Today's Message Index:
----------------------
1. 09:02 AM - props and engines (Ed Gray)
2. 11:50 AM - Re: props and engines (Tom Jones)
3. 12:41 PM - Re: Re: props and engines (JC Propeller Design)
Message 1
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| Subject: | props and engines |
Looking from comments from any of you Fox builders. I have replaced my 3
blade GSC original prop with a new 2 blade 68 inch Warp Drive with nickel
leading edge. Doing this in preparation for adding floats in the near
future. The Warp pulls great and ups the cruise speed about 8 mph (this is
a 582 on a model 2 with lots of fairings and no wheel pants). But, there is
a vibration in the engine that I never had with the three blade prop. The
blades track perfect and pitch is equal. Blades brand new so I assume they
are balanced. Is this typical for change from 3 blade to 2 blade?
Also, I am about convinced to order the Eggenfellner "Viking" for the Kitfox
4 1200 now building. I like the extra power for floats and the Honda
reliability. Anyone know someone who has ordered one or has an opinion?
Ed Gray, Dallas, K2 582 and K4 building. Do not archive
Message 2
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| Subject: | Re: props and engines |
Ed, I switched from a three blade 68" GSC to a 72" two blade Warp square tip on
a 503 Rotax with 3:1 gear box. The GSC three blade was smooth at all RPM.
The two blade has a slight vibration at 3000 RPM only. At all other RPM it is
smooth.
The two blade improved climb significantly.
--------
Tom Jones
Classic IV
503 Rotax, 72 inch Two blade Warp
Ellensburg, WA
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=313634#313634
Message 3
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| Subject: | Re: props and engines |
Some years ago it was found out if the pitch was set equal at 75% radii on
both or all blades it run smoother, not all blades have the same twist from
there to the tip.
Also make sure every prop you mount on your plane is 100% balanced, get a
balancer!
Jan
www.jcpropellerdesign.com
----- Original Message -----
From: "Tom Jones" <nahsikhs@elltel.net>
Sent: Friday, September 24, 2010 8:47 PM
Subject: Kitfox-List: Re: props and engines
>
> Ed, I switched from a three blade 68" GSC to a 72" two blade Warp square
> tip on a 503 Rotax with 3:1 gear box. The GSC three blade was smooth at
> all RPM. The two blade has a slight vibration at 3000 RPM only. At all
> other RPM it is smooth.
>
> The two blade improved climb significantly.
>
> --------
> Tom Jones
> Classic IV
> 503 Rotax, 72 inch Two blade Warp
> Ellensburg, WA
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=313634#313634
>
>
>
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