About the turn of the century the Europa Florida US office tested various
engine/prop combinations. One conclusion was that the 914 fixed prop
combination had a signicant issue at higher altitudes. The 914 having a
critical altitude of 16Kft resulted in needing to reduce throttle setting to
prevent prop overspeed as one climbed into the teens. It seems to me that
if you are not going to go high or don't have density altitude problems, you
are better off with a 912.
Bob Lindsay
914/Whirlwind XS Monowheel
----- Original Message -----
From: "Tony Renshaw" <tonyrenshaw268@gmail.com>
Sent: Saturday, August 27, 2011 12:34 AM
Subject: Europa-List: 914 Prop Question
>
> Its been a long while since I've had to think much about props. In truth I
> still have a lot of building to go before I have to worry again. I'm
> nevertheless wondering if more learned people would care to comment on
> whether a fixed pitch prop, maybe a Catto prop, could work on a 914. I
> know the pitch of the prop would need to be determined to suit the style
> of flying I prefer, and lets say that is to go as fast as my
> engine/airframe combination will allow, at 75% power. To that end I reckon
> my takeoff performance will be compromised, but recent video of Bob Catto
> speaking makes me believe it might only be in the order of a couple of
> hundred feet. If I can deal with that, well what other limitations are
> there that haven't come to mind yet? Does anyone know of a builder of
> anything that has strapped a fixed pitch prop to a 914? I don't and thats
> why I'm asking. There might be a bunch, I just don't know them. Also,
> there might be some issues at altitude, although simplistically !
> I believe the prop works in an IAS environment so maybe it doesn't matter.
> I think there is probably even issues of aerodynamics that might be wrong
> with that last statement, so I'm happy to read whatever someone can
> contribute.
> Thanks
> Reg
> Tony Renshaw
>
>
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