Leaning and density altitude (performance altitude).



"Bob Noel" wrote in
message
...
| 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
|