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Delta-IV Heavy First Flight Status & Delta-IV Growth Options
According to the launch schedule at:
http://www.spaceflightnow.com/tracking/index.html the first flight of the Delta-IV Heavy has slipped to "Mid October". I went surfing to see if I could find out any details on why the flight slipped, but couldn't find much. I did find a "Delta-IV Heavy First Flight" page at: http://www.boeing.com/defense-space/...y/sitemap.html One of the PDFs linked from this site is this little gem: http://www.boeing.com/defense-space/...th_options.pdf Its very similar to slide 7 of: http://www.spacecongress.org/2004/Panel-4/2Collins.pdf, which was presented at the 2004 Space Congress, but adds a few details - and in fact answers some points that were raised in the "Delta 4 : heavier and bigger" thread on here a couple of months ago. (see http://groups.google.com/groups?hl=e... .196.105.134 for the beginning of the thread ) Simply put, the RS-68B is indeed an upgraded version of the RS68, with the RS-68 Regen being a RS-68 with a regenerative nozzle. 'Dens' was indeed Cryo Propellant Densification. Al-li is Aliminium Lithium Lightweight material. One thing I did find interesting is that Boeing are at least looking at upto 6.5M payload fairings with pad mods. The RS-800 seems to be a paper engine at present (Althugh, I guess they know how powerfull they want/need it to be) The AUS referenced would appear to be a similar spec to the MB-60, which according to http://www.boeing.com/defense-space/...opul/mb60.html should be avaliable 'now'. Iain |
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