Hi RL If you ever make the mistake here in Florida of ever taking the
water out of a gunite concrete swimming pool it will come up out of the
ground and float. Here in Florida asphalt,and cement is every where. I
think that is even truer for NY city. If I knew how long the very high
heat lasted I might come up with better ideas? I did figure out how to
cool a roof with the heat of the Sun,and it has no moving parts. I can
see its physics helping keeping the underbelly of the shuttle cool
Bert