PC Skyhook Please Fix The Dynamic Brakes On Hsc

Discussion in 'Troubleshooting' started by Sharon E, Apr 23, 2022.

  1. Sharon E

    Sharon E Well-Known Member

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    The way the dynamic brakes are set up for the ES44AC in the simugraph is unworkable. You can apply notch 1 on them and one time get a klb of 14, next time it might be 23. Also, when you reduce them, they do not come off like they should but remain high. They should go on in steps just like the throttle applies power in steps. Another thing, in these newer locomotives, you cannot have both the independent, loco brake, and the dynamics on at the same time. If the engineer does not bail the independent, the dynamics will come off. Finally, when you go into setup on the dynamics, there is a delay before they will begin to work. This allows the control circuits to adjust.

    Thanks
     
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  2. Matto140

    Matto140 Well-Known Member

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    General shape of speed/force curve looks OK, but there is very limited control for it.
    On first notch 1.0-13% you get:
    29kLb@5mph
    30kLb@10mph
    30kLb@15mph
    25kLb@20mph
    21kLb@25mph
    18kLb@30mph
    16kLb@35mph
    14kLb@40mph
    13kLb@45mph
    12kLb@50mph
    11kLb@55mph
    10kLb@60mph
    This minimal set is 25% of total capability.
    Normaly you should be able to set any force up to maximum which is limited in speed range like on SD70.
     
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  3. kirbyfisher69

    kirbyfisher69 Member

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    I have seen an issue with the dynamic braking in HSC also. On Will Wet Coal Burn, applied 22% and got 30kLb. Applied 24% and got 66kLb. There is no middle ground. Scaling is all wrong.
     
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  4. DarkWolf

    DarkWolf Active Member

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    Yeah, I hope they can apply the same kind of dynamic brake mechanics they have on the SD70 to other routes. The SD70 is really nice the way you can fine tune the brake force and maintain a steady speed. With the ES44AC you're kinda ham-fisting it, feathering between too much and too little force.

    DW
     
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