Compliments to Wayne on his jape. It's got more truth in it than I like. Coupes have never been great climbers even though they match planes with 30 more horsepower in cruise speed.
John, I had a way higher ceiling than 7,000' before I got my mixture cleaned and re-connected. I could get up to 12,500 even then though it did take longer. (I did have a 7146 prop rather than your ??47 - that shouldn't make all that much difference.) Even with leaning, it still takes a long time to get to 12,500'. The "highest" I ever got was 14,500' density altitude (about 11,500' that hot turbulent day in Nevada). Ed > -----Original Message----- > From: [email protected] [mailto:[EMAIL PROTECTED] On > Behalf Of John Roach > Sent: Tuesday, March 25, 2008 10:46 PM > To: e-tech > Subject: Re: FW: [ercoupe-tech] performance charts > > Another variable would be the ability to lean the engine on the ground. > As a flatlander, my carb is wired full rich and there is no sign of a > mixture control in the cockpit. Were I to contemplate flying out west, > I'd want to make sure that I could lean the carb well before I bought > the charts for the trip. I've had my 415C (C 85 with a 47 pitch prop and > gross about 1200 lbs) up to 7000 MSL on a hot summer day when I > estimated the density altitude as approximately 10,000 ft. It really had > no climb left at that point and it took a lot longer to get there than > it took to come down. > John Roach > N 2427H > > Ed Burkhead wrote: > > > > > > Dan, > > > > Perhaps you could post the engine, propeller type, length and pitch and > > intended gross weight on the forum and that would help us give you some > > guidelines. > > > > I don't think performance data was researched and published for the C > > model > > Coupes. > > > > I made one excursion through Wyoming with a C-85 at about 1350 lb. gross > > weight with an extreme climb propeller (7146 McCauley). With the engine > > leaned before takeoff, I got off the ground at the 1/3rd mark of each high > > altitude runway. > > > > Climbing after getting off was another issue. The downdrafts from the > > summer thermals after 10:30 a.m. dwarfed my climb rate. I had to look > > for a > > hot spot on the ground, fly over to it (low level) and circle in the > > enormous updraft. > > > > Before 10:30 a.m., the flying was the best I've ever had! > > > > (Limited experience, limited answer - but the best information I've got.) > > > > Ed > >
