Randy. You did not tell us what propeller you have. Prop and engine (plus airframe) are always an entity when it comes to flight efficiency. Second. Using tach time for your calculation is ok when flying cross country. The tachometer is counting the right numbers at cruising speeds. When idle, or at lower rpms, your times counted at the tach differ from what is actually flown. Hartmut
To: [EMAIL PROTECTED]: [EMAIL PROTECTED]: Wed, 30 Jan 2008 17:42:34 -0600Subject: Re: [ercoupe-tech] Propeller/Fuel Burn I don't want to break the propeller thread. So I'm Calling this Propeller/Fuel burn. Hope it works. I have a 415-C, C-85, O-200 crank. I never get better than 6 gph. If we're doing touch and goes, etc. I may get 7 gph. I'm using tach time, is that right? Randy Hougham NC87384 ----- Original Message ----- From: Larry Snyder To: Albert Flora Cc: ercoupe-tech Sent: Wednesday, January 30, 2008 7:25 AM Subject: Re: [ercoupe-tech] Propeller I rarely fly that high, usually 4500 or 3500, but at those altitudes I burn 4 1/2 to 5 GPH at 2400. When I first got my plane back from the engine overhaul, I flew it for a while at 2200 or so since that was the normal speed for the C75 and it "felt" right. Then I got 4 or less. Of course, I was moving pretty slowly, too! Larry Snyder N99340 On Jan 30, 2008, at 5:35 AM, Albert Flora wrote: Larry, What is your fuel burn at 5500MSL or there about @ 2400 RPM with the 71-50 prop? Al Flora ----- Original Message ----- From: Larry Snyder To: ercoupe-tech Sent: Wednesday, January 30, 2008 4:56 AM Subject: Re: [ercoupe-tech] Propeller Albert, I have the same engine and have a 71-50 prop. I get terrific climb performance (400-500 FPM loaded in hot weather) and I cruise at about 110-115 MPH at 2400 RPM/ Larry Snyder [EMAIL PROTECTED] On Jan 30, 2008, at 4:20 AM, Albert Flora wrote: Tom, The engine is not an O-200. It is an C-85-12 having the O-200 crank STC. The engine is complete and on the coupe but has yet to be run. The engine was overhauled by Premium Aircraft Parts LLC of Ft. Smith, AR. The old engine that was on the coupe was a core exchange for this one. Thank you for your help, A new couper yet to fly, Al Flora N94748 Hayward, WI (HYR) ----- Original Message ----- From: T Graziano To: Albert Flora Sent: Tuesday, January 29, 2008 11:20 PM Subject: Re: [ercoupe-tech] Propeller Does your 'coupe have the O-200 installed or just an STC for installing one?.....or is it the STC to install an O-200 crank in a C-85 engine? Thanks. Tom ----- Original Message ----- From: Albert Flora To: [email protected] Sent: Tuesday, January 29, 2008 7:26 PM Subject: [ercoupe-tech] Propeller What would be the best propeller for my 1947 415-CDN94748 Ser# 4859?It will be used most for cross country flying.The engine is an 0 time C85-12 with an 0-200 STC.I looked it up in A-718 and it made no mention ofthe 0-200 STC. I am a new cooper with 0 time in acoupe and need your help.Al FloraN94748Hayward, WI _________________________________________________________________ Shed those extra pounds with MSN and The Biggest Loser! http://biggestloser.msn.com/
