16 ms·So how fast & high would the carrier aircraft have to go for it to make sense?by sidewndr46 4y agoSo how fast & high would the carrier aircraft have to go for it to make sense?IshKebab 4y agoVery. Orbital velocity is like Mach 23 or something. The X-15 could apparently go to Mach 6, but probably not if it was carrying a rocket!aidenn0 4y agoThe x-15 was a rocket