Oscar, I had always been told you lose roughly 3% for every thousand feet you go up with a normally aspirated engine. That would mean you'd be at 77% @ 7500' and only 46% at 18,000. That's close to what you are saying and is a general rule of thumb, I would imagine that you would have to verify that to be sure.
Fred Johnson Reno, NV -----Original Message----- From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net] On Behalf Of Oscar Zuniga Sent: Thursday, January 18, 2007 9:58 AM To: kr...@mylist.net; corvaircr...@mylist.net Subject: KR> % rated power I don't remember which list this came up on so I'll send to both. Roughly speaking, normally aspirated engines at wide open throttle will see about 75% power at 7500' and 50% power at 18,000' density altitude. That's assuming a whole host of things... proper mixture being one of them.
