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Member postings for julian atkins

Here is a list of all the postings julian atkins has made in our forums. Click on a thread name to jump to the thread.

Thread: LBSC 3.5" "Maisie" - steam regulator valve assembly
03/06/2020 01:58:36

Yes, the regulator rod should slide out of the green bit on it's square.

You don't have to undo the red screws at this stage.The valve and linkage will drop down and be retrieved by the wire I specified you must add to stop these bits falling down into the boiler.

Don't remove your '1' and '2'. Don't disturb this assembly please!

Cheers,

Julian

02/06/2020 13:44:37

Hello Bogus,

If you only need to deal with slack in the linkage of the regulator valve to the square on the regulator rod, then I would leave the regulator body and the steam pipe and tubeplate flange well alone.

You can remove the regulator rod and valve and linkage by removing the regulator handle and the gland for the packing. The regulator rod cannot be withdrawn at this stage because of the collar fixed to it as shown in John's drawing. Therefore you need to remove the flange that screws into the backhead bush.

Be very careful here if the backhead bush is screwed into the backhead as per the drawing (and not additionally silver soldered. Even if this is caulked with 'soft solder' the soft solder can shear.

You can then withdraw the regulator rod but before you do so put some wire around the linkage to stop the regulator valve and linkage falling into the boiler.

The wire can then be used to drop the valve down and be lifted out with the linkage and arm attached.

Cheers,

Julian

Thread: Hydrostatic Lubricator
01/06/2020 21:18:31

Hello Ian,

Yes, the detail is missing from Don Young's 'Newport', as it is from all his designs except one...

You need to get the copies of LLAS where 'George' is described and the drawings provided.

Another useful source is Roy Amesbury's 'President' design in ME.

Ignore the Cottam/Evans design as per 'Torquay Manor' as this is pointlessly complicated and also has a jet in the sight glass that is far too big IMHO.

If you PM me I might be able to help out.

Cheers,

Julian

Thread: taper pins or roll pins
27/04/2020 22:20:53

Hello Peter,

Sorry for the delay in replying.

I personally would never use roll pins on the motion, and especially the crosshead to piston rod. Why? Because I've had to remove them for an overhaul, and with great difficulty - with the battering ram effect of piston rod betwixt crosshead distorting them.

A solid fixing is preferable, via a taper pin IMHO.

Cheers,

Julian

Thread: Don Ashton
18/04/2020 00:00:15

Thank you Nick for that information about the 'wayback machine' and Don Ashton's website.

Cheers,

Julian

17/04/2020 01:31:46

For those who would like to know how much Don Ashton helped us all please see

https://modeleng.proboards.com/thread/13547/vale-don-ashton

(I hope the above link works)

Cheers,

Julian

 

 

 

 

 

 

 

Edited By julian atkins on 17/04/2020 01:32:47

16/04/2020 02:25:07

Thank you Dave, and Hopper.

To be quite frank, I am surprised that more have not commented on Don Ashton's death. He did so much for our hobby, and was a beacon of light in the darkness of the understanding of miniature locomotive valve gears for the past 45 plus years, and was such a great friend to many of us.

Cheers,

Julian

15/04/2020 00:57:40

It is with much personal sadness that I have to report the death of Don Ashton of miniature loco valve gear fame, and much else besides.

Cheers,

Julian

Thread: Somerset and Dorset Railway Trust, Washford
11/03/2020 22:32:33
Posted by Steviegtr on 11/03/2020 22:13:2It would seem that both parties are not talking as they maybe should. In a situation like this both parties should both leave the box. Stand together & think outside the box. It is easy to become saturated with ones own agenda. Obviously both sides have an agenda. Surely in a modern age both parties should put away there dualing pistols & get together to find a solution.
 
 
 
 
What a load of ill-informed drivel and nonsense

 

Edited By julian atkins on 11/03/2020 22:32:58

11/03/2020 22:24:07

duplicate post

Edited By julian atkins on 11/03/2020 22:51:56

11/03/2020 22:24:05

Hi Brian,

I was deliberately trying to be objective on all this, but you have brought up Mark Smith's press statement, as a WSR PLC board member, that is inflammatory and subjective towards the Somerset and Dorset Railway Trust describing it as a 'cuckoo in the nest' etc.

Probably best to discuss this with me via a PM, rather than detract from the situation the SDRT currently finds itself over Washford and the WSR PLC board serving a 'Notice to Quit' with no warning whatsoever, and less than 2 years after it agreed to a new 50 year lease.

Lots of you must have visited Washford, and lots of you might have an affliation with the old S&D, and anything you might individually be able to do to assist the SDRT would be very much appreciated.

Cheers,

Julian

11/03/2020 21:50:29

Dear All,

The Somerset and Dorset Railway Trust, which has long been established at Washford station and yard on the West Somerset Railway for some 45 years, and have restored the station and signal box as an excellent museum and have a great facility in the old goods yard, have last month been served by the WSR PLC board with a 'Notice to Quit' of 12 months under s.25 Landlord and Tenant Act 1954. This is despite having been granted a new lease by the WSR PLC just under 2 years ago of a further 50 years.

Can I please ask any forum members who would like to support the SDRT to join up...

www.sdrt.org/Membership.Html

Cheers,

Julian

Thread: Recovering from disaster
20/02/2020 23:02:33

As I stated the other day, I am very pleased that Neil wasn't affected.

I have been very badly affected by 'Storm Dennis' here in South Wales, and have been unable to get buildings insurance for flood or river damage for the past 3 years. I have had to use a specialist company who will insure homes close to a river, but with exemptions for flood or river damage on the policy.

