Wanted: Plan for loco screw regulator

This topic has 13 replies, 7 voices, and was last updated 7 March 2017 at 08:13 by Greg H.

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5 March 2017 at 08:55 #287194
Greg H
Participant
@gregh
Hi,

I need to make a regulator for my 3 1/2" loco and have decided to do a screw regulator instead of the original disc regulator. I don't have a plan for one and was hoping someone might have a design for one that they wouldn't mind sharing.

The outer tube needs to be no bigger than 1/2". The hole in the bush at the backhead is 1/2". The loco has no dome and the steam inlet will be through a series of small holes in the outer tube.

An info on the best approach or where to get a plan from would be appreciated.

Thanks,

Greg

Edited By Greg H on 05/03/2017 08:56:22
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5 March 2017 at 08:55 #25119
Greg H
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@gregh
5 March 2017 at 21:45 #287315
Neil Wyatt
Moderator
@neilwyatt
>bump<
5 March 2017 at 21:59 #287316
neville rigg 2
Participant
@nevillerigg2
Hi Greg

Try the one in LBSC's Princess Marina construction book, it may give you some food for thought.

Regards Neville.
6 March 2017 at 07:40 #287354
Greg H
Participant
@gregh
Thanks for the suggestion Neville. Do you have a pic of the plan that you could put up ?

Greg
6 March 2017 at 09:00 #287372
Clive India
Participant
@cliveindia
Good choice Greg. You could scale down the screw regulator used in the Simplex.

Have drawing if interested.
6 March 2017 at 09:09 #287375
Greg H
Participant
@gregh
Thanks Clive a photo of the drawing would be nice thanks
6 March 2017 at 09:34 #287385
paul rushmer
Participant
@paulrushmer83015
Hi Greg

I have just looked in the Princess Marina book and that is a disc in tube. Robroy and William use the same regulator which has a 3/8 whit thread in a 5/8 tube would have to be scale down for your application. Hope this helps.

Paul
6 March 2017 at 10:01 #287387
Clive India
Participant
@cliveindia
Greg, have sent you a Message.
6 March 2017 at 11:00 #287399
Greg H
Participant
@gregh
Hi Clive, I don't have a message from you in my in box.
6 March 2017 at 16:28 #287480
Clive India
Participant
@cliveindia
Should be OK now. It's my age!
6 March 2017 at 17:28 #287489
Bob Brown 1
Participant
@bobbrown1
A bit like this ??? May need to adjust the sizes a little this is off a 3 1/2 firefly

Edited By Bob Brown 1 on 06/03/2017 17:32:11
6 March 2017 at 18:10 #287494
duncan webster 1
Participant
@duncanwebster1
Emma Victoria (recently serialised in ME) had screw down regulator with 1/2" tube
7 March 2017 at 08:13 #287533
Greg H
Participant
@gregh
Thanks Bob and Clive, you've given me exactly what I needed. With the exception of size and a dome inlet pipe the Simplex and Firefly reg designs are the same.

Hi Duncan, thanks for the info, but I don't have those ones, just a limited selection.

I'm all sorted now. Thanks everyone. Here's where my boiler is at. I'm currently making stays.

Greg
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