[EricH]

Originally Posted by martin417

One of my co-workers pointed out that stored energy in a Li-Io battery can often be released in an extremely rapid manner by shorting the leads...

So how about this: put the battery at the bottom of a rocket shaped device, as soon as the device is attached to the rail, short the leads. When the battery explodes, the minibot/rocket will be propelled to the top....

It would take a lot of batteries....

And probably violate safety rules.....

But, it would meet the new clarification of <G19>....

Actually, the blue box specifies the FTC motors. So much for creativity...