Blueprints Wooden Swing Sets My Friend Says There Is Only One Gasoline Engine In The World With MOVING, INTERNAL, Wooden Parts. What Is It?

My friend says there is only one gasoline engine in the world with MOVING, INTERNAL, wooden parts. What is it? - blueprints wooden swing sets

1 / What is the vehicle with gasoline engine made of wood, mechanical moving parts?
2 / What is the name of the engineer on the plans for the car and the engine that has the wooden interior, moving parts?
Anyone who loves cars there, which has developed a history of this car / engine, and why they use for the wood pieces in an engine in the first place?
Thank you for your help on this!