X-15A #2 with full-scale ablative and external tanks installed parked in front of hangar.
EC67-1794
X-15A #2 with full-scale ablative and external tanks installed parked in front of hangar.
In June 1967, the X-15A #2 rocket-powered research aircraft received a full-scale ablative coating to protect the craft from the high temperatures associated with hypersonic flight (above Mach 5). This pink eraser-like substance, applied to the X-15A #2 aircraft (56-6671), was then covered with a white sealant coat before flight. This coating would help the #2 aircraft reach the record speed of 4,520 mph (Mach 6.7).August 4, 1967NASA Photo / NASA› X-15 Project Description