At 03:34 PM 1/7/2009, Jack B. Hart wrote:
>...With a pusher propeller and the engine mounted so
>that the carburetor is above the wing the carburetor inlet is being fed with
>lower static air pressure than can be found below the wing....
>...A dynamic air pressure scoop around the air filter
>seemed to be the way to go....This
>should more than make up for the 1.0 to 1.5 inches of water air filter loss
>that was found under cruise conditions...
About 0.14 inches of mercury (1.9 inches of water) at 55 knots, or less
than 1% of 1 atmosphere; 1/2HP for a 50HP engine (since output power is
roughly proportional to intake air pressure)... seems unlikely it'd be
noticeable.
Can't hurt though, unless it comes loose and goes through the prop...
-Dana
--
In some cultures what I do would be considered normal.
