Mesazhi #10316 i Listės sė E-mailave flyrotary@lancaironline.net
Nga: DaveLeonard <daveleonard@cox.net>
Lėnda: RE: [FlyRotary] Re: Warp was Re: Turbos from the land of Oz
Data: Tue, 10 Aug 2004 12:38:58 -0700
Pėr: Rotary motors in aircraft <flyrotary@lancaironline.net>
Thanks for the input Grant.
Dave Leonard
Pros: The ground adjust capability and method are good.  It's nice to be able to dial in how much prop you want.
 
Nicks and dings in the prop are easily fixed with a glob of epoxy and some sandpaper.
 
The prop construction and retention in the HP hub seem pretty positive.
 
Cons:  Doesn't give the performance I was expecting.  After reading Mr. Lipps' article in the last Contact issue, I suspect the airfoil isn't very efficient, as he pointed out in the article that any prop with a flat bottom and a sharp leading edge has poor efficiency, and the Warp Drive has both.  'Course, I do have to add the caveat that I fly out of an airport at 5440' elevation.  The one time I tried it at a 1000' elevation, it was like a completely different airplane.
 
The composite construction is very sensitive to nicks.  If you go the Warp Drive route, make sure you get the nickel leading edge protection.
 
Can't say much about the taper on the blades - my cruise speed seems less than other Zodie drivers, but that may be due to a general need for aerodynamic cleanup and the extra weight of the Continental.
 
Grant Schemmel
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