Suggestion: Dynamic brake operation.

[seagoon]

May I make the following suggestion to the development team, please?

My understanding is that when moving from throttle to dynamic-brake operation there must be a delay between moving from the Idle position to the first (Setup) "notch" of the dynamics.

In OR it is possible to move from one to the other without the need for any pause.

Would it be possible for OR to include this requirement or is that something that is inherent in each .ENG file for the respective loco?

Cheers!
Bruce

[lindsayts]

The pause is very likley there in real life. A great deal happens in Diesel Electric when Dynamaic brake is enabled.

Main Altenator output swiches off,
Fields of all traction motors switched into series mode and connected across output of main altenator. In some older loco's ths is down be a mechanical sequenced controler, Note the contacts used are large as they are switching circuits runnning at up 1500 volts at anything up 1500 amps.
At the same time traction motor armatures switched across the dynamic braking resistor grid.
Power for the Cooling fans switched to the traction motor armatures. ie power for the cooling fans comes from the dynmaic braking.
Main Altenator reenabled under the control of the dynamic brake controler.
On most loco's the control of the main altenator is delibratly slowed down to reduce the transient forces being applied to the traction equipment and couplers.

LIndsay

[muskokaandtahoe]

How long a pause?

[seagoon]

How long a pause?

From what I understand, Dave, approximately ten to fifteen seconds.

On the same subject, in OR there is no "neutral " (or idle) position when throttling up from dynamic operation to power operation.
When coming out of dynamic braking the controller goes straight to power setting 1.

Bruce

[seagoon]

In some older loco's ths is down be a mechanical sequenced controler, Note the contacts used are large as they are switching circuits runnning at up 1500 volts at anything up 1500 amps.
At the same time traction motor armatures switched across the dynamic braking resistor grid.

When I worked as an electrician in the elevator industry back in the early 1960s we had DC equipment operating under similar conditions.

The high-voltage relay-switches (actually referred to as "contactors") were made up of a carbon fixed contact and a copper moving contact, each about 2.5 inches in diameter and 3/8" thick.
If they drew an arc when opening it was quite spectacular!

Bruce

[csantucci]

The pause time is defined in line
DynamicBrakesDelayTimeBeforeEngaging ( 10 )
in .eng files.
It is a parameter (expressed in seconds) that MSTS uses correctly. As I don't use diesels with ORTS, I don't know if ORTS currently considers such parameter.

[Frisky57]

On the same subject, in OR there is no "neutral " (or idle) position when throttling up from dynamic operation to power operation.
When coming out of dynamic braking the controller goes straight to power setting 1.

Bruce

This is a bug that was fixed in r1380.

[seagoon]

This is a bug that was fixed in r1380.

I have the most recent release and it still happens.

[Frisky57]

I have the most recent release and it still happens.

If you're referring to the dynamic brake setup delay, then yes, the delay does not work in r1413. But skipping over idle when going from dynamic braking to power, that has been fixed.