Ultralight Aircraft National Air and Space Museum

The concept of gliders propelled by small engines emerged in the 1920s, but didn't rise in popularity until the 1970s. 

The Mitchell U-2 Superwing Showed How Versatile an Ultralight Can

USA 2019 – 34 Planes and Shuttles at Steven F. Udvar-Hazy Center

Steven F. Udvar-Hazy Center National Air and Space Museum

Steven F. Udvar-Hazy Center - Wikipedia

Journey North Crane

Ikarus C42 - my first time in an ultralight! : r/aviation, ikarus

2009アメリカ滞在記

Steven F. Udvar-Hazy Center National Air and Space Museum

Aircraft National Air and Space Museum

Air Space Museum Dulles – NeverStopTraveling