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Wanted: McCauley 1B90 or A90

Renkou1

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Will be needing a prop for the C 90 that I'm building up for my J3C-65. Will be traveling in the Western US in April / May.
Might be able to pick up propeller and save packaging and shipping problems. Pay per propeller condition.
Might sign off your cub annual while I'm there if ac is READY AND AIRWORTHY.
 

tophand

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I have one but it would have to be cut down. I'm running it right now. I'd me willing to send it to the prop shop I use to make sure of it.

........Mike
 

tophand

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It's a 74/44 that was repaired in '75 or so to 73 inches. I looked at the TCDS and just guessed what you wanted.

........Mike
 

Renkou1

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So right now its a 73/44?
Is it elliptical or square tip?
What area of the world are you?
Thanks
R
 

tophand

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It's elliptical. I'll see if I have a picture with the whole prop in it.

Faith, SD.......D07
 

Renkou1

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According to my data a 7444 can only be cut / repaired to 72.5.
I like a long prop. Forgot...is it CM 7444.
I will need to check prop tcds....might just work.
 

tophand

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If that's the case it probably won't work.
(10) C-90-8F (landplane, skiplane and seaplane) Use actual weight change
Engine Limits: Takeoff, 2475 r.p.m. (90 hp)
All other operations, 2375 r.p.m. (80 hp)
Fuel: 80 minimum octane aviation gasoline
Oil Capacity 5 qts.
Propeller Limits:
Static r.p.m. (with Item 101, 5 or 6 propellers) at maximum permissible throttle setting:
Not over 2300; not under 1950 for land and skiplane, and and not under 2100 for seaplane.
No additional tolerance permitted.
Diameter:
(a) With Item 5 or 6 propellers:
Not over 71 inches, not under 69.5 inches.
(b) With Item 101 propeller:
Not over 76 inches, not under 70 inches.
Carburetor heat system must be modified to provide required heat rise.
Approved modification made by M. Mullis, York, South Carolina.
........Mike

AC_005.jpg


AC_005.jpg
 

Renkou1

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I will make some calls. I want to find out if the 74 prop is a heaveir blank out further or is the same thickness at common stations.
That is to say the same blank to start with and thus can be cut down from 7444 to 71xx. I suspect...but do not know...that the 71s are thinner earlier in their diameters.
Will know more after a few calls.
R
 

tophand

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That makes sense

....Mike
 
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