Hartzell F 7666-A Two-Blade Propeller, c. 1975

German Gardura Airship Propeller, c. 1920

3-Blade Ultra-Light Aircraft Propeller, c. 1990

20 Original Photographs of the America Airship LZ 126, 1925

Soviet Liquid-Propellant Rocket Engine Lavochkin V-751, 1957 onw

American AIM-9 Sidewinder Missile Model