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Q:

Why won't a propeller work in space?

A:

A propeller provides the airplane’s thrust by making a difference in air pressure between the front and the back of the blade. Space is a vacuum, which means that it has NO air. Without air, the propeller can’t provide thrust to move an airplane forward. Because of this, space crafts use rocket engines, powered by an oxidized fuel, to provide propulsion in space. 

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Categories: Forces of Flight