving you realistic; manilfold-pressure/RMP/airspeed, relationships... the only thing you want to adjust is propeller thrust, in the propeller paragraph...and only a wee bit. If large adjustments are needed here; you're already fighting a losing battle, and might have to build an cfg file from scratch.After recording enough data for the aircraft as it is now.. adjust propeller thrust so that a, level-flight, full-throttle, max-rpm airspeed is equal to your realistic goal. Then test climb performance, and indicated-airspeed every 2000ft up to 10,000ft. You'll likely have climb performance that needs tweaking, and the way to do this, is to try combinations of wing-efficiency, parasitic-drag, and induced-drag. Obviously, you'll have to go back and forth between these parameters and the thrust.. re-checking both airspeeds, and climbs.Then, when you've got it close.. check the takeoff roll. If this is way off.. just go back to the original cfg file, and prepare to build a cfg file from scratch (using exact dimensions, apexes, surface areas, MOIs, weights, etc.).. or download an air-file editor and get ready to REALLY get your hands dirty.
March 15, 201016 yr I am wanting to reduce the performance on a 182RG to model what I fly in the RW. Does anyone know if there are tutorials on this or can someone walk me through it?Thanks,CameronA real simple way to de-rate engine power is to change this setting in the aircraft.cfg file[piston_engine]power_scalar=X.XXTry 0.90 for a 10% reduction. Bert
March 15, 201016 yr A real simple way to de-rate engine power is to change this setting in the aircraft.cfg file[piston_engine]power_scalar=X.XXTry 0.90 for a 10% reduction.This can mess up the MP/RPM relationship.. and distort power loss with altitude... and send you down the path of having to mess with min/max blade pitch.
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