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- Path: sparky!uunet!olivea!hal.com!decwrl!zazen!doug.cae.wisc.edu!longstre
- From: longstre@cae.wisc.edu (Jon Longstreth)
- Newsgroups: sci.engr.mech
- Subject: Re: modified turboprop into car
- Message-ID: <1992Sep8.233727.25617@doug.cae.wisc.edu>
- Date: 9 Sep 92 04:37:27 GMT
- References: <Yeb7VDe00VpKQ67kkH@andrew.cmu.edu> <25348@castle.ed.ac.uk> <24476@oasys.dt.navy.mil>
- Organization: College of Engineering, Univ. of Wisconsin-Madison
- Lines: 25
- Originator: longstre@ws-39.cae.wisc.edu
-
-
- In article <24476@oasys.dt.navy.mil>, paraska@oasys.dt.navy.mil (Pete Paraska) writes:
- |> I seem to remember one of my engineering instructors telling us that
- |> turbine engines in cars would not be feasible since the output shaft
- |> speed for efficient operation was so large compared to the speed needed
- |> for input to a typical automobile transmission.
- |>
- |> It seems that very large gear ratios would be needed to bring the "efficient"
- |> turbine engine output shaft speed down to a range that a car can use.
- |> Therefore, a large reduction gear train would be needed.
- |>
- |> Am I wrong here?
- |>
- Actualy, as I remember (and someone correct me if I'm wrong)
- there are a couple of minor draw backs to gas turbine engines for cars
- (spinning too fast not being one of them)
-
- They tend to produce conentrations of NOx's that are too high for
- EPA standards.
-
- They aren't as efficient when made small enough to fit nicely in a car.
- (something about efficiency of small blades)
- --
- Jon Longstreth : CAE unix system staff Dept. of Shade Trees
- longstre@cae.wisc.edu :"It's only water, in a strangers tears." -Peter Gabriel
-