McCulloch AircraftHUM-1 (MC-4A) – Yanks Air Museum
McCulloch HUM-1 - Pima Air & Space
McCulloch J-2 - Pima Air & Space
McCulloch 2-Cylinder Opposed Drone Engine - The Miniature Engineering Craftsmanship Museum
McCulloch HUM-1 | After World War II, a number of small star… | Flickr
New Helicopter Demonstrated -- A new tandem-rotor, two-place helicopter designed for such jobs as crop dusting, pipe line patrol and forest fire spotting is demonstrated for the first time here today. The
Whirlygig: the troubled life of the J-2 autogyro : Air Facts Journal
McCulloch MC-4 helicopter - development history, photos, technical data