"Bluuuue Rajah" Bluuuuue@Rajah. wrote in message
. 17.102...

http://spacefellowship.com/News/?p=8617

As Apollo did, Orion will use an Avcoat heat-shield, which is made of
"silica fibers with an epoxy-novalic resin filled in a fiberglass-phenolic
honeycomb." Damn fools, shuttle tile is the good stuff. It shouldn't
take
three years to learn that they did it right the last time. :P~

The velocity of a vehicle reentering coming from the moon is *a lot* higher
than the velocity of a vehicle reentering coming from low earth orbit.
Given the shape and density of the Orion (similar to Apollo CM), I've got to
believe that the shuttle TPS materials simply aren't good enough.

Jeff
--
"Many things that were acceptable in 1958 are no longer acceptable today.
My own standards have changed too." -- Freeman Dyson