[quote][b][url=/v3/forum/%C3%A9tats-unis-31/topic/douglas-d558-skystreak-et-skyrocket-1870/?post=72317#post-72317]jericho[/url] a dit le 25/01/2012 à 11:57 :[/b]

Je sais que la source n'est pas forcément toujours très fiable, mais d'après [url=http://en.wikipedia.org/wiki/List_of_X-planes]Wikipedia[/url], ton hypothèse serait juste Clan's:  :oui: 

[i]"Most of the X-planes have been operated by the National Advisory Committee for Aeronautics (NACA) or, later, the National Aeronautics and Space Agency (NASA), often in conjunction with the United States Air Force. However, not all US experimental aircraft have been designated in the X-plane series; [b]some received U.S. Navy designations prior to 1962[/b],[5] while others have been known only by manufacturers' designations,[N 1] non-'X'-series designations,[N 2] or classified codenames.[N 3]"[/i]

Et parmis la liste des appareils expérimentaux de la Navy:
"Research Aircraft, 1910-1962Douglas D-558-1 Skystreak - Douglas
Douglas D-558-2 Skyrocket - Douglas
Gallaudet D-1
Gallaudet D-4"[/quote]