Re: Turbines

["Chris and Ranae Procyk" <procyk19@domain.elided>]

>NO--although I am not familiar with the Pennsy S-2's.

"The" (as in one and only) S2!  It looked just like a regular steam engine
except w/out pistons, and it was a true steam turbine from Westinghouse.
You're right, some of the others were gas turbines- why did they need the
extra water tender?

>"messed around with"--they saw main line freight service between Ogden and
>Cheyenne for many years. Mostly on the big grades between Ogden and Green
>River and between Cheyenne and Laramie (the "Sherman" grade). The combined


Did you ever see the picture of one of them lashed up with a Big Boy?
Pretty neat shot.

>cycle locomotive I mentioned seeing--which was not publicized that I know
>of--appeared to be a gas turbine electric with a (condensed) recip steam
>bottoming cycle.


Mebbie that was the one with the two tenders.

>
>The problem with gas turbine economy is not AS much with variable speed
>operation, although that is certainly a factor,  as it is with part LOAD
>operation. Turbines are grotesquely inefficient at part load unless they
>use a regenerative cycle. (A regenerator is a heat exchanger which captures
>heat from the exhaust to pre- heat the compressed air prior to the
>combustor.)
>
>Regards, Greg
>
>
>