Thanks for your reply. If the 87 takes more bite it still overspeeds at full throttle?I flew behind an 87 inch prop for more than 800 hours. Static was 2150 rpm’s and 90 knots was 2500 on take off. At higher altitudes you still were not able to use full throttle. If I had the choice, I would choose 87 inches.
Thanks for your reply. If the 87 takes more bite it still overspeeds at full throttle?
There is a specific density altitude for each pitch value where the RPM will be limited to 2700 at wot. It all depends on what you want that altitude to be.Thanks for your reply. If the 87 takes more bite it still overspeeds at full throttle?
TksThere is a specific density altitude for each pitch value where the RPM will be limited to 2700 at wot. It all depends on what you want that altitude to be.
I’m basically at sea level and all my flying is 8K or less and no short strips. Is there a chart some where? Tks. R
I had Sensenich Gainesville, Ga repitch to an 87 on my RV-7 and picked up about 8mph. no issues72FM8S16-1-85 On 180hp RV-8. Does anyone have experience with the 87 pitch? Speed gain? Loss of climb performance? All opinions appreciated. Tks
I had an 85" for several hundred hrs on my 180hp RV-6. I couldn't afford a CS at the time. A friend let me use his 87 to do some back to back testing. Totally agree with Randy, go with the 87.I flew behind an 87 inch prop for more than 800 hours. Static was 2150 rpm’s and 90 knots was 2500 on take off. At higher altitudes you still were not able to use full throttle. If I had the choice, I would choose 87 inches.
The RV-4 is lower in drag than the side-by-side RVs so the optimal prop for what a particular person wants in performance will not necessarily be the same between the two.Had an 85” on my O-360. RV-4. Even at 8,000 ft could not go close to WOT. Agree with going 87”.
Roger. I was responding to the OP, who has an RV-8. I thought they (the 4 and the 8) were very similar in drag profiles, and have even heard the RV-8 has less frontal drag than the 4 (and I'm curious to know if that's true).The RV-4 is lower in drag than the side-by-side RVs so the optimal prop for what a particular person wants in performance will not necessarily be the same between the two.