REFLECTOR: Props ...
Scott Derrick
scott at tnstaafl.net
Fri Jun 24 07:30:31 CDT 2005
Yes it is an RG.
170 KTAS at gross, 175 with just me in it.
Scott
Jim Sower wrote:
> Scott,
> Where'd you get 180 ktas? You got an RG? If not, I'm humiliated.
> Mine (w/o wheel pants) won't do a yard over 150 kts. I have to file
> 145 or 140. It's embarrassing. Looks like I might have to bite the
> bullet and do all that work and install a 220 hp Mazda.
> Love the engine, hate all that work ... Jim S.
>
> Scott Derrick wrote:
>
>> Jim,
>>
>> "I had" the same engine, rated 200HP. I was running a Catto, 64x74.
>> I would get 2350 static, and WOT 8000, 2800 RPM, 180 KTAS. That was
>> with a LSE ignition which I think added to my performance.
>>
>> I never cruised at 2800, I would normally cruise at 2700-2750, at
>> apx 175 KTAS, 75 LOP.
>> You could cut a 1/2 inch at a time, off of it, and see how it
>> increases your RPM? 2550 WOT is definitly over propped. You get that
>> static up to 2350 you'll cut 500+ ft off your take off roll. Your
>> cruise speed would be less because of your bigger wing.
>>
>> Scott
>>
>> BTW, my prop with a Saber 8" extension is for sale $1500 + shipping.
>> 300 hours. I'll put a new coat of PPG on it before shipping. You pick
>> the tip color.
>>
>> Jim Sower wrote:
>>
>>> 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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