Here it is Doc. You could get in a situation
where the air going into the scoop becomes unstable.
This might occur where the engine air requirements and
the forward motion of the air plane supplys just enough
air to keep up with the engine requirements.
Sort of an air direction oscillation. I am not saying
it is going to happen. I am saying it might happen.

You might have to grind off a small piece of the engine
here and there. The scoop sides and bottom could be
an extension of the plenum.
-- 
Paul Lamar ...No rotor no motor.

Thanks, If the P38 scoop isn't too expensive I will go with that.

Doc Custer
Retired software engineer and sometime Audiologist
Building RV9-A. Fuselage

One advantage of it is it can be a shaker Scoop.
No need for a flex hose between the cowl scoop
and the air plenum. Here is the way Tracy handled it.
He went 217 MPH in the Sun 100 with a slight variation
on this as I recall.

Paul Lamar

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