s09.mmcdonald
FRIEND
@Steve Pierce what did you learn? What's the latest word on Acme's approval and timeline?
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Sensenich Ground Adjustable Prop
- Thread starter FullThrottle
- Start date
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Steve Pierce
BENEFACTOR
Graham, TX
Acme got it all done and now the FAA has moved the finish line.
Steve Pierce
BENEFACTOR
Graham, TX
I did, I used the Type Certificate for the prop which approves it on the O-320, the STC for the prop on the Super Cub with an O-360 including Instructions for continued airworthiness, Field Approval Checklist and plead my case. Come to find out my Primary Maintenance Inspector and I went to A&P school together more than 30 years ago and he has common sense.
AZinAK
FRIEND
I'd love to install one on my PA-12 160. What do you think the likelihood is considering the STC is getting "close" to approval for the O-320?
Steve Pierce
BENEFACTOR
Graham, TX
The prop is Type Certified for the Lycoming O-320 and O-360 TC # P00023AT. There have been a couple of field approvals on Pacers as well. https://www.sensenich.com/documents/
BritishCubBloke
SPONSOR
Bellingen, NSW, Australia
Sorry, does this mean we can install it?
skywagon8a
MEMBER
SE Mass MA6
That means it is approved on the engine, not necessarily the PA-12.
Steve Pierce
BENEFACTOR
Graham, TX
Data that can be used to obtain a field approval.
Utah 12 Driver
SPONSOR
Jax Beach, Florida
Kevin then you're the man for the job! or so I've been told!
Colorguns
PATRON
Bloomfield NY
Yes it will, i got a spacer from Saber for my 0360 with the Charlie Center conversion as it needs it to clear the cowling. The blade will then set at closer to 1100 than 1000 and you can hand prop it really easy there.
Doug
Steve Pierce
BENEFACTOR
Graham, TX
I just delivered a prop to a friend who had set up his Javron cowl for a Catto prop and needed a spacer and is getting one from Saber. He said it was no issue.
Don was telling me yesterday they're using a tile cutoff wheel to avoid over heating the composite... was thinking like you were, band saw.
cubdriver2
FRIEND
upstate NY
4.5 abrasive cut off wheel works great. A few drops of CA ( super glue) seal the end
Glenn
Steve Pierce
BENEFACTOR
Graham, TX
Why would you want a shorter prop. Just a touch better than the Borer.
Steve Pierce
BENEFACTOR
Graham, TX
One of the engineers told me they used a band saw.
Steve Pierce
BENEFACTOR
Graham, TX
That was said as kinda a joke. It degraded performance for sure but was still just a bit better than an 82" Borer.
Colorguns
PATRON
Bloomfield NY
Make sure you set it up so it stops at 1100 not 0900 or you will have a hard time hand propping it.
Doug
It is my experience that a shorter prop can pull a bit more pitch for the same static RPM and allow for better climb and faster cruise -- often with very little loss in take of performance.
For example a 52 pitch Sensenich/Metal prop will make my cubs climb rate the same at 85 MPH as my borer does at 75 MPH and gain 10MPH in cruise
For all around a 78 might be the sweet spot.
For example a 52 pitch Sensenich/Metal prop will make my cubs climb rate the same at 85 MPH as my borer does at 75 MPH and gain 10MPH in cruise
For all around a 78 might be the sweet spot.
Stephen P.
MEMBER
Kodiak, AK
Doug, thanks for the reply. I'll post a picture soon, but I've installed this prop on my Charlie Center converted PA-18 without the spacer and there was plenty of clearance with the cowling. Albeit, that spacer you purchased looks pretty trick. FYI, I did not install it with the backplate/spinner.
Even a new cub driver like myself can tell the difference once 25 lbs is removed from the nose and man does it spool up/down quick. The starter is really going to take a beating with the loss in inertia during startup. Is anyone else seeing a labored start once switching to a lightweight prop? FYI, just installed a new SBS J-16 w/ same results.
Initial real world performance gains for those on the fence............. I removed a McCauley 1A200/DFA8243 and have seen similar to improved takeoff performance and an increase in 5-10 MPH (cruise) with the Sensenich set at a 45 pitch. The weight alone has made a huge difference on landing. With the throttle chopped the old prop would generally make the nose drop out from under me just prior to touch down, but that is now gone.
After removing the old prop and battery, my cub is now 41.5lbs lighter!! Money may not always buy happiness, but it can sure buy increased performance.
Stephen
Even a new cub driver like myself can tell the difference once 25 lbs is removed from the nose and man does it spool up/down quick. The starter is really going to take a beating with the loss in inertia during startup. Is anyone else seeing a labored start once switching to a lightweight prop? FYI, just installed a new SBS J-16 w/ same results.
Initial real world performance gains for those on the fence............. I removed a McCauley 1A200/DFA8243 and have seen similar to improved takeoff performance and an increase in 5-10 MPH (cruise) with the Sensenich set at a 45 pitch. The weight alone has made a huge difference on landing. With the throttle chopped the old prop would generally make the nose drop out from under me just prior to touch down, but that is now gone.
After removing the old prop and battery, my cub is now 41.5lbs lighter!! Money may not always buy happiness, but it can sure buy increased performance.
Stephen
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