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Problems with Class 105 DMU

Posted: Thu Apr 12, 2018 1:46 am
by jonpd
I recently downloaded the BR Class 105 DMU set for an activity I wanted to create on the LTS route.
In testing them out on OR I find I cannot get them to run over 1 mph at full throttle no matter what gear I select.

I did all the usual things such as making sure all brakes are released, using the shift / key etc.

Are there any changes to the .eng files that are needed to get these to run correctly in OR?

I am currently running version X4103.

Any advice would be appreciated.

P.S. How do you know when you are supposed to shift gears on these units? Is it at a certain speed?

Jon

Re: Problems with Class 105 DMU

Posted: Thu Apr 12, 2018 2:29 am
by coolhand101
There are a couple of threads about this. Do a search for MEP DMUs in OR. But yes, it does require a minor tweak in the ENG files to get them to run faster than 1 mph.

Thanks

Re: Problems with Class 105 DMU

Posted: Thu Apr 12, 2018 12:41 pm
by jonpd
I did that search. Frustratingly it seems that people have figured out what eng file changes need to be made but they don't say what they are. The one discussion about the class 3 chunters got close but then veered off into a discussion about animating the controls in the cabview. Something I may want to revisit once I have the DMU running but for now I need to resolve the eng file issue.

Perhaps there might be a patch posted in the file library? I'll go look there.

Jon

Re: Problems with Class 105 DMU

Posted: Thu Apr 12, 2018 6:37 pm
by 31lima

Re: Problems with Class 105 DMU

Posted: Fri Apr 13, 2018 2:47 am
by coolhand101
There are still a couple of things that MSTS has over OR regarding the DMMUs.

Placing the gears into 1st will allow power to the wheels with zero throttle.(Prototypical)

The reverser can only move when the gears are in neutral(Prototypical).

The gears are soft coded in MSTS via the ENG gear controller section. This allows the one notch from gear 4 to neutral and slamming the gears fully forward for 1st gear.
In OR, the gears are hard coded and the gear controller ENG section has no use.

However OR allows the engine to be disconnected from the wheels at zero throttle.
Not as effective as the flywheel, but you can go faster coasting downhill.

It would it be nice to see the temperature rise on how your driving skills work. ie high substain RPMs in lower gears, over revving the engines by wrong gear at the required road speed. Not placing the gears in neutral just before zero speed. The high temperature can affect the performance of the train and requires you to pay attention to your driving skills.

I believe in real life, it was possible to switch gear without closing the throttle. But this was frowned upon as the gearbox would over heat and would probably cause damage with continuing use of this method.

Thanks

Re: Problems with Class 105 DMU

Posted: Mon Apr 16, 2018 12:26 am
by jonpd
I was able to get the Class 105 running by making some changes suggested by an .eng file posted over at Elvas Tower.

Re: Problems with Class 105 DMU

Posted: Mon Apr 16, 2018 2:39 am
by coolhand101
jonpd wrote:I was able to get the Class 105 running by making some changes suggested by an .eng file posted over at Elvas Tower.
Maybe we can start fully tweaking these DMUs in OR for prototypical performance using the current OR parameters, ORTS engines and the newer vacuum brake modes/tokens?

Thanks