Pulse jet
https://youtu.be/bKHz7wOjb9ww
Build a man a fire, he's warm for a day. Light a man on fire and he's warm for the rest of his life!
https://youtu.be/bKHz7wOjb9ww
Build a man a fire, he's warm for a day. Light a man on fire and he's warm for the rest of his life!