serre@boulder.Colorado.EDU (SERRE GLENN) (11/05/90)
In article <1469.27304918@ofa123.fidonet.org> Charles.Radley@f2505.n206.z1.fidonet.org (Charles Radley) writes: >From: ghudson >Date: Tue, 30 Oct 90 21:24:34 EST >To: cradley >Any "HLV" will require new engines, built from scratch. This is Actually, this is not quite true. The following are two options for a Titan IV upgrade to "HLV" (if you mean ~100K pounds when you say "HLV"). 1) Raise core diameter to ~14 feet (from 10 feet) to provide twice the volume. Supply Stages I and II with twice the current number of engines, the same engines as are currently flying ( makes 4 for Stage I, 2 for Stage II. ). Put 4 SRMs around Stage I (Salt to taste :-) and launch. 2) Develop LRBs for Titan (They would be stretched 14 foot diameter cores with 4 engines each and cross-feed to Stage I, which would burn in parallel with the LRBs.) Substitute LRBs for the SRMs in option 1) (No added salt :-) and launch. Note that neither of these options require new engines, and that option 2) uses engines that been flying since the first Titan II was launched. A further option, one that I would like to see, is to strap two Titan IVs together ( a la the Delta HLV proposal), build an payload adapter for the top, and launch. --Glenn Serre serre@tramp.colorado.edu
crad@polari.UUCP (Charles Radley) (11/06/90)
Memo #58733 From: ghudson Date: Sun, 4 Nov 90 21:46:39 EST To: cradley Message-Id: <memo.58733> In-Reply-To: <memo.58531> Subject: Reply to your comments Thanks for your mail. I don't much care for heavy-lift vehicles since "lift" is not our problem: access to space is. We must learn to walk before we run: only a smaller vehicle like Phoenix can do this economically. I also like to remind people that the Berlin airlift was conducted with aircraft which had about the same cargo lift capacity as the Phoenix...