[KwartzLab] Making a spoked, wooden wheel
punkin at mag3.14159.ca
Tue Nov 15 17:31:04 EST 2011
Although you can't tell from this picture, the frame unscrews from the block (in the back; you can just barely make out the knob), and then folds down on top of that block. It makes for a very compact profile for storage, and hauling about.
If I raise the block and affix the arm directly to it, that would shift the collapse point to above that arm, rather than below it. So I'll need to increase the space there a bit, to accommodate the fold.
I'm having trouble visualizing how it would work, with the connecting arm under the pedals, though intrigued by that idea.
On 2011-11-15, at 4:45 PM, Kevin Martin wrote:
> Oh! That way of doing double treadles did not occur to me! This avoids needing the double crank.
> This looks more durable than the other one, actually, since the wheel appears to have proper bearings and the frame gives more direct connection between all the components.
> I would make one change though... I would make the block joining the main upright to the base taller, so the pivot for the treadle connecting arm would attach to it; the long pivot pin in the picture looks like a source of flex (and thus wasted effort). Or maybe I would move the connecting arm down so it is below the pedals; the pedals would just rest on it so two connecting links would be eliminated.
> -----Original Message-----
> From: discuss-bounces at kwartzlab.ca [mailto:discuss-bounces at kwartzlab.ca] On Behalf Of Punkin3.14
> The actual spinning wheel I'm trying to make will probably look more like this:
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