hi there is anyboy able to give me any pointers of this i am running a autorack service on sandpatch with two sd40-2s and when i pass the 50 mile a hour sign close to the 25 mph sign the trains just loose complete grip i tried using sand and nothings working i have tried a hill start gets going but wheels are slipping tried applying sand but doesn't work so i am stranded on the hill when i try the same thing with other engines like the gp38 or the acw4400 it works no issues at all i also tried it on a mixed freight train using 2 sd40-2s and works perfectly no issues any advice ? i am also letting the pressure release to 88 on the display to let the brakes fully release cheers
That's 88 at the front- but the cars at the back haven't released brakes yet. Unfortunately while the GP-38 and AC4400 have working End of Train displays, the SD-40 doesn't. For a hill start, it's best to set full independent brake, release the train brake and give it time to charge fully. Then, before releasing the brake, move the throttle to Notch Three and wait until it passes 300 amps- then release the indy brake. add power one notch at a time as needed. (Oh- also make sure your locos are set up correctly. Do you have any pushers, or is all the traction up front?)
Sand Patch has at least one autorack service with 2 helper locos at the end. If he's dragging those, it would certainly explain a lot. OP, which service exactly are you running?
It does though. It has a working HoTD - you just need to make sure you’ve got the radio fuse turned on.
Just had another thought. Somebody who has been around since the TSW2020 days can correct me if I'm wrong, but I'm pretty sure it's been mentioned that the improved physics in TSW2 means some runs that used to work in the older version with lighter locos are now unviable. Q249 also appears in the timetable for the AC4400 (and the C40-8W if you have that DLC); give it a try with one of those.
The train is only 4600 tons- should be doable for a pair of 40s if the MU is set up correctly. The book sez 6900 horsepower, but that would get you up and over at line speed; 6000 ought to be enough. EDIT: No, 6000 isn't enough; not DC, anyway. 2 SD40s just don't have enough juice for this train. Not only did it choke out on the climb out of Hyndman, but I didn't have enough power for the hill start at all- even with careful brake and throttle juggling and all the sand, it still wound up rolling backwards. Solution: do this with AC4400s.
hi there thanks for the reply i tried it again today i was 3.9 miles from mance but just would not get their i had the rear loco all switches off control,fieldgen,engine run and control the handbrake valve set to cutout and the mu valve set to trail6-26 but still loses traction and just rolls down the hill
Yep. See the edited version of my comment above: I tried it, and two SD40s are not enough to get that train up the hill. One of the services which suffered that fate when they implemented adhesion physics. IOW, you'll need AC4400s or C40-9Ws. (Note that you get the medal for the service no matter what loco you drive).