Thread: Aviation Question
View Single Post
  #3  
Old September 15th 08, 03:53 PM posted to rec.aviation.piloting
Bob F.[_2_]
external usenet poster
  
Posts: 84
Default Aviation Question
"PapaFoxTrot" wrote in message
...
At what speed defines Hypersonic?

What materials do you use on the outside
of a hypersonic aircraft??


check Wikipedia

--
Regards, Bob F.