Altitude vs Performance
I appreciate that as you increase altitude the air gets thinner and the performance of a piston helicopter will go down. This being the reason that some piston helicopters have turbochargers fitted so that the actual hp is available at higher altitudes. How much power is actually lost in a piston helicopter at say 1000 feet above sea level and 2000 feet about sea level. If I had a 205hp engine and flew at 2000 ft would it be like 180hp or what?
Thanks