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Norman, I just had a 7351 prop on my C85 trimmed and repitched to 7148. The 7351 was left over from when the engine was a C75 and had never been changed for C85 requirements of turning to a higher rpm. Prior to having that done, my max rpm during climb was about 2150. It now turns 2300 during full throttle climb at 80/90 mph. Before trimming and repitching it would cruise 108 mph at 2300. However I could not get much more than 2350 with full throttle at cruise. Now I get 104 mph at 2400 cruise, engine sounds less strained, and can get within about 25 rpm of redline at full throttle. I am getting a better climb rate now but don't really know the exact difference. Hope these numbers help you some. Roger ----- Original Message ----- From: "Ed Burkhead" <[EMAIL PROTECTED]> To: "Coupe-Tech" <[email protected]> Sent: Wednesday, April 07, 2004 12:15 PM Subject: FW: [COUPERS-TECH] N2601H back in Service > ----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]---- > > > Norman's response: > Ed: > > Thanks for the rapid response! > > You know, I didn't make a note of the exact RPM I was getting. I'll do > that > next time. I do remember that it tended to hang around the bottom of the > green arc almost all the time. I have a C85 with the metal prop, but I > don't > know the model with certainty. I'm thinking of having it pitched for > climb > since I plan to fly from about 4000 ft in mountainous areas > occasionally. > > I did get a level flight cruise of about 108mph, and occasionally held > steady at 115 with maybe a slight descent. Since it was a shakedown > though, > I didn't want to hang out there long. > > The tower I'm referring to is the control tower at my home field (PDT). > The > radio only cuts out when I am in the runup area, which is only about 600 > ft > from the base of the tower. If I turn around and backtrack just 40' or > so, > its fine.... > > NBC > N2601H > > > > > ========================================================================== == == > To leave this forum go to: http://ercoupers.com/lists.htm > Search the archives on http://escribe.com/aviation/coupers-tech/ > > > ========================================================================== ==== To leave this forum go to: http://ercoupers.com/lists.htm Search the archives on http://escribe.com/aviation/coupers-tech/
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