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Sensenich Ground Adjustable Prop

Yes, but what's with the tiny tires on "Double-Oh-Six" in the back corner ;-)? The Sensenich prop should work great on a Scout.

Thanks. cubscout
 
Concluded the landing test yesterday with 6 landing starting at dawn. Will schedule the noise testing in a few weeks and we are hoping to use my airplane since I have approval for the prop and would save switching the airworthiness certificate from standard to experimental which involves a DAR coming from Waco twice to do. I will have to take off and climb over the microphone at a certain altitude. This is the last step and hopefully the data will get processed and submitted and an STC granted soon.
This is the test airplane with the ground adjustable prop.
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Flight test briefing with the FAA and Sensenich. Alley was the supervisor.
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The crew. I learned a lot about props from Jon Bristol and Steve Boser at Sensenich and a lot about test flying procedures from Tom Bryant. Bob Brock kept all the i's dotted and t's crossed.
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A friend of mine has a PA 12 with an O320 on the front and is looking for a prop. When this prop is certified for O 320 will it only be for the PA18 or will the certification include other piper taildraggers with similar type certification PA11-PA12-PA18?
 
Concluded the landing test yesterday with 6 landing starting at dawn. Will schedule the noise testing in a few weeks and we are hoping to use my airplane since I have approval for the prop and would save switching the airworthiness certificate from standard to experimental which involves a DAR coming from Waco twice to do. I will have to take off and climb over the microphone at a certain altitude. This is the last step and hopefully the data will get processed and submitted and an STC granted soon.

Just curious, but why wouldn't the noise test be conducted in the same configuration (same aircraft) as the other performance testing?
 
A friend of mine has a PA 12 with an O320 on the front and is looking for a prop. When this prop is certified for O 320 will it only be for the PA18 or will the certification include other piper taildraggers with similar type certification PA11-PA12-PA18?
The STC will be for the PA18 with an O-320 engine installed both 150 and 160 hp. The prop is type certified on the O-320 and O-360 engines and that data along with the STC data for the PA18 can be used to get a field approval or DER approval of the prop on other aircraft. It has gotten approval via that route on a 180 hp C172 converted to tail wheel and on a Pacer. I was considering pursuing an STC for the Pacer but having seen what this project took I don't think I have the time, patience or money to do it.
 
Just curious, but why wouldn't the noise test be conducted in the same configuration (same aircraft) as the other performance testing?
The performance data has to be interpolated to come up with the altitude at which the altitude the airplane has to climb over the microphone on take-off. The aircraft would again have to be put into the Experimental category and then back to standard which takes a DAR two trips, expense etc. If I use my airplane which has approval to run the prop it can be one trip to prove compliance.
 
The performance data has to be interpolated to come up with the altitude at which the altitude the airplane has to climb over the microphone on take-off. The aircraft would again have to be put into the Experimental category and then back to standard which takes a DAR two trips, expense etc. If I use my airplane which has approval to run the prop it can be one trip to prove compliance.

Ok, thanks. I was assuming the test aircraft would be dedicated to the program and stay experimental until the program was completed.
 
Problem if you leave the airplane in Experimental R&D/Show Compliance is based on 91.319, it can ONLY be used for the purpose for which it is Certificated. If it stays Experimental, it can only be used for the testing and nothing else.


Sent from my iPad using Tapatalk
 
That is why it was returned to standard and to it's owner. We never know how long these things are going to take.
 
Hey Steve:

Do you have any experience with the 3 blade 78” STOL prop? I debating whether to get that or the 82” two blade. It’s for a Carbon Cub EX1 I’m building that will have the CC363i engine.

Thanks,
Gregg
 
Hey Steve:

Do you have any experience with the 3 blade 78” STOL prop? I debating whether to get that or the 82” two blade. It’s for a Carbon Cub EX1 I’m building that will have the CC363i engine.

Thanks,
Gregg
I do not. I will ask about it though.
 
I see on the Sensenich website that they have a ground adjustable prop for lower hp engines. Anyone here heard anything about those, good, bad, or otherwise? I'd like to try one on my C90.
 
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There is a good prop coming for the C90. Molds are made but be a year or so. C76AF is available now.
2F0K6 C76AF: 76" diameter in a 2 blade hub, wide blade to meet inertia requirements for C-90/O-200


2F0K6 C78CFF: 78" diameter in a 2 blade hub, new design (mold should be getting cut within the next couple of weeks), composite layup redesigned to meet C-90/O-200 inertia requirements, anticipated ~100-150 RPM higher static engine speeds for similar cruise settings



C78CFF-2 is the tip trimmed to 76" diameter.
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I've been watching this Sen 2FO prop for my C-85 Stroker, a C-90 equivalent. It will revolutionize the performance especially on floats.

Steve, what are the inertia requirements mentioned above?

Gary
 
Got one on a 0-235. Great performer on floats, wheels, wheel skis. The water takes a little finish off but otherwise no problems at all.

Jim
 
Different pitch pin markings?

Pitch pin question:
I have the 2GOM8 C82BGF installed on a PA-18-150 O-360. Pitch pins marked 2-7. Chart from included instructions below.
I also have the 2GOM6 C82F installed on a PA-18-150 O-320. Pitch pins marked 0-5. No chart included for PIN number to pitch. Do pins 0-5 = 2-7 and are the corresponding pitches the same??
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Pitch pin question:
I have the 2GOM8 C82BGF installed on a PA-18-150 O-360. Pitch pins marked 2-7. Chart from included instructions below.
I also have the 2GOM6 C82F installed on a PA-18-150 O-320. Pitch pins marked 0-5. No chart included for PIN number to pitch. Do pins 0-5 = 2-7 and are the corresponding pitches the same??
View attachment 63252
Pins are 0-7 incrementally increasing pitch. Same blades, different hub. There will be a chart when the prop for the PA18-150/160 is STC'd I am almost certain.
 
Pins are 0-7 incrementally increasing pitch. Same blades, different hub. There will be a chart when the prop for the PA18-150/160 is STC'd I am almost certain.

pins are stamped 0-5. But I get it.
thanks much. I assumed they were the same otherwise.

best, Brett D3F24E7F-527D-4EF7-8C72-9BEE09DA501A.jpg
 

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Looks like we will be able to use my airplane for the noise testing and hoping to do that before Thanksgiving. From what I know that is the last step in obtaining the STC.
 
I just broke down and got an other borer prop for the ski flying season -- just cant wait any longer.
 
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