Wheel slip at the start of scenarios with steam locos

[Alicatt]

Still having problems with steam locos wheel slipping at the very start of scenarios, just downloaded the Settle Specials and the King class is even worse than the A4 at slipping when you are stopped at the start of a quick drive scenario, summer dry and daytime settings, train brakes at 70%+ reverser at 0% regulator at 0%.

First noticed this on the WCML starting at Carlisle and going north with an A4, and now that I have downloaded the Settle Specials add on locos the King does this as well, in fact the King does this just about everywhere using it's default consist of 10 coaches.

Is this normal, or is there something I'm missing?

[markpullinger]

Hi, try reducing the brakes as it is the wheels sliding as the buffers push the vehicles apart.

[deltic009]

Can't say I've noticed this phenomenon, do you mean purely at the scneario or drive startup, or do you mean at any point starting the train from zero mph?

You can't just whack open a steam regulator, I normally start off with around 20%, let the loco bed in and increase from there when the whole train (including all coupling slack) has been taken up. Then start to build the regulator and use sand where necessary to get you up to speed. Last night I drove Tornado out of Glasgow Queen Street on 10 up the 1in50 and didn't suffer a single slip on my way to around 28mph over the top at Cowlairs.

[Alicatt]

Hi, try reducing the brakes as it is the wheels sliding as the buffers push the vehicles apart.

Thanks, that stopped it.

On the King there is a leaver for "Large Steam Ejector" what is it and what does it do? I had to release that as well as releasing the brakes before the wheel slip stopped. I guess it has something to do with the brakes as you have to release it before you can move away properly.

[Alicatt]

Can't say I've noticed this phenomenon, do you mean purely at the scneario or drive startup, or do you mean at any point starting the train from zero mph?

You can't just whack open a steam regulator, I normally start off with around 20%, let the loco bed in and increase from there when the whole train (including all coupling slack) has been taken up. Then start to build the regulator and use sand where necessary to get you up to speed. Last night I drove Tornado out of Glasgow Queen Street on 10 up the 1in50 and didn't suffer a single slip on my way to around 28mph over the top at Cowlairs.

I meant purely at the start of a scenario not starting to move away from the halt. Carlisle on the WCML-N is where the A4 does this, not noticed it elsewhere with this engine, the King however I notice it just about everywhere. Like my reply above releasing the brakes fully stopped it happening.

Yes the Tornado is nice to drive, it maintains a good speed and keeps the pressure up without too much trouble, tho you do have to keep stoking her. I have managed to run out of steam with a 7f out of Waverley heading for Dalgety Bay with some mixed freight

[peterfhayes]

Alicatt
The large ejector ( modelled quite well on the Jinty) is for releasing the brakes when stationary.
I also tend to use the sander when starting off particularly in the wet or on an incline.

From: http://www.railway-technical.com/st-glos.shtml#E

EJECTOR
A steam operated device for creating a vacuum on trains equipped with the vacuum brake. Normally there are two ejectors, a 'large ejector' and a 'small ejector'. The latter is usually left on while the train is running in order to continuously evacuate the brake pipe at a low rate to overcome small leaks in the pipework. The large ejector creates a rapid evacuation of the brake pipe to effect a brake release. It is closed off once the brakes are released

Have a look at my steam driving guides on Marleyman's website (registration required) http://www.railworks.marleyman.co.uk/st ... 11396beb69
Regards
pH

[Alicatt]

Have a look at my steam driving guides on Marleyman's website (registration required) http://www.railworks.marleyman.co.uk/st ... 11396beb69
Regards
pH

Thanks,
I have recently registered there and have been reading your guide from there and been trying to put it into practice.