Looks like the bike cam off pretty well!
I wonder if maybe it would work better without an escapement and instead using a nuvinchi hub or a scooter derived CVT. You would put it in e very high gear before releasing the spring, so the launch would not be TO hard, and then reduce the gear as the spring wound down. Obvious drawback is - no ticking.
I'd be sorely tempted to weld a bolt head to the end of those spring axles and wind them up with an impact wrench or other mechanical power source...
I have to ask, how the HELL did NG end up picking you? Kinda sounded like it was "out of the blue", but I'm guessing there is a back story...
Wonderfull machine. I can imagine the enviroment would be cleaner when all vehicles are clockwork powered.
The winding power still has to come from somewhere, so unless that somewhere is a clean source, no. And for a given amount of stored energy, a spring weighs more that pretty much any other method of storing energy, meaning your clockwork vehicles use more power to get anywhere, burn up more brake pads, kick up more dust, need more space on the road to transport the same number of people, etc.
Fun idea, but only useful on a toy scale. Some folks just build bigger toys than others.