I am guessing you jam the wastegate full open. Lycomings are tough that is for suretrey kule wrote: Sat Dec 10, 2022 3:38 am Just a bit or trivia. Back in the 70s when some folks in Columbia were do ing international cargo flights at twice the MCTOW, they tweaked the engines on the Navajos to take off….”once…”at about 76” MP.
Apparently, according to the folks at Flight Safety, was not particularly difficult to do, but I have forgotten the details.
Homebuilder BS
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Big Pistons Forever
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Big Pistons Forever
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That makes sense. The airplane can make full power at 18,000 feet so that would require an extra 15 psiColonel wrote: Sun Dec 11, 2022 3:34 am If that 76" MP number is correct, and the rated takeoff power is 46" ...
that means the turbocharger has 30" or 15 psi of extra boost to spare at sea level! That's a full atmosphere!!
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anofly
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I think 18000 feet is about half way through the atmosphere .
I think there is about 7psi of atmosphere at 18000 feet.
To get to full power you would have to add about another 7 psi (plus a bit for turbocharger) to bring you back to sea level pressure
you would have to add about 15 inches of mercury to get back to sea level power...
I think there is about 7psi of atmosphere at 18000 feet.
To get to full power you would have to add about another 7 psi (plus a bit for turbocharger) to bring you back to sea level pressure
you would have to add about 15 inches of mercury to get back to sea level power...
