The CO wrote:I've come to love the method of putting a bungee on the back tire connected to the frame. As effective as a lock, and the comedy of watching someone try to ride it is priceless. A decent bungee will let the wheel rotate about 3 times before it stops, and will pull the bike backwards as soon as they stop pedaling.
Canoe wrote:(looks 1:1. Optical? as 15 degrees left gives a wheel 15 degrees right, for 30 degrees between them?)
Thorormr wrote:And I just had a moment of inspiration, what about a bike with spring brakes? IE, pulling the lever actually releases the brake, and letting it go allows the spring to engage the shoes. Looking at the rear brake on my bike it would be totally possible with the side pull cantilevers it has. Just take the cable off, add a drum brake spring in its place, and cut four small sections of 1/8"x1/2" bar, rob the adjuster and nut off an old side pull brake and make sort of a center pull scissor jack to stretch the spring. Make me wish I had facility and spare parts to toy with the idea.
Elliot wrote:Thor, that's a fabulous idea. And the "scissor" mechanism to release it. You have it all designed!
I can add only one suggestion: The brake lever can perhaps be modified so it has a "catch" to keep it pulled in, so the hand muscles do not cramp up while riding.
So who's building it?
Incidentally, big trucks and buses with pneumatic brake systems have such spring-loaded parking brakes to keep the vehicle secure even if all the compressed air leaks out while the vehicle is parked. Likewise, if a major leak occurs while driving, the spring brakes come on by themselves.
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