Vehicle to carry bottle. Our first one was built from mechano. A roller skate will do. Tape, electrical works good. In order to complete the construction, you might want to view this gif image of the dragster.
Construction Remove the cap liner Drill a hole in the cap.
Tape the bottle to the vehicle, 4-6 turns will do. If it is loose it can fly off and hit you or your pit crew. Remove burner assembly from propane torch, including metering orifice. We only need the valve to turn the gas on and off. A piece of rubber tubing helps make a good seal between the syringe and the gas pipe.