REFLECTOR:CONFUSION

[velocityxlfg]

One more thing to keep in mid about constant speed props is complexity one
more thing to watch and maintain.
----- Original Message -----
From: "Scott Derrick" <scott@tnstaafl.net>
To: <reflector@tvbf.org>
Sent: Wednesday, July 16, 2003 9:23 AM
Subject: Re: REFLECTOR:CONFUSION


> Alan's a good guy and knows a great deal but he's also got an ego as big
> as the state of Florida.  He's very attached to his ideas.
>
> I completely agree that with a IO540 your climb performance will be good
> either way.
>
> But, for all around performance you can't beat a constant speed prop.
> No way, no how.  You can tune a fixed pitch prop to beat a constant
> speed in one phase of flight: climb, flat out, etc..  But your not
> building a racer.  I wish I could afford a CS prop for my Std RG., I'd
> buy it today.
>
> > He recommended a three-blade performance prop made by Performance Props
> > in Arizona.  He said it should be put on a five inch extension and it
> > will fit perfectly with the cowl he designed.
>
> I'd recommend a Catto if your were going fixed pitch.
>
> > He said the fixed pitch also helps with cooling because it can get
> > closer to the big cowl openings on each side of the prop and it will
> > actually ?suck out? air creating a cooling effect.
>
> Maybe, maybe not.  I think this kind of thing requires a 1,000 hours of
> tweaking to get it right.
>
> > He also said that the exhaust pointing straight out the back through two
> > ports (bottom left and right) will actually cause a venturi effect
> > inside the cowl ... which will force cool air to exit around it ? again
> > aiding in the cooling of the engine.
>
> Same comment as above.
>
> Scott
>
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