The X-24C proposed to incorporate lessons learned during the X-15 and X-24B trials. The expectation was that the X-24C would reach top speeds exceeding Mach 8 while performing hypersonic skip-glide maneuvers for long-range missions.
The X-24C was to take the lessons learned during the X-15 and X-24B projects, with the expectation that the X-24C would be able to reach Mach 8 speeds and perform hypersonic skip-glide maneuvers for long-range missions.
By the end of 1977, the L-301 program and its proposed X-24C were canceled, likely due to the expense and long-lead time for producing the aircraft. It’s too bad.