Chris Cowman wrote:

Paul, what kind of fuel burn is Klause getting with his
Long?

Chris
microcosman.com

He claims 50 mpg at 200 mph so that is 4 gallons an hour.
My guess is that is around 18,000 feet as he uses
O2.

That means his airplane is flying at  200 MPH on only
about 60 HP.  Possible I guess.

200 MPH is 293 FPS. Assume a prop eff. of .85 so 
60 engine HP  means 51 net thrust HP. 51 times
550 = 28,000 pound feet per second HP. Divided by 293 FPS =
96 pounds of drag. Dynamic pressure at 
200 MPH is 104 pounds per square foot at sea
level. Or half that up where the density is half.
So that gives him a flat plate area around two.
Quite possible.

Paul Lamar
 
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