Thanks Larry, running a 60x74 stock 0-200. On Fri, Aug 25, 2023 at 3:57 PM Phillip Matheson via KRnet < krnet@list.krnet.org> wrote:
> I have a Thompson 60 x 70. But it too much for my engine. It is getting > 2300 flat out straight and level. Only 2100 on climb > Still sorting another prop to try > > Phil > > Sent from my iPhone > > > On 26 Aug 2023, at 05:54, Larry Flesner via KRnet <krnet@list.krnet.org> > wrote: > > > > > >> On 8/25/2023 12:21 PM, William Walsh via KRnet wrote: > >> Guys I bought Gerry Hamiltons kr 1.5 and the prop that he had I think > will not give me full RPM but close. Any one running and 0-200 please > advise. Looking for middle of the road. Thought about going with the > adjustable Sensenich prop and figure out the best pitch however at $3800 I > think I’m gonna look at different directions. Live in WA State if any peps > are close. > >> > >> Thanks in advance for your help > >> William > >> > > > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > > > > When you say you "get close" to full RPM, what is the number? If you > can get anywhere near 2750 RPM at full throttle level cruise and don't > intend to fly off any "extremely short" runways I'd leave well enough > alone. The prop I'd recommend is no longer available so I can't advise on > a prop. I put 800 hours on an Ed Sterba 60X68 that was supposedly > re-pitched to a 64P but I couldn't tell any difference. With the 0-200 you > can get a nice economical cruise at 2450 to 2500 rpm on 5 to 5 1/2 gph if > you lean and can expect a long engine life. Put on a finer pitch prop and > go cloud busting at 2700 or 2800 rpm and burn up to 8 gph. Your engine has > a determined number of rpm's in it's life time. Why use them all on a > limited number of flights? > > > > A bit more info with numbers, prop maker, pitch / diameter might help > others to offer better advise than I'm giving. > > > > Good luck........................ > > > > Larry Flesner > > > > -- > > KRnet mailing list > > KRnet@list.krnet.org > > https://list.krnet.org/mailman/listinfo/krnet > -- > KRnet mailing list > KRnet@list.krnet.org > https://list.krnet.org/mailman/listinfo/krnet >
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