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Information Junky
Join Date: Mar 2001
Location: an island, upper left coast, USA
Posts: 73,167
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I don't know.
looking up...
Loaded weight: 7,920 lb (3,600 kg)
SS2
Loaded weight: 9,740 kg (21,428 lb)
per Wikipedia
so ~3x
considering that they are going from one pilot (SS1) to two + 6 passengers.. that's light.
also note that the A-12 (SR71) had a service ceiling of 95,000 ft. (Absolute ceiling I would expect to be a good deal higher)
...they were punching around at Mach 3.5, and at that altitude, in the 60's - the 60's! ... and doing that speed/alt w/o rocket propulsion. -- I would rather have a ride in one of those old-school Ti air-breather jets than in these CF "space" ships. --ymmv
__________________
Everyone you meet knows something you don't. - - - and a whole bunch of crap that is wrong.
Disclaimer: the above was 2¢ worth.
More information is available as my professional opinion, which is provided for an exorbitant fee. 
Last edited by island911; 11-01-2014 at 12:34 AM..
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