A picture of how the engines in the Carmania power the propellers.

Ship Engine

A picture of how the engines in the Carmania power the propellers.

"The New Jersey troops crossing the Chesapeake Bay, in sixteen propellers, on their way to Washington, May 4th, 1861." — Frank Leslie, 1896

New Jersey troops

"The New Jersey troops crossing the Chesapeake Bay, in sixteen propellers, on their way to Washington,…

"The chamber (curvature) of the blades should be (1) equal, (2) decrease evenly towards the tips of the blades, (3) the greatest depth of the curve should, at any point of the blade, be approximately at the same percentage of the chord from the leading edge as at other points." —Barber, 1917

Aeroplane Propeller Balance Chamber

"The chamber (curvature) of the blades should be (1) equal, (2) decrease evenly towards the tips of…

The illustration of an aeroplane, or airplane, propeller being balanced by using surface area testing. The length of the blade on opposite sides must be equal.

Aeroplane Propeller Balance Blade Surface Area

The illustration of an aeroplane, or airplane, propeller being balanced by using surface area testing.…

An illustration of weighing the propeller of the aeroplane to ensure it is balanced with the opposite side.

Aeroplane Propeller String Balance

An illustration of weighing the propeller of the aeroplane to ensure it is balanced with the opposite…

A propeller is a type of fan which transmits power by converting rotational motion into thrust. A pressure difference is produced between the forward and rear surfaces of the airfoil-shaped blade, and air or water is accelerated behind the blade.

Screw Propeller

A propeller is a type of fan which transmits power by converting rotational motion into thrust. A pressure…

An apparatus which, being fitted to ships and driven by steam, propels them through the water.

Screw-propeller

An apparatus which, being fitted to ships and driven by steam, propels them through the water.