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Broken Cox Babe Bee Crankshaft

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Broken Cox Babe Bee Crankshaft

Post  NEW222 on Sun May 24, 2015 5:21 pm

Ok. So went out and flew this weekend and had a ball doing so. I now remember how much fun this is. Anyways, I am now the proud owner of a Babe Bee engine that now sports a broken crankshaft. Sheared off the splines at the propeller end. Is there any way this thing can still fly, or do I need to look around for a used crankshaft? My Man-Win trainer was a hit, until.... Sorry that I do not have any pictures of it, as I forgot it at the cottage.
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Re: Broken Cox Babe Bee Crankshaft

Post  pkrankow on Sun May 24, 2015 5:48 pm

Get a replacement crank.
Coxengines.ca
exmodelengines.com
should have for the bees. You probably were using a screw that only held a few turns in. Switch to a stud that is seated all the way in with a cone of some type on it, or use a screw that is sized to go in nearly to the bottom. This will prevent breaking the shaft on the spline-shaft stress concentration.

Phil
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Re: Broken Cox Babe Bee Crankshaft

Post  TDbandit on Sun May 24, 2015 5:58 pm

If the splined portion is completely sheared off you've got to replace the crank, Bernie at Cox international has the cranks don't try and tighten the drive plate against the crank face in an attempt to run it, it will throw the prop in short order. (Bandit)

((Edit)) Phil kinda beat me to it but as he said make sure the screw is long enough, it will prevent that from happening again.
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Re: Broken Cox Babe Bee Crankshaft

Post  Admin on Sun May 24, 2015 7:28 pm

A few years ago I bought a box of engines and this was one of them included in the box. When I flipped the prop over, to my surprise the whole drive plate screwed off LOL!
















































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Re: Broken Cox Babe Bee Crankshaft

Post  GallopingGhostler on Mon May 25, 2015 7:33 am

TDbandit wrote:If the splined portion is completely sheared off you've got to replace the crank, Bernie at Cox international has the cranks
http://coxengines.ca/cox-.049-crank.html $5.95 US

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Re: Broken Cox Babe Bee Crankshaft

Post  TDbandit on Mon May 25, 2015 2:14 pm

GallopingGhostler wrote:
TDbandit wrote:If the splined portion is completely sheared off you've got to replace the crank, Bernie at Cox international has the cranks
http://coxengines.ca/cox-.049-crank.html $5.95 US
Thanks I meant to add a link and neglected to do so sorries (Bandit)
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