3 years ago my insurance company refused to provide further buildings insurance at all, simply due to a postcode check of the proximity of my home to the River Sirhowy, and my stating the house was within 30 metres of the river, despite no history of flooding whatsoever and the river, apart from last weekend, being 12 feet below the level of the back garden normally.

I used to live on the Isle of Wight where large parts of the Isle of Wight are not covered for subsidence in buildings insurance, if you can get it at all.

Cheers,

Julian

Thread: Allchin 1.5" Injector Options
29/01/2020 21:28:08

Hi Howard,

Suggest you contact Paviersteam, usual disclaimer, though currently the website omits the previous extensive list of Len Steel injectors to the Gordon Chiverton designs, so I don't quite know what has happened recently.

What is wrong with your father's original injector fitted?

I recall Bill Hughes stating he was going to describe the injector for 'Royal Chester', but I don't think he ever did. I thought I had a complete set of MEs for 'Royal Chester', but I might have missed an issue, as I am not that interested in miniature traction engines generally.

Cheers,

Julian

Thread: 3 1/2" gauge Caledonian Dunalastair III.
02/01/2020 23:55:02

Hello Michael,

I did have access to a full set of ME's, but don't any longer, but your example is no doubt based on the E L Pearce loco described in ME in 1901 in what was the first 'sort of' construction series of a miniature loco.

Phelps of Treherbert doesn't ring any bells with me, despite having a long association with South Wales.

Cheers,

Julian

Thread: Speedy1500
20/12/2019 20:44:06

Hello Mike,

You should take very careful note of Phil's (Weary) advice.

If you have been told that the LBSC designed valve gear is not worth improving, then those who gave you that advice don't know what they are talking about. KN Harris had a 'go' at redesigning the valve gear, as did Don Young for Reeves; neither solved the problems. Only Don Ashton's redesign gets it right. You can run all 4 on a computer valve gear simulator which will prove what I state.

On the fullsize loco the short combination lever has for the top two 'pins' a 'pin within a pin' to get the required proportions correct with no drop link. The 2 top pins are contained within the valve gear crosshead and guide.

LBSC used a pin below a pin for the 2 top pins, and therefore the combination lever proportions are incorrect.

He also dispensed with the valve crosshead and guide, which causes undue wear on the piston valves. LBSC 'Speedys' are notorious for piston valves that 'blow' after a bit of use, resulting in steam going straight up the exhaust with a 'woof 'woof' rather than a smart 'chuff' 'chuff'.

Roger Froud's example on the modeleng.proboards.com forum site as linked by Phil also has super duper piston valves for bronze cylinders, a redesigned smokebox draughting, and an improved boiler design, and much else besides, plus of course the Don Ashton designed valve gear.

It has the correct curves to the rear of the bunker, and the correct type of rear buffer beam - all defects with the LBSC drawings when compared to fullsize.

Cheers,

Julian

Thread: PGK's 1" Minnie
14/11/2019 22:49:02

Hi pgk,

The front foundation ring section is milled and filled to be a jolly good fit between throatplate and inner firebox tubeplate, also as you note fitting the side curves of the inner firebox tubeplate, having determined where the inner firebox wrapper will be, to which it will end up abutting. The step on the ends is milled. It isn't a big step, but enough to intersect with a step on the foundation ring sides and avoid that problematic butt joint plus avoid the foundation ring sides moving latter on.

I make the flange depth quite generous.

Cheers,

Julian

14/11/2019 21:42:47

Hi pgk,

Quite the contrary.

The front (and latter rear foundation) ring bits are milled and filed to fit the inner plates namely the inner firebox tubeplate, and inner firebox doorplate up to where the inner firebox wrapper starts and later ends. You dont have to have the inner firebox made up to do this for the front piece of the foundation ring, but you would have to hand the already flanged plates for the inner firebox to hand.

Obviously, to do this you need wider section copper first than the simple width of the water space.

Many boiler makers have problems doing the foundation ring sections, and to my mind anything that makes this easier and less fraught ought to be adopted.

I hope this makes sense. A simple sketch would probably make this a lot clearer.

Cheers,

Julian

14/11/2019 21:42:45

Hi pgk,

Quite the contrary.

The front (and latter rear foundation) ring bits are milled and filed to fit the inner plates namely the inner firebox tubeplate, and inner firebox doorplate up to where the inner firebox wrapper starts and later ends. You dont have to have the inner firebox made up to do this for the front piece of the foundation ring, but you would have to hand the already flanged plates for the inner firebox to hand.

Obviously, to do this you need wider section copper first than the simple width of the water space.

Many boiler makers have problems doing the foundation ring sections, and to my mind anything that makes this easier and less fraught ought to be adopted.

I hope this makes sense. A simple sketch would probably make this a lot clearer.

Cheers,

Julian

Thread: A1x Smokebox?
13/11/2019 14:46:33

Hello Philip,

Don Young's 'Newport' 7.25"g design has an A1X smokebox. Reeves could supply you with the relevant drawings.

Alternatively, all you need is a piece of tube 4.312" OD, 2.910" long. My front and rear rings are from stuff I had in stock, and I rolled the tube and silver soldered it.

The 'drumhead' smokebox sits on a saddle with an elegant profile. There is no casting available for this, so I fabricated one.

The smokebox door is 3.218" diameter.

Note that Martin Evans drew the A1 smokebox and door too small in diameter.

The following is from one of my albums on here.

Cheers,

Julian

dsc00836.jpg

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