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SD-40-2 Locomotive testing?

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  • Member since
    June 2009
  • From: Dallas, TX
  • 6,952 posts
SD-40-2 Locomotive testing?
Posted by CMStPnP on Sunday, May 12, 2024 11:04 AM

I am curious, what are they doing here specifically with the loco.   Are they testing transitioning between run levels of the Diesel?

https://www.youtube.com/watch?v=1IXmL4geGMs

Also, did not know they could go that fast on IRM track, which is kind of impressive as well.

 

  • Member since
    September 2003
  • 21,669 posts
Posted by Overmod on Sunday, May 12, 2024 1:01 PM

Overrunning clutch on the turbo not disengaging properly, I think.

They take it carefully to notch 4, then 5, then they try to wipe to 8 but nearly immediately notch back.  If it were not making boost properly it wouldn't have been clear until the prime mover had accelerated to higher rpm.  The alternative might be loading issues.  Be interesting to see what Don Oltmann, Randy Stahl or others 'in the actual know' say about this.

  • Member since
    January 2002
  • From: Canterlot
  • 9,575 posts
Posted by zugmann on Saturday, June 8, 2024 2:43 PM

move throttle fast; make smoke! 

It's been fun.  But it isn't much fun anymore.   Signing off for now. 


  

The opinions expressed here represent my own and not those of my employer, any other railroad, company, or person.t fun any

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