Eastern Railroad Discussion > What causes this whine ?

Over the years I've seen plenty of EMD units that had a high pitch whine as they passed by, this train seemed to be louder than normal. Thinking about it , I really don't know the exact cause of it. What causes this whine and why are some louder than others ? This was NS 310, climbing Attica(NY) hill and again a little further east of Attica on Friday July 11th.

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sounds like a screaming SD-60 turbocharger to me. Maybe the 70M also.



Edited 1 time(s). Last edit at 07/12/14 14:10 by pdt.

Was he going downhill or about to stop because it sounds like the dynamic brakes to me.

Yep...loud turbos....Dave W

Posted from Android

If the rotor of a turbocharger get's "nicked" or "scarred" for any reason......It will whine at approximately the hertz of its rotation.

Frontrunner Wrote:
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> Was he going downhill or about to stop because it
> sounds like the dynamic brakes to me.


He mentioned that the train was climbing a hill....The SD60 and 70 series do not have that old dynamic brake fan whine that the SD40's had....they have more of a roaring sound on the 60's and 70's when in dynamic from the fans....Dave W

Posted from Android



Edited 1 time(s). Last edit at 07/12/14 15:04 by dwi189.

The GE not doing its share of the pulling.

EMD locomotive make a whine when there is a traction motor cut out

dynamics and traction motors are not the sound you are hearing. It is 110% a turbocharger get ready to go

Trains247 Wrote:
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> dynamics and traction motors are not the sound you
> are hearing. It is 110% a turbocharger get ready
> to go

ES44DC in the lead .......... soon to be another 'GE toaster'? :-)

upmodeler Wrote:
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> The GE not doing its share of the pulling.

Do they ever pull their fair share of the load. If they are leading, they are being pushed and if trailing, they are being pulled, GE's, AKA, GE Junkers!

Posted from iPhone

EL-SD45-3632 Wrote:
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> upmodeler Wrote:
> --------------------------------------------------
> -----
> > The GE not doing its share of the pulling.
>
> Do they ever pull their fair share of the load. If
> they are leading, they are being pushed and if
> trailing, they are being pulled, GE's, AKA, GE
> Junkers!
>
> Posted from iPhone

At track speed they are great, I prefer their comfort over an EMD any day of the week, but you are right as a leader they load slow and get pushed as a trailer being pulled, EMD and GE both have their benefits and disadvantages

Posted from Android

biff Wrote:
-------------------------------------------------------
> Over the years I've seen plenty of EMD units that
> had a high pitch whine as they passed by, this
> train seemed to be louder than normal. Thinking
> about it , I really don't know the exact cause of
> it. What causes this whine and why are some louder
> than others ? This was NS 310, climbing Attica(NY)
> hill and again a little further east of Attica on
> Friday July 11th.

Its called a "Howler" The Fins on the Turbo's fans are getting worn and the turbo is about to fail!!
The next thing that will happen if its not replaced is clouds of thick black smoke out of the stack because the turbo cannot produce enough boost (Fresh air pushed into the cylinders under pressure) to burn all the fuel injected into the cylinders. This is called "Over Fueling"

Those 2 runbys are all around beautiful!

twl

GE Junkers = GEunkers
ALLEN

EL-SD45-3632 Wrote:
-------------------------------------------------------
> upmodeler Wrote:
> --------------------------------------------------
> -----
> > The GE not doing its share of the pulling.
>
> Do they ever pull their fair share of the load. If
> they are leading, they are being pushed and if
> trailing, they are being pulled, GE's, AKA, GE
> Junkers!
>
> Posted from iPhone


GE's will out pull any EMD any day. And yes, that noise sounds like the turbo is kinda wacked out.

SantaFeRuss



Edited 1 time(s). Last edit at 07/13/14 17:37 by SantaFeRuss.

The train is also going by at a constant speed, + another 1 to the turbo being on it's way out.

Not so, it was the train and I could hear the loud whine long before I could see the train and the camera was not turned on yet. That was at both locations, and those two locations are over five miles apart.

MartyBernard Wrote:
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> It's not the trains. The whine is constant all
> the time. It has to be the camera or a noise
> near the camrea.
>
> Marty Bernard

Posted from iPhone



Edited 1 time(s). Last edit at 07/14/14 08:25 by biff.

I've heard that out of an ACe when the ODOWP/OWPDO had a trio of ACes awhile back. It's definitely not camera related.

Sounds to me like a pair of EMD Turbochargers wound all the way up, with the throttle in Notch 8!

A beautiful railroad sound if you ask me!

~RGDave