Richard,

Do you happen to know what the thermal conductivity of BX-250/265 spray
on foam is? This is the foam that NASA uses on the ET. I'm just
curious about how it stacks up against bulk aerogel or the Pyrogel
product.

By the way, you made some really good points regarding the drawbacks of
using aerogel as an insulator on the ET. Thanks for the thoughtful
response...it's something that's often lacking around s.s.s.

Craig