Boeing B-52 Stratofortress (52-0003)

From Joe Baugher's aircraft list:

Boeing B-52A-1-BO Stratofortress, 52-003 converted to NB-52A X-15 launcher. Named "The High and Might[y] One". To MASDC Oct 15, 1969. Passed on to Pima Air and Space Museum, Tucson, Arizona.


More info from Wikipedia:

The last B-52A (serial 52-003) was modified and redesignated NB-52A in 1959 to carry the North American X-15. A pylon was fitted under the right wing between the fuselage and the inboard engines with a 6 by 8 feet (1.8 m × 2.4 m) section removed from the right wing flap to fit the X-15 tail. Liquid oxygen and hydrogen peroxide tanks were installed in the bomb bays to fuel the X-15 before launch. Its first flight with the X-15 was on 19 March 1959, with the first launch on 8 June 1959. The NB-52A, nicknamed "The High and Mighty One" carried the X-15 on 93 of the program's 199 flights.[249]

Click here for a photo:

https://en.wikipedia.org/wiki/Boeing_B-52_Stratofortress#/media/File:Boeing_NB-52A_carrying_X-15.jpg