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pjeffers(at)talktalk.net
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 Posted: Tue Oct 13, 2009 5:15 am Post subject: Rotax 912 ULS kicking back! Newbie needs a hand .. |
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Bob,
IMHO The sprag clutch is that which engages drive from starter to crankshaft.
This sprag clutch does wear during use and frequent kick backs accelerate this wear.
The overload clutch, which may or may not be fitted on a particular engine, is there to protect the crankshaft in the case of prop strike.
Loss of the correct torque setting for this clutch will also accelerate wear the wear on the sprag clutch. In the longer term sprag clutch wear is one cause of bad starting and kick backs.
Pete
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ptag.dev(at)tiscali.co.uk
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| Posted: Tue Oct 13, 2009 7:05 am Post subject: Rotax 912 ULS kicking back! Newbie needs a hand .. |
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Pete
I hear what you say. However I’ve always called starter clutches ….Bendix. I’ve only ever heard of the gearbox end of operations called a sprag clutch It is almost identical to the primary drive device on my 1936 Velocette which eliminates the firing shock to the primary drive chain from the piston.
However and which ever I think we have now some common understanding >
Regards
Bob Harrison.
From: owner-rotaxengines-list-server(at)matronics.com [mailto:owner-rotaxengines-list-server(at)matronics.com] On Behalf Of pjeffers(at)talktalk.net
Sent: 13 October 2009 14:05
To: rotaxengines-list(at)matronics.com
Subject: Re: RotaxEngines-List: Re: Rotax 912 ULS kicking back! Newbie needs a hand .
Bob,
IMHO The [i]sprag clutch[/i] is that which engages drive from starter to crankshaft.
This [i]sprag clutch[/i] does wear during use and frequent kick backs accelerate this wear.
The [i]overload clutch[/i], which may or may not be fitted on a particular engine, is there to protect the crankshaft in the case of prop strike.
Loss of the correct torque setting for this clutch will also accelerate wear the wear on the [i]sprag clutch[/i]. In the longer term sprag clutch wear is one cause of bad starting and kick backs.
Pete
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