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- Xref: sparky sci.electronics:21406 sci.energy:6367 rec.autos.tech:17074
- Newsgroups: sci.electronics,sci.energy,rec.autos.tech
- Path: sparky!uunet!haven.umd.edu!socrates!jimbo
- From: jimbo@socrates.umd.edu (Jim Bogard)
- Subject: Re: Flywheel batteries as EV power source
- Message-ID: <1992Dec22.200442.25999@socrates.umd.edu>
- Organization: University of Maryland University College
- References: <1gov35INNik@gap.caltech.edu> <1992Dec17.170002.28389@u.washington.edu> <1gqhdqINNjot@gap.caltech.edu>
- Date: Tue, 22 Dec 1992 20:04:42 GMT
- Lines: 35
-
- A thought or 2...
-
- I remember reading an article in Scientific American or somesuch about
- high-tech flywheels. One of the designs that stands out in my mind
- was one made of wood laminates and would store a large percentage of
- its energy in deformation. That is, the thing started out in roughly
- a square shape, then as it spun up, it would flex out into the
- normal circular shape. Recalling from Physics, as a rotating mass
- moves in a shorter radius, the rotational momentum must remain
- constant, so the spinning speed increases - allowing one to tap the
- power available in the return to the original shape.
- Plus, it's not unappealing that the thing was constructed partially
- of wood... projectiles would be easier to contain.
-
- Has anyone considered using springs as an alternative to flywheels?
- It seems to me (very topically) that while the same amount of power
- could be stored in a (unknown adjective - the type of spring used
- in clocks, as opposed to your screen door slammer spring) spring,
- it would be much safer.
- There would be no high velocity particles to contend with -
- In the event of spring breakage, or uncontrolled release, It seems that
- the actual outward force would be fairly easy to contain. In addition,
- the spring material (spring steel, or some derivative thereof) could
- be relatively light and less prone to cause ballistic injury.
- (At least, I'd prefer it to a flywheel with the same amount of energy!)
-
- This is interesting, keep it up.
-
- J-.
-
- --
- Jim Bogard (jimbo@socrates.umd.edu)
- "Implement now, tweak later."
- Tech at large / gigging daemon
-
-