Subject:
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Re: building a bicycle -- can it be done?
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Newsgroups:
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lugnet.technic
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Date:
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Sat, 2 Sep 2000 01:07:36 GMT
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Viewed:
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586 times
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I have a solution for the coasting problem. This method allows the wheel to
move without the pedals moving and even allows the wheels to move forward if
the pedals are moving backwards.
The pedals drive one axle of a differential. The other axle of the
differential equiped with a ratchet so that it can only rotate in the
forward direction (the same direction as the axle coming in on the other
side). The body of the differential drives the wheel.
The result of all this is that when the pedals move forward, the wheel must
turn. When the pedals move backward, the alternative axle (the one with the
ratchet) will move leaving the wheel free to do as it pleases (the excess
speed will also be transfered to the alternative axle). The same thing
happens if the pedals do not move.
That probably sounds confusing. Trust me. Build it. You'd be surprised
what you can come up with using those differentials....
Enjoy.
Grant Elliott
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Message has 1 Reply:
 | | Re: building a bicycle -- can it be done?
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| Very nice solution. But we're building a bicycle, not a car!! Differentials are ungodly bulky things, but for technical accuracy, they might do the trick!! Have to upgrade the elephant cyclist to a hippo or whale now! ;-) Cheers ... Geoffrey Hyde (...) (24 years ago, 2-Sep-00, to lugnet.technic)
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Message is in Reply To:
| | Re: building a bicycle -- can it be done?
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| David Eaton <deaton@intdata.com> wrote in message news:G07p2s.MF8@lugnet.com... (...) brick (...) thin (...) No, I said smallest. Bevel gears aren't the smallest. :) (...) Possibly. but it would be fun trying methinks. (...) weren't (...) small (...) (24 years ago, 1-Sep-00, to lugnet.loc.au, lugnet.technic)
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