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Description
This aircraft is the second of the three X-15s. North American modified it for even greater speed, adding the large orange and white propellant tanks and lengthening the fuselage about 18 inches. This was the fastest X-15, reaching Mach 6.7 in October 1967. It was delivered to the museum in 1969.

Description
This aircraft is the second of the three X-15s. North American modified it for even greater speed, adding the large orange and white propellant tanks and lengthening the fuselage about 18 inches. This was the fastest X-15, reaching Mach 6.7 in October 1967. It was delivered to the museum in 1969.