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
