In article ,
Bob Moore wrote:

The formula answer is:

bhp at altitude equals bhp at sea level times the quantity
(density ratio minus the quantity(1 minus density ratio divided by 7.55))

Works out to 76% at 7,500' and 64% at 12,500', or thereabouts.

OK, I'm confused. Full throttle, 64%, is 12,500' for any engine?
How come my cherokee 140 couldn't even get to 12,500'?
What am I overlooking?

--
Bob Noel
Looking for a sig the
lawyers will hate