5″g Waverley Brake Valve

[James Stanton 2Participant @jamesstanton2]

Hello,

I am after plans for Martin Evans 5"g Waverley Brake Valve or similar. I have the full set of drawings however this appears to be omitted. Is there someone who can please point me in the right direction. Cheers

James

[James Stanton 2Participant @jamesstanton2]

[Ady1Participant @ady1]

Is this what your after?

It's in 3779

[James Stanton 2Participant @jamesstanton2]

Hi, I am after the brake valve itself, not the brake cylinder. I have since heard that it can be found on the Springbok drawings.

Does anyone have that by any chance?

Edited By James Stanton 2 on 10/10/2014 09:17:33

[Ady1Participant @ady1]

Is that it? From 3090

[James Stanton 2Participant @jamesstanton2]

Brilliant. Thank you very much Ady!

Edited By James Stanton 2 on 10/10/2014 09:41:39

[Ady1Participant @ady1]

Which bit do you want? I'll just blow it up and put in in here

Is it the bottom right drawing?

[James Stanton 2Participant @jamesstanton2]

Hi Ady Can you do just the Brake Valve please. cheers

[James Stanton 2Participant @jamesstanton2]

Posted by Ady1 on 10/10/2014 09:43:17:

Which bit do you want? I'll just blow it up and put in in here

Is it the bottom right drawing?

Yes it is. Thank you very much.

[Ady1Participant @ady1]

From ME issue 3090

Edited By Ady1 on 10/10/2014 10:02:53

[James Stanton 2Participant @jamesstanton2]

Fantastic. Thank you very much indeed!

[Boiler BriParticipant @boilerbri]

My 5" brittania has a non functional manual brake system which I would like to change to steam operated. Will one of the above cylinders be strong enough to operate the brakes if I make one and fit it?

Brian

[julian atkinsParticipant @julianatkins58923]

Hi James,

There is a lot to be said for altering the standard Martin Evans brake valve so that the spring is contained within the interior of the valve rather than on the external front. This allows a large diameter spring and reproduces a better scale external finish.

I would also silver solder the valve disc to the spindle. 10BA for the fixing screws is quite OK, and you can easily reduce the overall size to much smaller. If the back is elongated/extended to incorporate an internal spring, you have enough width to add a steam feed to the back and so avoid one port slot on the valve disc.

There really ought to be a release function on the valve notwithstanding Martin Evans' spring loaded valve on the steam brake cylinder which I set at 10 psi.

Anyway that is how I have always done mine.

Cheers,

Julian

Edited By julian atkins on 09/08/2016 23:04:39

Edited By julian atkins on 09/08/2016 23:05:48

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