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According to the Aircraft Flight Manual for my 415-E, the C-85 engine with a McCauley 1A90 series metal propeller is not to be operated continuously between 1950-2170 RPM. Your tach should have a yellow arc highlighting that range. Also, you might want to check the last digit of the prop number. I don't believe there were any McCauley 1A90's pitched flatter than 7146. Most 'coupes with metal props have the 7148 (climb), 7150 (standard), and 7152 (cruise). The 1950-2170 RPM caution applies to them all. Regards, Paul --- [EMAIL PROTECTED] wrote: > ----[Please read http://ercoupers.com/disclaimer.htm > before following any advice in this forum.]---- > > Lloyd; I don't think there is any RPM range you > need to avoid, except zero > >grin<. What static RPM do you turn with that 71/40 > prop? My fresh overhaul > C85 gets 2250 with a 71/50, so I would think that a > 71/40 would tend to be a > little on the high side? Climbs like a homesick > angel though, eh? > Lynn Nelsen N86997 52FL > > > __________________________________________________ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail http://personal.mail.yahoo.com/ ==^================================================================ EASY UNSUBSCRIBE click here: http://topica.com/u/?aVxiLm.aVzvvT Or send an email To: [EMAIL PROTECTED] This email was sent to: [EMAIL PROTECTED] T O P I C A -- Register now to manage your mail! http://www.topica.com/partner/tag02/register ==^================================================================
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