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In lugnet.technic, Thomas Avery writes:
Thanks for the update!
> The axles hold up during gear failure. I've never noticed any permanent
> warping either. At least there's no noticeable warping.
Long long ago, when I first got into the hobby, I was corresponding with
John Gerlach about lift bridges and he reported axle failures, but it was
due to shear rather than torque.
He had a (lift) bridge so heavy that a single axle at the axis of rotation
could not take the weight, it kept shearing. He used a technique involving a
gear! Rather than the bridge having an axle pivot, the truss was pinned to a
gear and that gear rolled in a number of 8t gears on the abutment that
together, kept it confined around an axis of rotation as it moved.
I copied .trains so he can correct me if I misremembered.
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Message has 1 Reply:
Message is in Reply To:
 | | Re: Power Pullin' With My Tractor
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| (...) Thanks! Okay, try it again: (URL) added some pictures to the "breakage" section that show the broken gears. I'm pretty sure that they break from the axle hole outwards. There's a high stress concentration at the point of axle connection. I've (...) (22 years ago, 25-Jan-02, to lugnet.technic)
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