Curved shaft - RCCanada - Canada Radio Controlled Hobby Forum
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Old 04-15-2007, 09:53 PM   #1
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Curved shaft

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Hi, I recently had a little crash with my Fugi 50 ei and my rigid plastic prop broke and my motor shaft(not the flange) is now a bit curved. 1-In the futur should I use wood prop who will minimise risk to curve the shaft in crash ? 2- Should I fly again with that motor? At low speed I see the spinner move but at high speed I don't detect anything. Thanks for information gentelmens ! Paul
So hard to make 3D but I love it !
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Old 04-16-2007, 10:56 AM   #2
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To start are you sure the shaft is bent? How is the vibration as that will create problems with the rest of the airframe. As you can see that the shaft is not running true you then have to identify or find where the bend is. If it was mine and I have straightened a few I would dismantle it and mount it on a lathe and check there. Sometimes you can see then where it is and and then fix the problem. Double check after on the lathe. Don't get carried away with the big hammer but do small changes and keep checking. Pain in the butt but it is better this way.
I don't like having any run out or bend in a high speed rotating shaft as it is just a matter when the shaft will fracture and it will sooner or later.
John Davidson
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Old 04-16-2007, 11:20 AM   #3
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Yes the shaft is a bit bent at the junction of the motor. I took off the flange and look at it and he's ok . And when I turn the shaft slowly I can see it's bent for maybe 1/16 on 1/2 turn. Looks like a big job to dismentle ! I don't know yet . And this ...shaft cost 159.00 us ! Thanks ! Paul
So hard to make 3D but I love it !
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Old 04-16-2007, 04:56 PM   #4
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I think Tower Hobbies sells a crank replacement for your engine,i think they are around 160us.
Send yours out first to a machine shop a see if they can true it.
Good luck.

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Old 04-16-2007, 05:10 PM   #5
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