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Dynamic Braking and EMD 'E' Units.

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Posted by NickP on Thursday, February 15, 2018 2:27 AM

JustWonderin'

 

 
jeffhergert

The Rock Island didn't (officially) use dynamic brakes.  Their train handling rules forbid engineers from using them when foriegn power happened to be on RI trains.  The dynamics on engines they bought used were disconnected and on some that were eventually rebuilt, removed entirely.  

Jeff

 

 

 

 

Why would using dynamic brakes be banned?  Lack of training on proper usage or something else?

 Some railroads, like the New Haven and Rock Island considered dynamic brakes a maintenance headache. They ordered new power without dynamics and disconnected the systems on used locos so equipped.

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Posted by JustWonderin' on Wednesday, February 14, 2018 9:49 PM

jeffhergert

The Rock Island didn't (officially) use dynamic brakes.  Their train handling rules forbid engineers from using them when foriegn power happened to be on RI trains.  The dynamics on engines they bought used were disconnected and on some that were eventually rebuilt, removed entirely.  

Jeff

 

 

Why would using dynamic brakes be banned?  Lack of training on proper usage or something else?

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  • From: Central Iowa
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Posted by jeffhergert on Wednesday, February 14, 2018 5:55 PM

Overmod

Only four railroads apparently had E8s with DB (a fifth, Rock Island, bought a demonstrator but may never have used its installed dynamic).  Early ones had a 36" fan, later ones a 48" as on E9s.

I am not a SP expert but I think they used that field loop setup on the E8 dynamic and this was only changed going through the GRIP rebuild program later...

 

The Rock Island didn't (officially) use dynamic brakes.  Their train handling rules forbid engineers from using them when foriegn power happened to be on RI trains.  The dynamics on engines they bought used were disconnected and on some that were eventually rebuilt, removed entirely.  

Jeff

  • Member since
    September 2003
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Posted by Overmod on Tuesday, February 6, 2018 11:47 PM

Only four railroads apparently had E8s with DB (a fifth, Rock Island, bought a demonstrator but may never have used its installed dynamic).  Early ones had a 36" fan, later ones a 48" as on E9s.

I am not a SP expert but I think they used that field loop setup on the E8 dynamic and this was only changed going through the GRIP rebuild program later...

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    January 2002
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Posted by M636C on Tuesday, February 6, 2018 11:13 PM

NorthWest

Dynamic braking was first introduced as an option on the E8.

 
If I recall correctly SP had only one E8 but they had a number of E9s which indeed had dynamic brakes, indicated by a 48" fan in the centre of the units between the radiators.
 
Peter
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Posted by NorthWest on Tuesday, February 6, 2018 10:59 PM

Dynamic braking was first introduced as an option on the E8.

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Dynamic Braking and EMD 'E' Units.
Posted by BaltACD on Tuesday, February 6, 2018 10:17 PM

I was reading a book on SP passenger service.  Within the book there was a segment on the Shasta Daylight and the power that hauled it.  It stated that it was originally intended that the power for the train would be EMD E-7's however shortly after the train started operating the power was switched to Alco PA's because the PA's had dynamic braking and the E units didn't.

Did EMD offer dynamic braking as a option on any of their E units?

Never too old to have a happy childhood!

              

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