-Ed Klepeis wrote:
Dear Paul
If Marty Hollmans prop designs fly like his so called super
rotor
craft blades I would caution the buyer beware.
Regards
Ed
Not good results eh?
Paul Lamar
-Matt Prather wrote:
I have had questions about Hollman too.. He has an aircraft design
book in which he claims that the aerodynamic drag of a canard type
airplane is more than a conventional configuration. He demonstrates
this by providing an analysis with a valid center of gravity location
for the canard model, but then runs the numbers on the conventional
configuration based on a lifting (unstable) tail loading (cg behind MCA).
I don't understand that, but it might explain why the original (small tail)
Lancair 360's are such a handful. I don't think Hollman had much
involvement in the Legacy, and from my estimation, it is a much better
airplane (though that may be a coincidence).
That I am a canard owner suggests I might be biased.. :) Further, I
am an electrical engineer, not an aero...
Regards,
Matt-
VE N34RD, C150 N714BK
I would say the excellent performance of the canards certainly support your conclusions.
IMHO they do have their warts but that is not one of them.
Some of the lift on the wing is used to cancel the required down force on the tail
on a conventional airplane.
Paul Lamar
The prop program in Hollman's book was not written by him. I agree his
comments in the past about canards were the ravings of an idiot.
Perry
On the other hand if you compare landing speed for landing speed it is hard
to beat a conventional airplane with Fowler flaps. Not easy to put Fowler
flaps on a Rutan canard. to get the same landing speed a canard needs a lot more
wing area and that is a lot more drag at high speeds.
Paul Lamar
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