Fuel Tank
This is a picture of the gas tank for the Demoiselle. It didn't hold
very much fuel, but you weren't planning on flying very far. They were very
small tanks. The copper line that's coming down from the front of the tank is
the fuel line. That curled look to it is not just for Jules Verne style or
anything. That is actually very practical and very useful. And that was used to
dissipate the vibration from the engine so that the fuel line wouldn't crack.
And by curling it like that, you added a lot more life to the fuel line.