That makes sense. I am a stickler for not having a draggy plane, plans already to put the sissors fairing back on, wheel pants going on, venturi horn comes off etc. I have the round windshield, somewhere I heard that is even a help too. Anybody have any more ideas to make it slide thru the air easier? I have even found that a good coat of wax helps.
--- In [email protected], "Ed Burkhead" <e...@...> wrote: > > > Besides what Hartmut said, a heavy Coupe with a cruise prop (7151 or > 7152) may not be able to get up to cruising speed due to load and > insufficient horsepower to turn that pitch of prop adequately. > > While a 1260 pound Coupe might cruise 112 mph with a 7152 prop, a 1400 > pound Coupe may only cruise at 90 mph at near full power with the same > prop. > > So, if you want the fast cruise, either you need the horsepower to do it > or a plane light enough to do it with the engine/prop you have. > > Each airframe, just like each boat/ship hull, has a range of speed it > can reach with moderate power. Past that speed, the power requirements > go up steeply. > > Ercoupes and Forneys get to that elbow in the graph somewhere around 110 > mph. The guy who mounted a 135 horsepower engine didn't go much faster > than that - he just got humongous climb and fuel consumption (and a very > ugly plane). > > Mark in Wisconsin (who used to work for a previous owner of Skyport and > who designed the 30 gallon fuel tank system) is one of the few who has > made a higher power installation effective and he really worked at it > intelligently. > > Me, I was happiest with my C-85 engine and a 7146 prop that gave me > adequate climb even though my 2400 rpm cruise speed was only 100 mph. > > Ed >
