At 07:13 AM 6/14/2017, you wrote:
I watched the EAA video on fuel flow test and
was trying to find the BSFC or maximum fuel
flow rate for the VW engine with a Posa
carburetor. If I use the default of .55 in the
formula, I get a fuel flow rate of 6.8 GPH
which I know is excessive. From reading some of
your pilot reports, IÂ am suspecting a fuel
flow rate of about 3.5 GPH. I would appreciate
some feedback on those familiar with the
Revmaster 2100D. Thanks Luis R ClaudioDallas, TexasKR2S
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Accepted practice is a flow rate one point five
times the maximum engine requirement in the worst
possible flight configuration, generally nose
high climb. You can't have too much fuel flow
capacity unless you are over powering your carb.
Another rule of thumb that works well on our type
of engine is that fuel burn will be 1/2 pound of
fuel per horsepower per hour. My 0-200 for
example at 65 percent power = 65/2 =32.5 pounds /
6 ppg = 5.41 gph, very close to actual.
Just remember, silence in flight is for sail planes...............
Larry Flesner
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