F. Marc de Piolenc wrote:

I think we are getting things a little confused here. The fan tips
are what we are concerned about and the sudden drag increase as
they approach mach one.

I was referring to the FAN tips, but you will note the next time you get
on an airliner that BOTH the core-engine inlet and the fan inlet are
diffusing. If its okay for the fan to be supersonic, the logical thing
to do would be to have the compressor inlet diffusing, but the fan inlet
accelerating to get an over-unity mass flow augmentation factor.

Marc de Piolenc

I will have to research this further Marc. I have a lot to learn.
There must be something there that we can apply to a rotary powered 
ducted fan design that will work over a 200-250 MPH speed range.

Perry will soon have more data for us I am sure.

Thanks for all your input. I will try to buy the book sometime
this week. It would be nice if I could drive over there and pick
it up. When are you coming back?

What do you think of my inflatable intake lip idea?
 
Paul Lamar
 
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