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A 'right-handed' propeller on a merchant vessel, which rotates clockwise to propel the ship forward
A 'right-handed' propeller on a merchant vessel, which rotates clockwise to propel the ship forward
Propeller of Pratt & Whitney Canada PW100 turboprop mounted on Bombardier Q400
Propeller of Pratt & Whitney Canada PW100 turboprop mounted on Bombardier Q400
Archimedes' screw
Archimedes' screw
Smith's original 1836 patent for a screw propeller of two full turns. He would later revise the patent, reducing the length to one turn.
Smith's original 1836 patent for a screw propeller of two full turns. He would later revise the patent, reducing the length to one turn.
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The Cessna 172 Skyhawk is the most produced aircraft in history.
The Cessna 172 Skyhawk is the most produced aircraft in history.
Hot air balloons
Hot air balloons
Airship USS Akron over Manhattan in the 1930s
Airship USS Akron over Manhattan in the 1930s
An Airbus A380, the world's largest passenger airliner
An Airbus A380, the world's largest passenger airliner