Ed, My experience is about the same as yours. I've had my Coupe up to 11,500 on a hot summer day over Nevada, Utah, & Wyoming, on the way to OSH. It took a long while to get there even with the "big" O-200 and a 48" prop.
Actually I got up to over 12,000 and was climbing at over 1000 FPM however; at the time I was being sucked up into a building thunderstorm (!) and made an 'executive decision' to turn 180 degrees and RUN AWAY (Monty Python style). I know that Maynard Smith out here in his O-200 powered & lite weight fabric winged 415C has been up into even thinner air over the Sierra's, but you'd have to ask him for details off line. Dan Hall N3968H ----- Original Message ----- From: "Ed Burkhead" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]>; "ety" <[email protected]> Sent: Tuesday, March 25, 2008 7:57 PM Subject: RE: FW: [ercoupe-tech] performance charts > > 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 >> > > > > ------------------------------------ > > Yahoo! Groups Links > > > > > > -- > No virus found in this incoming message. > Checked by AVG. > Version: 7.5.519 / Virus Database: 269.22.0/1341 - Release Date: 3/24/2008 > 3:03 PM > >
