Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site eneevax.UUCP Path: utzoo!watmath!clyde!cbosgd!ihnp4!mhuxn!mhuxr!ulysses!bellcore!decvax!ittatc!dcdwest!sdcsvax!sdcrdcf!hplabs!qantel!lll-lcc!lll-crg!gymble!umcp-cs!eneevax!hsu From: hsu@eneevax.UUCP (Dave Hsu) Newsgroups: net.columbia Subject: Re: SRB's Message-ID: <580@eneevax.UUCP> Date: Thu, 20-Mar-86 09:21:45 EST Article-I.D.: eneevax.580 Posted: Thu Mar 20 09:21:45 1986 Date-Received: Fri, 28-Mar-86 06:06:33 EST References: <699@ihwpt.UUCP> <345@quest.UUCP> <3311@hplabsb.UUCP> <6488@utzoo.UUCP> <117@brl-sem.ARPA> Reply-To: hsu@eneevax.UUCP (Dave Hsu) Organization: Imperial Widget Research Center, Kingdom of Maryland Lines: 29 In article <117@brl-sem.ARPA> ron@brl-sem.UUCP writes: >> I'm a bit surprised that the hold-downs can't take full SRB thrust -- the >> Saturn V hold-downs could and did take its (rather higher) full thrust, since >> they weren't released until the engines were at full power -- but maybe >> there was some sort of compromise needed in the engineering for the Shuttle >> hold-downs. It would explain the timing. > >I remember watching a film of a test where the shuttle was fired while >being restrained, or was this just the SMEs? > >-Ron The clips of SRB testing that I remember showed them being held down like the Saturn V's tested parts...strapped to the ground in a horizontal position. Perhaps you're thinking of the launch footage, in which the SME's ignite, the whole assembly rocks to one side, and the SRB's are ignited when it squats back to its original position before being released. -dave -- David Hsu Communication & Signal Processing Lab, EE Department University of Maryland, College Park, MD 20742 hsu@eneevax.umd.edu {seismo,allegra}!umcp-cs!eneevax!hsu ARPA n. [acronym for Advanced Research Projects Agency.] An agency of the U.S. Department of Defense established in 1968 to test its defenses against misuse and piracy in the large-scale distributed processing environment. -Stan Kelly-Bootle, "The Devil's DP Dictionary"