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- Path: sparky!uunet!ogicse!emory!kd4nc!ke4zv!gary
- From: gary@ke4zv.uucp (Gary Coffman)
- Newsgroups: sci.energy
- Subject: Re: More External-Combustion Info
- Message-ID: <1992Nov18.194325.12702@ke4zv.uucp>
- Date: 18 Nov 92 19:43:25 GMT
- Article-I.D.: ke4zv.1992Nov18.194325.12702
- References: <1992Nov17.071642.22601@leland.Stanford.EDU> <1992Nov17.180135.25760@kakwa.ucs.ualberta.ca> <1992Nov17.205149.18798@aio.jsc.nasa.gov>
- Reply-To: gary@ke4zv.UUCP (Gary Coffman)
- Organization: Gannett Technologies Group
- Lines: 36
-
- In article <1992Nov17.205149.18798@aio.jsc.nasa.gov> mancus@zaphod.JSC.NASA.GOV (Keith Mancus/MDSSC) writes:
- >
- > Given the large mass, slow acceleration, high torque, low noise, etc...
- >I would say that the initial version should be a replacement for large diesel
- >trucks (everything from small Macks to 18-wheelers). This looks like a
- >near-perfect solution, provided that the efficiency is high enough.
- >And I HATE getting behind trucks belching choking black smoke!!!
-
- The Stanley was not a high mass car. It weighed less than a Model T.
- Remember it uses a flash boiler that's no bigger than a juice can
- and a direct drive piston engine that doesn't require a gearbox.
- Steam engines run as happily backwards as they do forwards, all
- it requires is switching a couple of valves, so they don't even
- need a gearbox for reverse. It was not slow either. It held the
- land speed record on Daytona beach during the teens and topped out
- at over 120 MPH. Other "steam wagons", built on the locomotive
- principle, were big and slow, but not the Stanley.
-
- For truck use, however, the flash boiler doesn't generate enough
- steam. You'd have to go to a fire tube boiler that *is* big and
- heavy. It takes about an hour to bring one of these up to temperature,
- and it's a nasty steam explosion risk in a collision. I had to stand
- by and watch an engineer be cooked alive by steam after a railway
- accident. It's not a pretty sight, he screamed for several minutes.
-
- > For some applications, like these "commuter" cars that the electric crowd
- >is pushing, you might want to keep the loop open and eliminate the radiator/
- >condenser and associated weight.
-
- The condenser isn't small, but needn't be terribly heavy since it operates
- under partial vacuum rather than pressure. That vacuum increases engine
- efficiency markedly, and eliminates the need to carry makeup water. At
- 10 MPG of water, the Stanley had to carry a rather heavy makeup water
- tank.
-
- Gary
-