eduardo Posted February 27 Report Share Posted February 27 (edited) Hello, greetings from Chile. I purchased RealSimGear's DA40 NG some days ago and I have been playing around with it. I discovered something that called my attention: retarding the throttle many times causes RPMs to increase into the yellow or even the red zone for some seconds —with the corresponding propeller and engine sound pitch going higher too— before decreasing again. Lets say I´m flying level at 1500 ft with 75% load which gives an IAS of 127 kts and 2030 rpm. Then, I retard the throttle to idle to start descent and slow down and RPMs go up to 2130 in the yellow zone for about 5 or 6 seconds before going down. The same happens when landing upon retarding to touch down, which is a little upsetting due to the increase in the propeller sound pitch which one usually associates with an increase in power. Is this normal? Edited February 27 by eduardo Quote Link to comment Share on other sites More sharing options...
Coop Posted February 29 Report Share Posted February 29 That is normal behavior, here is an image of the engine's propeller target RPM curve: The propeller acts as a speed-brake in a way with the engine at low throttle settings, and the drop in RPM after the initial surge is due to the decrease in speed of the aircraft. Quote Link to comment Share on other sites More sharing options...
eduardo Posted February 29 Author Report Share Posted February 29 Thank you. I think I'll have to get used to it . Quote Link to comment Share on other sites More sharing options...
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