I have one plane with a pitch speed of 150 or so and it does an easy 185 straight and level.
That's funny... Out of curiosity, what engine, prop and plane do you have that does an easy 185... 35 mph faster than the prop?
Plus allot of engine dont unload in the air in fact some bog down even more once in the air which is good sometimes. that 13x10 is stalled on the ground and gets working in the air.
Errr....???...??? What? I don't even know where to start with this...