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Avions expérimentaux américains

XP-54 (1943) XP-55 (1943) XP-56 (1943)
X-1 (1946) X-2 (1955) X-3 Stiletto (1952) X-4 Bantam (1948) X-5 (1951) X-7 (1951) X-10 (1953) X-15 (1959)	D-558-1 Skystreak (1947) D-558-2 Skyrocket (1948) X-21A (1963) X-31 (1990)	XF5U (1943) XF-85 Goblin (1948) XF-88 (1948) XF-88B (1953) F-107A (1956)	Bombardiers-transport : XA-38 Grizzly (1944) XB-36 (1946) XB-42 (XB-43) Mixmaster (1944) XB-46 (1947) XB-48 (1947) XB-51 (1949) XB-70 Valkyrie (1964) XC-120 Pack-Plane (1950)
Avions de type lifting body (sans ailes) : M2-F2 (1966) HL-10 (1966) X-24A (1970) X-24B (1973)	Ailes volantes - Flying wings : XP-79B (1945 ) B-35/YB-49 (1947)	Hydravions : XF2Y SeaDart (1953)
Avions d'étude sur le vol vertical - V/STOL research aircrafts : X-13 Vertijet (1955) X-14 (1957) X-18 (1959) X-22A (1966)	XFV-1 Salmon (1954) XFY-1 Pogo (1954)	XV-3 (1955) XV-5 (1964)	VZ-2A (1957) VZ-3RY Vertiplane (1958) VZ-4DA (1958) VZ-8P Airgeep II (1962)