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Old December 1 2012, 10:39 AM   #6
MacLeod
Admiral
 
Location: Great Britain
Re: Skylon: ESA clears the SABRE rocket-jet engine hybrid

Mach 5.5 is what London to New York in 90 minutes.

(Curiously this announcement comes shortly after the UK announced it was going to increase it's contribution to ESA)
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