John Szalay added these comments in the current discussion du
jour ...


Back when white walls were still cool! ;-)

Aluminum actually,

"The SR-71 has 6 main BF Goodrich 32-ply tires, each filled
with 415 PSI of nitrogen. Impregnated with aluminum powder to
reduce heat"

Them's one helluva lot of psi's! Never thought of using a metallic
powder as a heat sink for the "rubber" tires.

--
HP, aka Jerry

"The enemy of my enemy is my friend, the enemy of my friend is my
enemy, but the friend of my enemy is also my enemy" - variant of
Middle East Maxim