A number of people (including this person) have been encountering problems with locos slipping in the current version of OR. Now the problem appears to be MSTS's behavior here is NOTHING like reality, where as OR's is now much better in this respect.
Now Diesel Electric loco's are true "constant power" machines. each notch in the throttle sets up the engine and traction system to put out a SPECFIC amount of power. This results in the loco's tractive effort falling off in proportion to the inverse rate of speed increase, if you double the speed in a given notch setting the tractive effort halves or more important if the speed halves for a given notch setting the tractive gffort doubles.
On these locos it appears notch 1 and 2 are there to take up slack in the couplings. According to the EMD maintence manual (and asking a couple of drivers) load meter currents (for locos 2400 to 3300BHP) is 300 to 400 amps N1 and around 800 to 1000 amps N2. N3 and above the system will try and put the maximum (or more) current into the traction motors. Now if one is going slow this WILL produce slip (for N4 and above). Under these conditions most DE's in MSTS do NOT do that that. Thus leeding to one being very "ham fisted" in driving. The correct way is to take things slowly amd wait to see what happens.
Now a good bit of advice when tryng to control ANYTHING large and heavy either in a sim or in real life is to be slow and easy. Thing of this size do not do ANYTHING quickly and one has a tendency to over react and try to speed the process up the result usually being to get one self in a right "pigs breakfast". What you have to do is try a small control input and wait for the reaction, very large machines such as ships or trains such as the iron ore trains in NW Western Australia may take many seconds or even minutes to react. If one try's to speed things up one has an excellent chance of breaking something seriously, including your self.
I have had some problems with this but now have sucsessfully driven the loaded 33,000 ton train from the BHP route over the ranges and half way to port hedland without running out of brakes or any other problems.
The load current meter though still does not appear to be behaving as it should which does make things slightly more difficult.
Hope this explanation helps,
Lindsay
Now Diesel Electric loco's are true "constant power" machines. each notch in the throttle sets up the engine and traction system to put out a SPECFIC amount of power. This results in the loco's tractive effort falling off in proportion to the inverse rate of speed increase, if you double the speed in a given notch setting the tractive effort halves or more important if the speed halves for a given notch setting the tractive gffort doubles.
On these locos it appears notch 1 and 2 are there to take up slack in the couplings. According to the EMD maintence manual (and asking a couple of drivers) load meter currents (for locos 2400 to 3300BHP) is 300 to 400 amps N1 and around 800 to 1000 amps N2. N3 and above the system will try and put the maximum (or more) current into the traction motors. Now if one is going slow this WILL produce slip (for N4 and above). Under these conditions most DE's in MSTS do NOT do that that. Thus leeding to one being very "ham fisted" in driving. The correct way is to take things slowly amd wait to see what happens.
Now a good bit of advice when tryng to control ANYTHING large and heavy either in a sim or in real life is to be slow and easy. Thing of this size do not do ANYTHING quickly and one has a tendency to over react and try to speed the process up the result usually being to get one self in a right "pigs breakfast". What you have to do is try a small control input and wait for the reaction, very large machines such as ships or trains such as the iron ore trains in NW Western Australia may take many seconds or even minutes to react. If one try's to speed things up one has an excellent chance of breaking something seriously, including your self.
I have had some problems with this but now have sucsessfully driven the loaded 33,000 ton train from the BHP route over the ranges and half way to port hedland without running out of brakes or any other problems.
The load current meter though still does not appear to be behaving as it should which does make things slightly more difficult.
Hope this explanation helps,
Lindsay
Comment