43186865 8D6E5F1D6BShed Raider rolls this way “This is my newly designed patato cannon. It uses the ignition from a toyota corolla to generate the spark. However rather than a 12 volt supply it uses a 27 volt. I also added a ball valve to the back so that fuel can be inserted quickly(not in this pic)”… Link. Also see MAKE volume 3 for our HOW TO.