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- From: wolfgang@nosc.mil (Lewis E. Wolfgang)
- Newsgroups: rec.railroad
- Subject: Re: Why do GE's "Chug"?
- Message-ID: <1992Nov17.020902.28169@nosc.mil>
- Date: 17 Nov 92 02:09:02 GMT
- References: <1992Nov16.191450.11555@athena.mit.edu>
- Sender: usenet@nosc.mil (Network News)
- Reply-To: wolfgang@nosc.mil
- Organization: NCCOSC, NRaD Division
- Lines: 27
-
- In article 11555@athena.mit.edu, jcarnold@athena.mit.edu (John C Arnold) writes:
- > Does anyone have any thoughts on the exhaust note of GE's
- >engines? They seem to have a distinct "chugging" sound, particularly
- >at low speed. The problem I have is that the chugs seem to be too
- >infrequent, coming on the order of once (maybe several times) per
- >second, whereas the exhaust pulses from a four cycle V-16 at
- >a few hundred RPM (idle) should come 30-50 times per second. I have
- >also noticed that both the U18's and C424's in our area have
- >a more rapid exhaust note than the big boats.
- >
-
- Hm, could it be governor hunting? Perhaps one injector being
- adjusted too "rich", so that it's cylinder is the only one you
- hear? How about the configuration of the exhaust manifold? Maybe
- the cylinder closest to the end is the one you hear. I had an
- old Buda diesel in a fishing boat that had this characteristic.
-
- I know that you can manually overide a single cylinder's injector
- on our Alco RS-2 and you can then hear it chugging to beat the band!
- Since that one overloaded cylinder is outputing more power than the
- other cylinders, the governor shuts them down and you can't hear
- them at all.
-
- Good Iron,
- Lewie
- wolfgang@nosc.mil
- San Diego Railroad Museum
-