The sterba 60x68(64?) Prop with the O-200 that 211lf is running after being revarnished with an overhauled engine is about 2500rpm static WOT. Looking at about 2400rpm in a climb at 120indicated and ~800fpm climb full tanks solo, 2750 at 184 indicated WOT in level flight at 4000 feet. I havnt pushed it past 2750 in level flight so it may have some lost potential top end after the repitch. Descent has me pulling back heavily on the throttle to avoid overspeeding the engine or airframe.
Reminder that 211LF has shorter than normal wings and has been smoothed for airflow in most capacity since ownership transfer so YMMV. Typical cruise power for me is between 2300 and 2500rpm yielding about 150-167mph indicated. Economy cruise is 2200rpm at 138 mph and 3.7gph. These are my results over the past 60 hours in the past 2 months with a range of temperatures from 17-70°F ambient temp and a based field elevation of 411msl On Wed, Mar 27, 2024, 2:45 PM Phillip Matheson via KRnet < krnet@list.krnet.org> wrote: > Thanks Larry > The reason I asked, I have had all sorts of low RPM issues. I used > Thompson 60 x 70 = static 2100 wot 2400 > Catto 60x 70 = 2300 and 2500 ( still the best prop) > APP 69x 68 using now 2300 and 2500 if I drop the nose > Any one have any better choices I would love to hear. But of course I > can’t keep buying props. > So now just putting time on the engine and finishing phase one testing > time > Phil > Sent from my iPhone > > On 28 Mar 2024, at 00:12, Larry Flesner via KRnet <krnet@list.krnet.org> > wrote: > > > > > On 3/27/2024 12:03 AM, phillipmatheson--- via KRnet wrote: > > Hi Larry old friend, hope you are well. Good to hear your ex bird is going > well > > Do you remember her prop size, and static RPM and also MAX RPM straight > and level please > > Phil > > > > +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > > 211LF carries a Sterba prop, 60X68. I returned it early on to be > re-pitched as it seemed rpm was a bit low. I couldn't tell any difference > on return. It's been a while but I recall wide open level flight gave 2800 > rpm, static around 2400. Zach has made a few changes as well as engine > work so he could give more current info. > > 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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