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- Path: sparky!uunet!gatech!pitt.edu!karol
- From: karol+@pitt.edu (Filip M. Gieszczykiewicz (fmgst+@pitt.edu))
- Newsgroups: sci.electronics
- Subject: Re: Flywheel batteries as EV power source
- Summary: simple example
- Message-ID: <1335@blue.cis.pitt.edu>
- Date: 3 Jan 93 15:39:31 GMT
- Sender: news+@pitt.edu
- Followup-To: sci.electronics
- Organization: University of Pittsburgh
- Lines: 31
-
- In article <1hnu1lINNnna@gap.caltech.edu> carl@SOL1.GPS.CALTECH.EDU writes:
- >
- >Wrong shock wave. You see, what we've got is a highly stresed flywheel. If
- >some bit of it separates, then the stress on the rest of the flywheel changes.
- >Because of the degree of stress involved. This change in stress propagates as
- >a shock wave THROUGH THE MATERIAL OF THE FLYWHEEL. Because of the speeds and
- >stresses we're talking about here, that shockwave travelling through the
- >flywheel is likely to be enough to cause catastrophic failure of the rest of
- >the flywheel.
-
- Greetings. While this may be hard for some folks to visualize,
- I can attest. A friend of mine was flying a twin engine
- plane when one of the propeller blades splintered. He said that
- the whole plane vibrated so badly that he could not see clearly.
- The procedure is to reduce speed to idle and land AS FAST as
- possible. I have seen pictures of what happens when a single
- engine plane breaks a WHOLE propeller blade and it ain't pretty!
-
- (FYI: read some accident reports that the FAA has about some
- of the prop failures and you'll see that a flywheel with just
- a tiny bit missing is in danger/process of vaporizing... Also,
- in case anyone wants to fool around, the FAA BBS number is
- 1-800-245-3828 but be considerate for the pilots who use it)
-
- Take care and remember the ultimate rule of every pilot:
- "You're ALWAYS looking for a place to land."
- --
- -------------------------------------------------------------------------------
- DO NOT REPLY HERE. REPLY TO "fmgst+@pitt.edu". THANK YOU. If that doesn't work,
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- Teenie serial# 1: all-Al, 285lb, low-wing, 53 hp, 120 knts, experimental plane!!
-