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Visit us in Washington, DC and Chantilly, VA to explore hundreds of the world’s most significant objects in aviation and space history.
Learn how aviation and spaceflight transformed the world.
The lunar module represents one of humanity’s greatest achievements: landing people on another heavenly body.
Don’t miss our fast-paced webcasts designed to engage students in Science, Technology, Engineering, and Math in 30 minutes.
Apollo 11 was a global event. What did that historic mission mean to you? Share your story and read what others have to say.
Our scientists are involved in current research focused on the Martian climate and geology. Find out what we’re discovering.
Recognize your favorite air or space enthusiast. Add his or her name to the Museum’s Wall of Honor.
Hamilton Standard Controllable Pitch Propeller
This propeller, one of the first produced by Hamilton Standard, represented a major advance in aircraft technology. It allowed a pilot to adjust the blade’s pitch to provide the best performance at different air speeds—similar to changing gears in a car or on a bicycle. On takeoff the pilot chose a lower pitch to make the blade spin faster and provide maximum power. In flight the pilot switched to a higher pitch to make the blade spin slower and conserve fuel.The propeller is preserved in “used” condition.