Re: [ERPS] blowdown SSTO

[Ian Woollard]

Henry Spencer wrote:

On Wed, 5 Mar 2003, Ian Woollard wrote:
  

Yes, it's about equal to what the Titan II first stage achieved in 1961.
For some reason, matching that does seem to be a big challenge.
      

Encyclopedia Astronautica:
      <http://www.astronautix.com/stages/titan21.htm> Gross Mass:
      117,866 kg. Empty Mass: 6,736 kg...
    

Unfortunately,

Fortunately.

I want a low number ;-)

 Isakowitz3 (International Reference Guide to Space Launch
Systems, AIAA) says gross 122t, empty 4t.

Sounds good. The 4t figure must has been rounded however; I'd bet they rounded it down. but it still sounds good.

  It's not clear where the EA
numbers come from; the Isakowitz3 numbers come direct from the launcher
suppliers. 

They may both be 'correct' of course, it's entirely possible there was multiple versions. But either or both could be wrong.

                                                          Henry Spencer
                                                       [EMAIL PROTECTED]
  

-- 
-Ian

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