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- Xref: sparky sci.energy:6462 sci.electronics:21643 rec.autos:30596
- Path: sparky!uunet!news.claremont.edu!nntp-server.caltech.edu!SOL1.GPS.CALTECH.EDU!CARL
- From: carl@SOL1.GPS.CALTECH.EDU (Carl J Lydick)
- Newsgroups: sci.energy,sci.electronics,rec.autos
- Subject: Re: Popular Science Fly Wheel Article
- Date: 28 Dec 1992 19:35:01 GMT
- Organization: HST Wide Field/Planetary Camera
- Lines: 24
- Distribution: world
- Message-ID: <1hnkt5INNnna@gap.caltech.edu>
- References: <1h3t1nINNddb@sportster.ksu.ksu.edu> <1h41jqINNn2j@gap.caltech.edu>,<1992Dec21.191923.19719@adobe.com>
- Reply-To: carl@SOL1.GPS.CALTECH.EDU
- NNTP-Posting-Host: sol1.gps.caltech.edu
-
- In article <1992Dec21.191923.19719@adobe.com>, pngai@adobe.com (Phil Ngai) writes:
- =In article <1h41jqINNn2j@gap.caltech.edu> carl@SOL1.GPS.CALTECH.EDU writes:
- => 2) They've reduced the energy stored in each flywheel. I'd be happier
- => if they were using about 500 flywheels, but 20's a start. They're
- => now only talking about something like 2 sticks of dynamite
- => equivalent in the event of a flywheel failure.
- =
- =Wouldn't you expect that a containment failure in one would quickly
- =cause all the others to fail too? Wouldn't 20 flywheels in general be
- =more likely to have one failure than one flywheel would, assuming the
- =same levels of margin were engineered into both designs?
-
- Yes to both questions. However, the critical question is "how quickly?" Even
- spreading the failure of all the flywheels over a period of a couple of seconds
- would represent a vast improvement over the catastrophic failure of a single
- flywheel.
- --------------------------------------------------------------------------------
- Carl J Lydick | INTERnet: CARL@SOL1.GPS.CALTECH.EDU | NSI/HEPnet: SOL1::CARL
-
- Disclaimer: Hey, I understand VAXen and VMS. That's what I get paid for. My
- understanding of astronomy is purely at the amateur level (or below). So
- unless what I'm saying is directly related to VAX/VMS, don't hold me or my
- organization responsible for it. If it IS related to VAX/VMS, you can try to
- hold me responsible for it, but my organization had nothing to do with it.
-