Sarah Siddons Controls

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Sarah Siddons Controls Feb 26, 2008 13:55:46 GMT

Post by Deleted on Feb 26, 2008 13:55:46 GMT

Hi everyone,
I've nearly completed my Sarah Siddons Cabview for MSTS.

Can anyone help with the positon of the levers.
Does Met12 have Shunt, Series and Parallel or is it more like the Battery Loco controls being alot more variable.

How much movement does the air brake control have between release and full. I take it that it moves in an anti-clockwise direction as does the Westinghouse.
I think the digital speedo is in the box on the left hand side but what are the blue and red indicators for at the top of the box.

The vacuum gauge above is removed on Met12 but I've left it in incase we want to utilise a vacuum version of the loco.

Any help on any part of the controls will be very appreciated. Thanks.
Darren.

DrJimi

Virtual District Line construction engineer and arborist

Posts: 365

Sarah Siddons Controls Feb 27, 2008 23:38:23 GMT

Post by DrJimi on Feb 27, 2008 23:38:23 GMT

Darren,
WA Agnew Vol 2 p 405 notes they had 4 notches (actually 5 counting 'off'). These being:
0. Off
1. Shunt (Series connected)
2. Series (with accelerating relay allowing up to about 1/2 speed)
3. Parallel with resistance in circuit
4. Parallel with accelerating relay allowing up to full speed.

It further refrers to Vol 1 p 77 which describes the Metropolitan Vickers Type OA-3-B controller. It appears 'off' is at 3 o'clock (per your screenshot) and logically, looking at the limit stops, parallel is at 9 o'clock. The book does not, however, explicitly state the 'clock' of the other 3 notches. But looking at the photo of the controller's internals suggests they are equally spaced (i.e. 45 degrees per notch). I would bet TubePrune knows for sure.

Not sure on the brake handles, as I've only modeled a combo EP/Windyhouse thus far (38TS), but a Windy controller ought to have Charge/release, Hold and Apply at a guess (no idea as to positions and extent). I believe I know how to model the 'physics' of both brake systems, but we'll need the input from experts as to the control handle(s) operation and positions.

/Jimi

Post-traumatic déjà vu disorder: The feeling one gets after one has experienced trauma before it happens.

Deleted Deleted Member Posts: 0	Sarah Siddons Controls Feb 29, 2008 22:15:58 GMT Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by Deleted on Feb 29, 2008 22:15:58 GMT 47574.fotopic.net/c1308226.html check out the above fotopic site it may be of help to you theres one pic which pretty much covers the area you've modelled above, albeit from a slightly different angle

Deleted Deleted Member Posts: 0	Sarah Siddons Controls Mar 3, 2008 9:31:29 GMT Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by Deleted on Mar 3, 2008 9:31:29 GMT Thanks for the link shedcompnodosh. From those pics and all the others i assume Sarah is only drivable from one end as there is no speedo fitted to the end facing the stock and that's the reason they have a class 20 on the back aswell.

Post by Deleted on Feb 26, 2008 13:55:46 GMT

Post by DrJimi on Feb 27, 2008 23:38:23 GMT

Post by Deleted on Feb 29, 2008 22:15:58 GMT

Post by Deleted on Mar 3, 2008 9:31:29 GMT