Fred:

Thanks for the very thorough posting.

One thing has always puzzled me:  The air enters the small
aperture of the scoop at some fraction of the true air speed...fast.
Then the air moves to a larger cross section, and so it must slow down
(since mass flow is unchanging). That means the pressure rises,
according to Mr. Bernoulli's equation.  All this I believe I understand.

But the problem I have is that the hole in the carb throat
is about the size of the scoop enterance. doesnt the air have to
speed back up again to get through the carb?  So the pressure falls
and we are back where we started.

I'm confused.  Help.

-Jeff Peterson
LCN2...N273CK...90%