Article View: sci.space.shuttle
Article #3987Re: Throttling the Challenger
From: Steve Grandi
Date: Sat, 24 Oct 1987 17:51
Date: Sat, 24 Oct 1987 17:51
17 lines
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1689 bytes
In article <8822@utzoo.UUCP> henry@utzoo.UUCP (Henry Spencer) writes:
>Actually, before Challenger there were plans to start using 109% for heavy
>payloads. Those plans are now officially cancelled, although they could
>re-surface later if things go well and various minor engine improvements
>do indeed make the things more durable.
This "downscoping" of the shuttle thrust is causing major problems for
heavy payloads such as the Hubble Space Telescope. Rumor hath it that the
current worst case projection (depending on the amount of solar activity
during the upcoming solar maximum which affects orbital drag) gives a
lifetime in orbit for HST after a 100% thrust launch of around 5 months!
It has always been planned to "reboost" HST during subsequent shuttle
missions, but no one quite thought it would have to be so soon!
--
Steve Grandi, National Optical Astronomy Observatories, Tucson AZ, 602-325-9228
UUCP: {arizona,decvax,hao,ihnp4}!noao!grandi or uunet!noao.arizona.edu!grandi
Internet: grandi@noao.arizona.edu SPAN/HEPNET: 5356::GRANDI or DRACO::GRANDI
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!mnetor!uunet!husc6!hao!noao!grandi From: grandi@noao.arizona.edu (Steve Grandi) Newsgroups: sci.space.shuttle Subject: Re: Throttling the Challenger Message-ID: <648@noao.UUCP> Date: Sat, 24-Oct-87 12:51:14 EST Article-I.D.: noao.648 Posted: Sat Oct 24 12:51:14 1987 Date-Received: Mon, 26-Oct-87 02:13:07 EST References: <187@scdpyr.UUCP> <8822@utzoo.UUCP> Reply-To: grandi@noao.arizona.edu (Steve Grandi) Organization: National Optical Astronomy Observatories, Tucson AZ Lines: 17 Keywords: "Throttle up call"