A propeller, of the Enola Gay (the plane that dropped the a-bomb on Hiroshima, Japan). ©2020 Henry S. Winokur
The Space Shuttle, Discovery at the Smithsonian's Udvar-Hazy Center in Chantilly. ©2020 Henry S. Winokur
Thruster ports on the starboard side of the Space Shuttle Discovery, at the Smithsonian's Udvar-Hazy Center in Chantilly. ©2020 Henry S. Winokur