On my O-360 acording to the book 21" is only 55% power On The IO520 it was 57% power. To get 75% power on both engines I had to be at 25"
--- Brian Kraut <brian.kr...@engalt.com> wrote: > Of course everyone seems to use a little different > power setting when they > measure cruise speed. As far as I know on a > standard temperature and > pressure day full throttle at about 8,000' gives you > 75% power and taht is > what I generally use. If I am off on that altitude > or if anyone has a > correct formula for figuring what altitude it is for > different temperatures > I would like to know what it is. > > That is one of the nice things about having a > manifold pressure gauge. > Seting the throttle at 21" of pressure is 75% power > regardless of what your > altitude or the temperature is. (21" being roughly > 75% of 29.92") > > Brian Kraut > Engineering Alternatives, Inc. > www.engalt.com > > -----Original Message----- > From: > krnet-bounces+brian.kraut=engalt....@mylist.net > [mailto:krnet-bounces+brian.kraut=engalt....@mylist.net]On > Behalf Of > Mark Jones > Sent: Sunday, January 07, 2007 7:34 PM > To: KRnet; Pete Diffey > Subject: Re: KR> Flight report > > > Today, I was just tooling around at 2900. Wide open > rpm was hovering between > 3350 and 3400 but I did not stay there long enough > to get the speed up. I > did not want to push the engine just yet after doing > all that work on it. I > guess I am slowly building my faith back up. Here > are the specs I recorded > on my voice recorder while I was flying level at > 6000'. > Altitude: 6000' > Altimeter: 30.06 > Oil Temp 195 > RPM: 2900 > Exhaust temp: 1250 > Oil PSI: 35 > CHT: 280 > Indicated MPH: 125 > > > Mark Jones (N886MJ) > Wales, WI > Visit my web site: www.flykr2s.com > > > > _______________________________________ > Search the KRnet Archives at > http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to > krnet-le...@mylist.net > please see other KRnet info at > http://www.krnet.org/info.html > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
