Has anyone flown a 65 hp Champ with a Sensenich M76AK-2-40 climb prop?
The prop is legal, but would the pitch be a problem? Obviously, I'm not too concerned about speed, but don't want to over rev the engine. Should I have the prop repitched?
Thanks.
Sensenich Metal Climb Prop ?
Re: Sensenich Metal Climb Prop ?
That's such a tough question, just because it's a 65hp doesn't mean all 65s are equal.
Here's an example, my 65 chief would only turn 2000rpm with the 74-44 it came with. I had it retwisted to 74-42 & it spun up to 2250-2300rpm, no loss of speed & much better take-off. I then built an exper T-Crate. While the T-Crate's prop was away getting twisted (it came with a 74-45
) I used the Chief prop, granted the 65 Ts motor had a ventura & jetting change, it was still not that much more than 70hp. It would spin that 74-42 to 2450 & really jump off the ground. When I put the Ts original prop back on, now a 72-42 it would spin to 2500rpm performance improved again.
So back to the original question
"Should I have the prop repitched?"
My advice is put it on & try it, I think it might be the cats as...butt, especially if your working off short fields or tend to fly 2 up a lot.
All in MHO!!! & worth every penny you paid
Let us know how you make out.
Here's an example, my 65 chief would only turn 2000rpm with the 74-44 it came with. I had it retwisted to 74-42 & it spun up to 2250-2300rpm, no loss of speed & much better take-off. I then built an exper T-Crate. While the T-Crate's prop was away getting twisted (it came with a 74-45
) I used the Chief prop, granted the 65 Ts motor had a ventura & jetting change, it was still not that much more than 70hp. It would spin that 74-42 to 2450 & really jump off the ground. When I put the Ts original prop back on, now a 72-42 it would spin to 2500rpm performance improved again.So back to the original question
"Should I have the prop repitched?"
My advice is put it on & try it, I think it might be the cats as...butt, especially if your working off short fields or tend to fly 2 up a lot.
All in MHO!!! & worth every penny you paid
Let us know how you make out.
46 Chief Serial #11AC-80
originally N86275 now C-GQHP
46 Taylorcarft in rebuild
originally N86275 now C-GQHP
46 Taylorcarft in rebuild
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sevenacjack
- Posts: 35
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- Location: grass strip abilene tx
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Re: Sensenich Metal Climb Prop ?
I have a 7AC with a cont. A65 that I overhauled to a A75 and I had a sensenich W72CK44, it didn't do much,cruise was ok,but I expected more, so I got a sensenich W70DK40, climb was good but cruise sucked, so I found a sensenich metal 74DK44-4 cut down to 72" dia. put it on the champ and it was like magic! it performed great in climb and cruise (90-95) I called sensenich at their metal propeller plant in Pa. and spoke to one of their engineers and told him the "prop-story" and he said the metal prop was ok, it was certified for a A65, so I put the timing back to 30-30 (thats just 1 degree each way) and no difference in performance, I still had the A65 engine data tag, and without a A75 data tag (plate) from contenental factory it's still a A65-8. btw, there are two 85 hp 7AC's on the field here, my champ can climb and cruise right along with them. FWIW.
Re: Sensenich Metal Climb Prop ?
Thanks guys. I'll install it in the near future and let you know what kind of performance I get.