Percent power altitude

Anyone tell me at what altitude I get 75% and 65% power respctively
(with full throttle, normally aspirated).

You don't have a POH?

On 10/21/2006 10:33 AM, Doug wrote the following:
Anyone tell me at what altitude I get 75% and 65% power respctively
(with full throttle, normally aspirated).

Doug wrote
Anyone tell me at what altitude I get 75% and 65% power respctively
(with full throttle, normally aspirated).

See the graph at:

http://www.kellyaerospace.com/articl...bocharging.pdf

Bob Moore

Mitty wrote
You don't have a POH?

You know, he might not even have an airplane. He just asked
a question and expected an answer, not a wise crack.

No POH required, answer is not aircraft specific, see:

http://www.kellyaerospace.com/articl...bocharging.pdf

Bob Moore

In article .com,
"Doug" wrote:

Anyone tell me at what altitude I get 75% and 65% power respctively
(with full throttle, normally aspirated).

Depends on the engine, depends on the OAT (density altitude).

john smith wrote
Depends on the engine, depends on the OAT (density altitude).

Not on the engine as long as it's "normally aspirated' as
specified in the OP.

Bob Moore

5 and 7 thousand
"Doug" wrote in message
oups.com...
| Anyone tell me at what altitude I get 75% and 65% power
respctively
| (with full throttle, normally aspirated).
|

Jim Macklin wrote
5 and 7 thousand

Running on (faulty) memory again, Jim?

How about 7,500' and about 12,500', ISA of course.

See my previous replies to this thread for a real chart
answer.

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.


Bad information is worse than no information at all.

Bob Moore

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

Bob Noel wrote

Bob Moore wrote:
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?

:-) The wing, of course. :-)

Bob Moore