After spending some time driving the class 313 on East coastway I have found the train to be annoying to drive, mainly the acceleration. Not a bug report but just a question about whether this is normal or if this is actually just an issue which hasn't been fixed (I have never driven one in real life, so I wouldn't know). - from notch 0-1 on the throttle the train will speed up from 0-3mph almost like it was in launch control in a race. (from 1-2 its alot more calm) - from 2-3 it does another very quick jump in acceleration despite only being a single notch. - from 3-4 it does another reasonably sized jump in acceleration. - when the throttle is moved from notch 4 - 1 the train will continue to accelerate as if its still in notch 4, and only when you put the throttle into idle it will stop. (edit: its realistic) here is a video which demonstrates it:
The last element is correct; it's a feature of this train's cam-driven transitions. In other words, the only way to reduce throttle is to decrease it to Off, then set to the new speed.
That's a Camshaft controller... In order to reduce the power from nth notch to (n-1)th notch, you'll have to turn the power OFF by putting the controller to Idle, then raise the power back to (n-1)th notch. Can't comment on how prototypical the acceleration is... but I prefer applying power gently; that prevents the jerk.
how do to reduce the jerk? since the jerk still exists for me even when i apply power gently, it does it right when you put it in notch 1. you can see in the video
The physics of the Class 313 is slightly bugged still - if you use notch 4 below 30 mph you will encounter a similar jerk with momentary wheelslip, and if decelerating above 50 mph on downhill gradients with the regen brake enabled the train will also jerk when you apply the brakes in step 1. Something similar happens with the 1938 stock on IOW, it wheelslips momentarily and jerks foward even in shunt when accelerating from a standstill. Not sure if simugraph has camshaft physics totally figured out yet. The trains in real life were quite clunky, but not like this. Certainly no wheelslip with the speedometer needle having a fit and blurring out. Definitely feels like a bug. If you compare it to the Class 314 on Cathcart, that unit is almost perfect, albeit with thyristor control rather than camshaft which operates more like an electrostar allowing you to notch down in power rather than moving to off and back up again.
313 has always been weird on acceleration… there isn’t any, as it basically goes from 0 to moving quickly as soon as you move to notch 1; a pain as it really detracts from wanting to use the unit
Imo the problem with the 313 physics/ acceleration is that fact that DTG has mirrored the AP version particularly the Great Northern (GN) version. The train accelerates too fast even when doing a hill start step 1 does nothing to hold the train back, it’s as if the train was running in Ac mode, it even feels much quicker the 314. Slightly off topic but the door sounds are also incorrect for the Southern version, it’s using the GN door sounds when in reality they would’ve sounded closer to the 465s.
For the braking I would suggest turning off the regen brake, that way it will stop the jerking when slowing down and will be like the 314, I can't remember who suggested it in another thread ages ago.
