First made a push stick for in-line skating...

https://farm6.staticflickr.com/5270/...79e62d61_z.jpg

Got a little real-world use out of it. It was fun. Eventually the right
angle gear broke from normal wear and tear. Having no support on the other
side of the wheel, that was no surprise.

That did not take advantage of a clutch, mainly because there is no
clutch on DeWalt's right angle drill. Stopped skating. Started cycling.
Now I get to take advantage of all the cool stuff that a cordless drill
includes, including the clutch...

https://farm4.staticflickr.com/3681/...deaab67a_c.jpg

https://farm1.staticflickr.com/538/1...d07dec60_c.jpg

Apparently the drivetrain has loosened up a bit. Using the highest
clutch setting (before drilling) worked fine for going up slight hills
today. The clutch only slipped once, when I was at a stop and
accidentally slapped down on the throttle. Worked just like it's
supposed to.

Bought some aluminum and plastic suitable for rebuilding the sprockets
without wood. I might try to eliminate all the wood in the structure,
but wood is useful for making unplanned additions. Or maybe I will try
using thick PVC slabs. It's lighter than aluminum.

Also want to upgrade the drill to one that includes a soft start
feature. The soft start sounds cool for more smoothly powering a
bicycle. It might not be necessary, but I'm sure it's better.