REFLECTOR: Props ...

Ron Brown romott at adelphia.net
Thu Jun 23 22:08:30 CDT 2005


Jim,

I got the same numbers as you with my Catto 66 x 72 on an IO360 - 200 hp on 
a 173 Elite RG.   WOT at 7500 feet was 168 kts true and only 2500 rpms.

I sent it back and Craig repitched it for 66 x 70".  Now I get 2350-2400 
static, and 2700+ at WOT, with a speed of 165 knots at 8500 feet.

Taking off with the repitched prop felt like starting in 2nd gear instead of 
high gear.  Much snappier take off and climb and not much loss at cruise - 
just turns more RPM.  I'm happy!

Ronnie

----- Original Message ----- 
From: "Jim Sower" <canarder at frontiernet.net>
To: "Velocity Builders list" <reflector at tvbf.org>
Sent: Thursday, June 23, 2005 10:41 PM
Subject: REFLECTOR: Props ...


> All,
> I am running an angle valve IO-360 with a Catto 66x72 on my 173-FG.  I 
> find I'm overpropped about 200 rpm,.  I get 2200 - 2250 static and 2500 - 
> 2550 WOT at >8000'.  I think I'd be a lot happier with closer to 2400 - 
> 2450 static and 2700 or more at 8000'.
>
> Who's got a similar engine, what kind of prop are you using, what static 
> and cruise (>8000' WOT) rpm are you getting?  I think my engine's pretty 
> sorry, but I don't have any other data points from similar engine prop 
> combinations.
>
> Thanks in advance ... Jim S.
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