The inventor of the PICA heatshield does not think it was a very possible technology [1]. As evidence, nobody since has tried to revive it. 1 - https://youtu.

The inventor of the PICA heatshield does not think it was a very possible technology [1]. As evidence, nobody since has tried to revive it. 1 - https://youtu.be/g3gzwMJWa5w?t=460 https://youtu.be/g3gzwMJWa5w?t=460