“Avions à décollage et atterrissage verticaux” (via balnibarbi, Mondorama 2000)
Those planes in full: the Hawker Siddeley HS.141, Canadair CL-84 “Dynavert”, Hawker Harrier, and de Havilland Canada DHC-7. Only the last two entered production, but the concept used by the CL-84 is similar to that of the Bell Boeing V-22 Osprey, now in use by US armed forces.
Paul Mison's random stuff that doesn't go elsewhere. Is it microblogging, or microactivity?
(Previously known as 'tumblr is my sock drawer', for reasons that are somewhat unclear.)