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- From: jsloan@ncar.ucar.edu (John Sloan)
- Subject: Re: All-wheel drive???
- Message-ID: <1993Jan22.164530.26648@ncar.ucar.edu>
- Sender: news@ncar.ucar.edu (USENET Maintenance)
- Organization: Scientific Computing Division/NCAR Boulder, CO
- References: <1993Jan22.151141.24959@mailer.cc.fsu.edu>
- Date: Fri, 22 Jan 1993 16:45:30 GMT
- Lines: 59
-
- In article <1jnmm3$qkg@agate.berkeley.edu> robinson@cogsci.berkeley.edu (Michael Robinson) writes:
- >It was a water-cooled bike, but instead of a radiator, it had sort of a
- >boiler affair. They ran steam lines down the front forks to a steam
-
- From article <1993Jan22.151141.24959@mailer.cc.fsu.edu>, by groh@omicron.cs.fsu.edu (Jim Groh):
- > Absolutely correct, it was the Spagthorpe Indomitable.
-
- I take it that this was a completely different design from the one that
- had the small radial-engines, not unlike miniture versions of those
- used in WWII vintage aircraft, acting as both motive force and as front
- and rear wheels? I recall that they had several problems with this
- design:
-
- o Unsprung weight was a problem, although the center of gravity was
- extremely low. This model was not fitted with a center stand, a side
- stand, or any kind of stand. Apparently it could easily be balanced to
- stand upright even on its narrow tires with no other means of support.
-
- o The seals around the axles had a tendency to leak gasoline. A
- suitable gasket material and lubricant was never developed. This
- ultimately led to the cancellation of the plan to store gasoline in the
- tires, rather than in the gas tank, more of a fuel bladder really, that
- doubled as the rider's seat, although this had the advantage of the
- rider's weight pressurizing the fuel system. However, the bike never
- idled well unless someone was sitting on it.
-
- o Fuel was fed through the frame down through the front forks and the
- rear shocks, which made the bike especially hazardous in a crash.
- However, one-way valves and natural suspension action served as an
- effective fuel pump.
-
- o The tires frequently melted due to high cylinder head temperatures.
- I know that water jackets were tried briefly, which worked as long one
- did not want to turn, and as long as speeds were low. Centripedal force
- apparently forced water high into the cylinder heads and made its
- return to the spinning radiators which stuck out on either side of the
- axles problematic.
-
- o At high speeds, the spark plugs were frequently thrown from their
- holes, which frequently entangled the spark plug wires in the spinning
- engine. This resulted in frequently reboring of the holes to install
- new plugs.
-
- o There were several lawsuits, I recall, from pedestrians who were
- clipped by the rather wide (and hot) "wheels" when the machine was
- ridden through town. Not to mention the few that were flayed by
- loose spark plug wires and the still-attached plugs.
-
- A fascinating experiment, one which the march, or at least the stagger,
- of technology will surely eventually make feasible. Rumors abound that
- the new Yamaha RADD forkless front suspension is a first step in a
- secret joint development plan between Yamaha and Suzuki to revive this
- design with a Wankel rotary engine.
-
- --
- John Sloan "Since I've given up hope, +1 303 497 1243
- NCAR/SCD I feel much better." Fax +1 303 497 1137
- Boulder CO 80307-3000 USA jsloan@ncar.ucar.edu
- Logical Disclaimer: belong(opinions,jsloan). belong(opinions,_):-!,fail.
-