#Sensenich propeller serial numbers full
Air fills the shroud before entering the cooler for full frontal effect instead of feeding the cooler through a 3 inch hole in the baffle. I did build an intake shroud and leaned the cooler back 25 yrs ago and lowered the oil temp about 15 degs with that mod. I run a left rear baffle oil cooler position and the rear cyls run within 5 to 10 degs of each other. Hope I am not adding confusion to the thread. Should note that my borer 82-43 ran in the same ranges. range) and the sensenich in the early fall up to 80 degs ambient with same results. Whether that actually makes a big difference or not I don't know but I ran the whirlwind last summer up to 85-90deg ambient air with cht (all 4 in the 380 to 390 deg. I should note that I purposely used a J-3 boot cowl when I built the crow 25 yrs ago because I think getting hot air out of the big side gills is important. Maybe is is true for some but hasn't been for me. This was VERY noticeable and totally unexpected. Of the two trips I made around the patch, of which I have done a thousand times.I had to pull the throttle back ALOT farther and ALOT faster to slow down. Here what was VERY NOTICEABLE(!) the aircraft speed was increased across the board (in the pattern). Takeoff and climb seemed a wee bit slower but.I also installed new 31" tires with extended gear and AOSS and added 44lbs to the bird. I did not use a light tach to check the gauge but I will. Then did a static test and the tach showed 2500 leaned for best power. This prop is soooo lite! I ran the 50% RPM requirement for 10 minutes and retorqued. The engine start was very fast and very quiet. Use a cheap one otherwise you will be chasing numbers. I don't recommend that you use an ultra sensitive digital level. I imagine I will get better at it as I make more adjustments.
It took two of us to set it up with a couple try's to get it in spec. The pitch and tracking set up is a little fiddley at first.
#Sensenich propeller serial numbers install
So as an initial install this where I stayed. But, there is no pin for 42" and 43" pitch was as close as I could get with the pins. I wanted to start with an apples to apples comparison and set it to 42" like the old prop. Sensenich installed with a weight delta of -14.15lbs including hardware and prop spinner. McCauley Pawnee prop (P235AFA8442) 35.05lbs removed. Managed two take-offs before wx forced me back to the hangar so I have little to offer as of yet. I just received my prop and have it installed. FWIW the optical and digital tach on the EM are within 1-2 RPM of each other. I thought I must have had the world strongest 160 narrow deck till I checked the tach out. I have yet to see one that was not 150-250 RPM LOW on the top end so when your mechanical tach says your turning 2500 chances are your closer to 2300. If your running a mechanical tach have it check using an optical or digital tach. I have said it before many times and I will say it again. The difference was enough that after testing the demo prop, I bolted my 82X44 back on for 2 flights then went and plopped my CC down and walked out the door with the new prop and I have never looked back.Īnother benefit of the CF prop is instant spooling and better throttle response when your dragging it in. I have switch back to BW so I need to run the tests again just to see what the #s are on BW versus skis. 35" and we seem to get about 1-2 seconds longer take off, but a few MPH faster than the 82X44 borer. At 34 I can turn it up and get the best take off time, but cruise suffered a few MPH. On my 160 HP pacer I was over 48% shorter on take off times (17.7 seconds with 82X44 to 9 seconds at 34") on skis with a solid ice runway and better climb/cruise.įor what its worth, After a lot of testing I turned down one of the higher pitch pins that I can't use to give me a 35" pin and the 150/160 engine seems to like this pitch the best. Every single plane (not just cubs) showed significant improvement on take off, climb and cruise speed. I made up a spread sheet for the local dealer who was involved in the testing and certification flights and we compared A LOT of different planes doing same day testing with the original prop on the planes then the Sensenich GA prop at various settings.
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