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- Path: sparky!uunet!olivea!decwrl!csus.edu!netcom.com!nagle
- From: nagle@netcom.com (John Nagle)
- Newsgroups: sci.engr.mech
- Subject: Re: modified turboprop into car
- Message-ID: <2xcngjf.nagle@netcom.com>
- Date: 27 Aug 92 17:55:17 GMT
- References: <Yeb7VDe00VpKQ67kkH@andrew.cmu.edu>
- Organization: Netcom - Online Communication Services (408 241-9760 guest)
- Lines: 34
-
- Eric Eimal Paulsen <ep1a+@andrew.cmu.edu> writes:
- >What's the feasibility of putting a heavily modified turboprop engine
- >into a car? With the prop removed(of course) ,the shaft running out the
- >back instead of the front, a turbine compressor on the front with
- >variable bypass, and appropriate gearing? It seems to me this would make
- >a pretty high performance car with greater fuel efficiency.
-
- A few years ago, someone in LA put a helicopter turbine in a
- car. They used the backup turbine from Gratenelli's 1969 Indy car.
- (which nearly won Indy that year, but after being many laps out in front
- for most of the race, had a transmission failure near the end. Turbines
- were then banned at Indy.)
-
- The LA people used a Corvette as the platform, needing a long
- engine compartment. The turbine was rated at 1500hp continuous, I think.
- One of the car mags wrote this up, along with dragstrip performance
- figures.
-
- Basic problem with turbines in a car is that you don't need much
- power at cruise (maybe 7-10hp in a modern car) and turbines are inefficient
- at very low power settings. Turbines also have far more expensive
- construction and metallurgy than reciprocating auto engines (which actually
- cost only about $100 to make). Chyrsler built some demo turbine cars
- in the 1960s, but never went to production. Ford built some demo trucks
- in the 1970s, but never went to production. The M1 tank is turbine
- powered, and there have been a few other experiments, mostly for large
- vehicles.
-
- Greyhound, in the 1970s, tried hard to get someone to make them
- turbine-powered buses, hoping to improve the quality of bus travel and
- compete with the airlines. They couldn't find anybody to make them.
- So they reduced the quality of bus travel instead.
-
- John Nagle
-