The Q like most early KC-135 used used Turbojets(J57) later upgraded to Turbofans (CFM56) as the T J57: https://en.wikipedia.org/wiki/Pratt_%26_Whitney_J57 htt

The Q like most early KC-135 used used Turbojets(J57) later upgraded to Turbofans (CFM56) as the T J57: https://en.wikipedia.org/wiki/Pratt_%26_Whitney_J57 https://en.wikipedia.org/wiki/Pratt_%26_Whitney_J57 CFM56: https://en.wikipedia.org/wiki/CFM_International_CFM56 https://en.wikipedia.org/wiki/CFM_International_CFM56 As far as I know only the A-12 family and the X-51 used JP-7 given it needed Triethylborane (TEB) to ignite. https://en.wikipedia.org/wiki/JP-7 https://en.wikipedia.org/wiki/JP-7 https://en.wikipedia.org/wiki/Triethylborane https://en.wikipedia.org/wiki/Triethylborane More on the KC-135Q/T https://www.blackbirds.net/tankers/kc135q.html https://www.blackbirds.net/tankers/kc135q.html http://www.habu.org/kc-135q/kc135q.html http://www.habu.org/kc-135q/kc135q.html