Happy New Year!

[kujuSabrina]

Hope you all had a splendid new year celebration!

Well to kick start the new year we have a technical piece for you - go see at www.railsimulator.com

[plainsman]

Although the technical discussion is really aimed in a different direction, this really brings up one of the limitations of MSTS, and a limitation I hope can be resolved for KRS.
In North America, a lot of locomotives have a condition of power limiting that affects the power curve of the locomotive. A Good example of this would be a GP40-2, which is rated as a 3,000 HP locomotive with 4 axles. Because the traction motors in this design could not absorb the full output, this locomotive goes into power limiting status at about 25 mph, and by its minimum continuous speed of slightly over 11 mph, it is only producing 2,000 HP. I would like to have provision to have a power limited power curve in KRS (it can't be done in MSTS).
As to the topic discussed in the article, I think this has interesting implications for modeling shunting and transition as it is commonly discussed over here. Different locomotives have different ways to maintain appropriate voltage, amperage, and counter-emf. Some locomotives like GE Dash 8 and 9 units, have the TMs permanently connected in parallel. Other locomotives have multiple stages of shunting to account for counter-emf. Some have simple shunting in a single stage. It would be helpful to those of us doing physics modeling , to have the ability to appropriately handle each of these situations.
Hope this is helpful,
Bob Boudoin
BTW, I could discus this in much more technical detail, but I am not sure this thread is the place to make that discussion?

[ragtimer]

How do you propose to deal with the sound produced by the diesel engine when the field weakening occurs?How will you model a Class 60 which is different to every other diesel locomotive I know?

[kujuSabrina]

>How do you propose to deal with the sound produced by the
>diesel engine when the field weakening occurs?How will you
>model a Class 60 which is different to every other diesel
>locomotive I know?


Our sound engineers are working on creating sound events for the field diverts on the 47 and 55 (we're not modelling the 60!).

We should be able to dig out details when they've completed the setup of sim :)