Following a mag drop problem (cured by leaning), I opened the throttle fully, but could only achieve 2,200 rpm. The engine is red lined at 2,500, and supposed to produce 180bhp at 2,700. A quick burst down the runway felt ok, so we returned to the end of the runway and took off without a problem. Levelling off at 2,500', and leaving the throttle fully open still only achieved 2,350 rpm.
I suspect that max rpm would probably only be seen in a dive, but is 2,200 acceptable on the ground? Is it just that the propellor limits the engine speed when the aircraft is stationary? The engine is new - only just over 100 hours - and is fitted to a Cherokee Archer III.
