Paul,
 
if you could just announce to the group that you are cutting off this thread and that I will be continuing my posts up on the Yahoo group, I would appreciate it. That way those who have been following with interest could jump over there and not be left hanging.
 
 
Regards,
 
Gordon.

If you are interested in this thread please do as it is too far
afield for most people. We need to focus on real world rotary
installation problems here.

Perhaps a smaller fan would work somewhat better
due to more RPM and power but not until you build one and prove it.
Top speed is still proportional to HP cubed. I doubt a smaller
fan would be more efficient. On the contrary history
suggest otherwise due to the less favorable circumference
to area ratio.

The math required to give a reasonable estimate of the
overall ducted fan efficiency is beyond most of our resources.
Even Ferrari hired GE with GE's proprietary software
to do a 3D CFD of Ferrari's Form 1 racing cars.


Paul Lamar ...No rotor no motor.

Gordon,
Which Yahoo group are you thinking about?

Aubrey


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