Path: utzoo!utgpu!watserv1!watmath!att!att!rutgers!ub!boulder!serre
From: serre@boulder.Colorado.EDU (SERRE GLENN)
Newsgroups: sci.space
Subject: HLV Designs (was Re: you Can't Expect A Spa)
Summary: An HLV (Titan in particular) does not need new engines.
Message-ID: <29215@boulder.Colorado.EDU>
Date: 5 Nov 90 00:55:53 GMT
References: <1469.27304918@ofa123.fidonet.org>
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Reply-To: serre@tramp.Colorado.EDU (SERRE GLENN)
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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