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Perry Mick wrote:
On Wed, 21 Apr 2004 20:19:12 -0400, Bulent Aliev wrote
On 4/21/04 12:44 AM, "Perry Mick" <pjmick@mail.viclink.com> wrote:
Bulent:
Are you looking for a wood prop or composite? Al's method is wood, mine
is
composite. I think with your HP you would need a prop similar to what
I've
built for Cosman, but it still needs to be tested.
Hi Perry, I want to build one like Al Wick and Phil Johnson did. Wood / composite prop. This way I van get some initial performance numbers for the final prop. I would like to have one like Cosmanšs,
but I can wait to be tested. In the mean time Išll have something to start with. Bulent
Tell me:
your engine HP at X RPM sealevel
redrive ratio
cruise RPM, and desired cruise speed at that RPM
number of blades, 2 or 3 (probably 3)
prop diameter (limited by rotation angle on a pusher)
I can work up some numbers for you to build to, blade pitch and chord.
Perry
Homepage: http://www.flyrotary.com/
Archive: http://lancaironline.net/lists/flyrotary/List.html
If I may ask, how do you re-pitch a composite prop? I can see adding a layer of glass, but can you sand it thinner or cut the tip? Both options seem like they would damage fibers, and are therefore a no-no.
--
http://www.ernest.isa-geek.org/
"Ignorance is mankinds normal state,
alleviated by information and experience."
Veeduber
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