The "Tentacled Engine" is an engine created by putting two steering hinges on oppisite sides of the starting block. There is no need to change controls either.
Controlling
When the the player presses left or right, the steering hinges collide with each other causing the machine to spin around violently. The more time the player pushes left or right, the faster the engine goes, also causing it to throw off arms quicker than if it was at a slower pace.