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On Wed, 21 Apr 2004 20:47:50 -0400, Ernest Christley wrote
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
You are right, I wouldn't repitch a composite prop. I would just build another one. I was asking for information from Bulent so I could work up some numbers for him to build a new prop to.
Perry
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