Paul wrote:

That is the problem in a nut shell. You are between a rock and a hard spot.
If you go smaller on the duct to get more RPM and power the disk loading goes
up and the thrust efficiency goes down. You need a gear box to exit this
viscous circle.

Russell Kent wrote:

"Viscous circle" ??
Is that a Freudian, or does the air actually get *thicker* as the props go
supersonic?

Russell Kent

That is the problemo with speeling czeckers they are too stupid :-)
Like me.

Paul Lamar
 
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