No plans, i just made it up as i went along. scratch built mostly from stuff i already had in my garage. so-far it doesn’t leak! next is to find a motor for it. 4-wheel pedal car plans. build your own pedal car out of bicycle parts! save gas and the planet by driving this "green" self-propelled vehicle wherever you need to go.. Don’t forget to add the ooogah horn when you build this homemade electric car for the kids next birthday. these are free plans for a antique auto half-scale replica.