Culver Cadet Section > Culver General Discussion

For you Culver guys

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JoeB:

--- Quote from: billpoynter on December 30, 2011, 09:56:16 AM ---I believe that the W70AF-54 would be a good cruise prop for the Cadet with a 90 Franklin. 

--- End quote ---

Hello Everyone,

I just spoke with Sensenich a week or so ago on this topic and the W70AF-5x is not approved for the 90hp Franklin (The TC specifies only up to 80hp for the 'AF').
The approved propeller for the 90hp Franklin engine is a W70AB-5x (My recent purchase has a W70AB-54, unfortunately I can not give any reviews as I have not yet flown behind it)

Best regards,
Joe

Woody:
Okay guys, somewhere in Arkansas there is another complete Culver Cadet hanging in a hanger. I'm told it is not for sale but things do change.  It is in central Ar. somewhere so keep looking.  If I get more info I'll let you know as I don't see the guy that has seen it hanging in the hanger in some small airport.

Paul Rule:
I have flown the Sensenich  -54 prop on a Franklin 90 and found it a little high reving, more like a climb prop.  I think I remember that -54 inches is the maximum pitch for that TC.  Talked with one of the old prop guys Sensenich who told me that there is a manufacturing "plus/minus" on pitch and that if requested, he could make one to the high limit which would be closer to a mid range pitch.

Just a personal observation...  such a clean airframe and wide speed envelope... I have seen 3 different props on the Franklin 90 that would all overspeed in level flight even up at 9500'.  I am not sure there is any (fixed pitch) prop that would not do so.  I do know that years ago 1 (or more) Cadet, probably with 75hp, flew off the end of the runway in ground effect.  I expect it had a high pitch prop and may not have made the minimum static RPM on the ground run.

Brett Lovett:
I don't believe that Culver equipped any LFA models with the 90 Franklin, so I doubt there's any documentation for a recommended prop for that model.  However the Model L-AR-90 (Army PQ-8) was equipped with the Franklin 4AC-199-E-4 (Army YO-200-1).  The library at University of Texas at Dallas has a copy of the Culver Aircraft Corporation Specification No. 13 for the L-AR-90 in it's Al Mooney collection.  It specifies a Sensenich 70AB56 propeller.

Paul Rule:
The 90hp 4AC-199E3 is listed in the Culver TC and requires a static RPM range of 2200 to 2300rpm and a diameter of 68" to 70".  Under propeller (for both Franklins) it says "wood-fixed or adjustable pitch".  To find if a prop is elegable to install you must look at the propeller TC sheet. 

Looking at the Sensenich TC sheet P-170 ... the W70AB (and the W72DF if it has been cut down to at least 70") are the only ones that fits a Franklin and are rated for 90HP.  So if you want Sensenich you are stuck with those props.  If you are still running the 80hp then (due to higher RPM) you have the choice of only the W70AF model.

In looking at the prop TC I see that my memory is failing... the elegable pitch range for the W70AB is 46" to 56".

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