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Home✈️Aircraft🚁HelicopterBeginners Corner › Clutch on OS 61 SF
04-05-2018 05:50 PM  26 months ago
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Rockin Bird

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St Gabriel, La

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Clutch on OS 61 SF
What's the correct way to remove the clutch from an old OS 61 ?
That sweet smell of "Nitro"
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04-05-2018 05:57 PM  26 months ago
wjvail

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Meridian, Mississippi

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Rockin Bird ...remove the clutch from an old OS 61...
Hmm... Are you asking about removing the OS prop drive washer? Are you trying to remove the fan? Removing whatever clutch might be installed will depend on the brand of helicopter.

A picture would help.

Bill
"Well, nothing bad can happen now."
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04-05-2018 07:25 PM  26 months ago
Rockin Bird

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St Gabriel, La

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Clutch
It's off of a Concept 60 .
That sweet smell of "Nitro"
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04-05-2018 07:45 PM  26 months ago
KJH

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Interlochen, MI, U.S.A.

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Looking at pics on the interwebs, it's threaded on. You'll need some way to prevent the crankshaft from moving. Either the Delrin stop that goes around the connecting rod once you remove the backplate or a soft handle toothbrush in the crankshaft after removing the carb. Might need to heat the crankshaft a bit to loosen up the Loctite. Use a rag around the clutch. Lefty Loosey.-Kevin
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04-06-2018 02:49 AM  26 months ago
wjvail

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Meridian, Mississippi

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Does this help? My guess is you will need to make a tool that engages the holes in the clutch shoes. As KJH said, you will need a way to lock the crank.

https://www.manualslib.com/manual/9...l?page=7#manual

"Well, nothing bad can happen now."
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04-07-2018 09:58 PM  26 months ago
Rockin Bird

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St Gabriel, La

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Clutch
Yes , that's what I thought. Thanks again.
That sweet smell of "Nitro"
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05-23-2018 04:41 PM  24 months ago
ticedoff8

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Morgan Hill, CA. USA

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This should fit the OS 61 as a crankshaft lock.
It is used on the SAB Goblin Back Nitro (typically a .91 to 1.20 size), but the .61 is in the same league as the .91 (they are big block motors)

If not, at least it gives you an idea on how to make one for the .61 engine.
+ > ÷
Believe 1/2 of what you see and none of what you hear.
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05-24-2018 03:59 AM  24 months ago
balsabasher

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Central Ohio, USA

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They made a special tool to turn the clutch. Here's one for sale on Ebay.
https://www.ebay.com/itm/Heli-Max-C...0-/253488654543
Blades; what goes around, comes around!
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05-25-2018 08:57 PM  24 months ago
Rockin Bird

rrApprentice

St Gabriel, La

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Tool
Thanks again,RR members never give up,i love it.And big blocks sound really nice.
That sweet smell of "Nitro"
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