Wood prop

My McCauley 1a90 got red tagged when I tried to have it trimmed and repitched. I decided to go with a Sensenich wood prop which will be arriving early next week.

I'll post a report of my experience as soon as I get to fly it.

Hi Warren,

I've learned I have the C75 C85 upgrade, the upper limit appears to be 2575 RPM for one. Still digging through all 80 years worth of logs and paperwork! Based on what you were saying earlier, can I go to a wood prop and still have decent performance and climb? I am seeing in the 718 something about having a max static RPM limit of 2100 with wood under the Sensenich section. 

 

Mac 48 & 49 are climb props Higher are cruise props, If you are flying out a short grass field then you want that climb. If you do mostly short flights Makes little dif which prop you have. If you make most longer flights then maybe a higher pitch is called for I Made most 500 +/- trip San Diego to San Josa and gas was affordable then.so I flew mostly all the way in. So go how ever you fly! To me a little faster makes up for a little more gas..

Roger that!

You should be able to use the 71” prop you have on a C-85. I have a 71-49 on my C-85 and I really like that setup.

Like I said, a major reason has been the fact O-200 crankshafts are easier to find. Having flown different planes, the C-85 at 2500 can deliver more speed and climb since you can still swing a 71 inch prop, unlike the O-200 which is limited to 68 inches.