It is processed by brass and stainless steel. It uses a water cooling heat structure. Double flywheel design reduces the low speed response of ancient engine. It installs a tape oil for adjustable speed.
It sets a throttle switch that can link to control the speed of the engine. The igniter is powered 4.5V. It uses gasoline as a fuel, when you launch it. It will become a violent small machine!
Starting method: external force (high speed drill).