REFLECTOR: Molding a P-51 Scoop

[Jim Sower]

Isn't that why God gave us Vortex Generators? This constitutes an 
enormous increase in cooling drag that seriously compromises the benefit 
of a turbo. If intercooler only needs 20 sqin or so, give it 20 sqin 
that works (how big are the armpit scoops that cool half an engine?) and 
get lots better performance.

Isn't 66 sqin more than the XL NACA scoops? For an INTERCOOLER? ...Jim S.

Al Gietzen wrote:

> Isn't 66 sqin nearly the size of the engine cooling inlet? Sounds like
>
> a lot. I would have thought maybe 30% of that would do.
>
> Keep in mind that back at the cowl the turbulent boundary layer is 
> approaching 2” thick, so if the scoop is not separated from the 
> fuselage (BL diverter) the average airspeed in the boundary layer may 
> be something like half to 2/3 the freestream velocity.
>
> Al
>
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