Beautiful ca. 1963/64 color artist’s concept depicting the release of X-15A2 from its B-52 mothership. Note the scramjet & one of the two external fuel tanks.
Per Google’s AI Overview:
“While there were plans to incorporate a scramjet, it was never actually used in flight. The fuselage was extended to accommodate liquid hydrogen for a planned scramjet, but the scramjet itself was only flown in mockup form and never tested during X-15 flights. Wikipedia states that the dummy scramjet was mounted on the ventral fin of the X-15A-2 and was damaged during landing due to heat, breaking off and falling away.”
I assume, maybe, that this work is also by D. E. Wilson, as was the original (without scramjet & external tank(s)), which I’ve linked to below.
I downloaded the image from the following website. In doing so, I cropped out their bullshit copyright claim, as I don’t recognize it. They should be thankful I’ve provided some free, albeit minimal & inconsequential, publicity:
www.airteamimages.com/north-american-x-15_56-6671_usa-us-...
Credit: “AirTeamImages” website