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HomeRC & Power✈️Aircraft🚁HelicopterEngines Plugs Mufflers Fuel › OS 37 crankshaft design
06-06-2011 01:08 AM  8 years ago
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ki4bbl

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Virginia Beach, VA. USA

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OS 37 crankshaft design
I had an interesting occurrence this evening. After installing a throttle jockey on my motor, I wanted to take it for a test spin. It started then shut down. I found out that the clutch was crooked, but while doing that, I also noticed the crankshaft just barely on the cam. There is no screw holding that tight? I guess the only thing that keeps that shaft on is the backplate? Wow

Greg
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06-06-2011 01:21 AM  8 years ago
MartyH

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USA

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I for one don't understand what you are trying to say.

Marty
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06-06-2011 02:51 AM  8 years ago
jsenicka

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Eagle River, WI

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No. The nut on the fan assembly pulls the crankshaft hard to the front. The crank only touches the back plate if the fan is not bolted on tight.Jim Senicka
Team Manager, GrandRC Flight Team
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06-06-2011 02:52 AM  8 years ago
jsenicka

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Eagle River, WI

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If you mean the connecting rod on the crank pin, then that just centers naturally. No boltJim Senicka
Team Manager, GrandRC Flight Team
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06-07-2011 04:02 PM  8 years ago
ki4bbl

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thanks Jim...That helps.
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06-07-2011 04:37 PM  8 years ago
jgunpilot

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Pollock, LA

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If you have a cam there are some extra pieces in there!
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06-07-2011 06:34 PM  8 years ago
MartyH

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USA

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OoooH!, I can translate now. The fan came loose from the engine which jambed the clutch and stopped the engine. The OP then was asking about holding the connecting rod (which he called the crankshaft) on the crankpin which he calls the cam. He noticed the rod was not all the way on the crankpin which of course was allowed to happen because the crank is floating until the fan is tightened properly.

Marty
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06-08-2011 11:33 PM  8 years ago
ki4bbl

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Virginia Beach, VA. USA

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Thank you all for clarifying Marty, I can now articulate the parts of the motor quite succinctly

Till next time

Greg
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