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C201 pitch stops
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Mog
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Joined: 26 Nov 2010
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Location: Dallas, TX

PostPosted: Tue Mar 12, 2019 11:02 am    Post subject: C201 pitch stops Reply with quote

Ok, so I have a C201 being rebuilt as we speak. However I need to give the shop the pitch stops. Does anyone have accurate information on this so I can try to get this right the first go around.
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vaughans



Joined: 23 Sep 2006
Posts: 85
Location: OLALLA, WA

PostPosted: Tue Mar 12, 2019 12:26 pm    Post subject: Franklin with 82" Mac 201 Reply with quote

Had an 82" Mac 201 done by Northwest Propeller Service to go on my M4220C Maule. Set low pitch to 9.5 degrees from 13, .310 spacer was changed out to .175 to acheive the change. They have done quite a few these for installation on the 220 Franklin. Hope this helps as this question seems to come up from time to time.

vaughans
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Mog
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PostPosted: Thu Mar 14, 2019 2:02 pm    Post subject: Reply with quote

What about high stop? Or maybe your saying 9.5 low and 13 high?
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vaughans



Joined: 23 Sep 2006
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Location: OLALLA, WA

PostPosted: Fri Mar 15, 2019 8:43 am    Post subject: Reply with quote

Mog,
As stated prior what they did to acheive proper setup for the Franklin, log book entry reads, Removed, cleaned and installed propellor cylinder, set low pitch to 9.5 degrees, per McCauley manual MPC200. Your prop shop should be able to fix you up with info provided.

vaughans
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Mog
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Location: Dallas, TX

PostPosted: Fri Mar 15, 2019 7:23 pm    Post subject: Reply with quote

I appreciate the info without question, but the shop is asking me for the pitches both high and low. I will see if MPC200 means anything to them, but my search shows that’s just a generic manual for the 200 series prop.

I have found other pitch info from the Stinson crowd.

Low 11.5 High 22
And
Low 13 High 24.5
Then of course your recommendation of
Low 9.5 High unknown?

The prop shop is in Cali and I’m here in Texas. Testing and changing is not overly viable. If I get it wrong the first time then I will have to pay another shop here to change the stop shims.
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MauleWacko
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PostPosted: Sat Mar 16, 2019 6:16 am    Post subject: Reply with quote

. Shocked

Last edited by MauleWacko on Mon Apr 01, 2019 4:27 pm; edited 1 time in total
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vaughans



Joined: 23 Sep 2006
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Location: OLALLA, WA

PostPosted: Sat Mar 16, 2019 11:34 am    Post subject: Reply with quote

Mog,
Not my recommendation, Was what the prop shop that knew what they were doing stated & supplied on the FAA 8130 form. If your shop doesn't know what to do I think I would be leary of using them & find a shop that knows what to do, customer should not have to tell them how to do their work. I watched the work when they did it, took it home & installed with my mechanic & everything works great as it should. Don't know how else I can help.

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Mog
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Location: Dallas, TX

PostPosted: Thu Mar 21, 2019 11:10 am    Post subject: Reply with quote

I know this has been asked before, but the actual info appears to be transferred through email or PM. I’m looking for 2 or more 337’s that I can use along with mine for the C201 field approval. Any help is appreciated.
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Mog
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PostPosted: Thu Mar 28, 2019 12:32 pm    Post subject: Reply with quote

My prop ships in a few days, I have a bunch of 337 info on Stinsons, but it would be nice to have a couple M4 337’s. Can anyone please help so I can make this a painless approval.
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Andy Young
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PostPosted: Thu Mar 28, 2019 2:30 pm    Post subject: Reply with quote

Please help to understand: What is this thing you call “painless approval”?
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Mog
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PostPosted: Thu Mar 28, 2019 2:53 pm    Post subject: Reply with quote

Yeah yeah, just less painless. Wink
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MauleWacko
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PostPosted: Fri Mar 29, 2019 5:15 am    Post subject: Reply with quote

Shocked

Last edited by MauleWacko on Mon Apr 01, 2019 4:26 pm; edited 1 time in total
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Andy Young
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Location: Alaska, Antarctica, Colorado, and Others

PostPosted: Fri Mar 29, 2019 5:27 am    Post subject: Reply with quote

MauleWacko wrote:
.
Now with the extended gear out I would run a 86 inch C201 if it were me.
Now ask me how you do a flat tire load test with the gear spread to max limit? Shocked


Hmmm...grease plates under the flat tires, and ratcheting cargo straps between the bottom of the gear leg and the strut attach point at the wing? That might cause me to worry about collapsing the strut. How about straps to the wing attach fitting at the root? Funky geometry for the pull though...
Porta-power between the bottoms of the gear legs??
One could remove the springs and install shims that simulate the spring compressed length, but that’s a lot of work.

Do tell; how did you do it?
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MauleWacko
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PostPosted: Fri Mar 29, 2019 6:53 am    Post subject: Reply with quote

Shocked
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Mog
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Location: Dallas, TX

PostPosted: Thu Apr 04, 2019 10:05 am    Post subject: Reply with quote

Prop came in today. Its beautiful. You can clearly see the extra surface area of the blades.

Now if I can just get it approved. Still striking out on 337 examples for the M4. The DFW FISDO is notoriously harder than many others and every little bit helps. I have all the docs from Mccauley showing the different variants STC’d for the Franklin, but nothing that nails down the M4.
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