Giant Propeller
From Valkyrien Skies
Giant Propeller
pic of constructed one
The Giant Propeller is a Multi-Block structure. It is a, between 3x3 and 7x7, 1 thick square of Giant Propeller parts.
It takes in rotation from Rotation Axles and maybe Gearboxes too? and propels the ship forwards or backwards depending on the Axle's direction.