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Member postings for Laurence B

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

Thread: Pressure Gauges
28/02/2014 10:48:11

Hello John,

You could have a look at http://www.minipressuregauge.co.uk/ - they might be able to help.Click on "Pressure Gauges for Steam Driven Models"

Hello Julian,

Roy Amsbury did make some superb gauges,including a working 'Duplex' vacuum gauge.Amazing work!

Thread: Another open thought - beginners perceptions .
27/02/2014 16:40:07

There is plenty of published material about the use of lathes,milling machines and so on.Numerous books have been written over the years by,not necessarily 'experts' but those who have maybe worked in industry or have been model making for a long time.

Many years ago I served an engineering apprenticeship,so I should know how to use a lathe,miller,be able to silver solder etc by now!.I had to learn,and so do beginners.They just need to be patient and learn as much as they can.And,after all,we are all still learning!

Thread: Peter Rich Newport South Wales RIP
06/02/2014 10:58:27

Very sad to hear of Peter Rich's death.Though I didn't know Peter,I had always enjoyed reading his articles in Model Engineer:-the Dean locos build series and his occasional loco profiles,particularly the one entitled "Churchwards Rough Riders" I have a number of Peter's excellent drawings which cover most GW 2 cylinder locos in 5" gauge.I've only ever seen photos of the locos he built;the quality of his work was immediately evident.I believe Peter had been working on a number of 5"gauge GWR 'Saint' class loco models,which would have been a sight to behold.He also had a big involvement with the GWR Society 'Saint' project at Didcot,indeed I believe the idea was Peter Rich's originally.

Condolences to his family and friends.

Thread: 7 1/4 britannia
22/10/2013 11:41:02

Maybe this could be of interest?

http://www.horleyminiaturelocomotives.com/BR-Class-7-4-6-2-Britannia.html

The web site used to belong to Jim Vass who designed the loco.

Thread: Self adulation
18/10/2012 10:28:51
Posted by Andrew Johnston on 17/10/2012 16:58:20:

Dear oh dear, what a lot of curmudgeons.

Andrew

I think Andrew Johnson is quite right here,this isn't about the number of pages devoted to the subject,these complaints look like the politics of envy.

O.K., so Clive Cook and his son don't seem to be short of a bob or two.So what?Good luck to them.

The editor is right when he says youngsters need all the encouragement they can get,as it seems very few youngsters seem all that interested in the hobby.

And the editor relies on submissions made by model engineers.So maybe those complaining about this atricle should put pen to paper themselves-if they think they could do better!

Finally,I thought the article was very interesting.

Thread: 'Agnes' at Markham Grange
14/04/2012 22:31:51

Hi Wolfie,

I enjoyed the video,what a fantastic collection!

Diane is right about the naming of mill engines after the owner's wife or daughters.

Regarding a model,Peter Southworth of Chesterfield sold designs and castings etc,for a number of engines,including Corliss valve machines.

Sadly Mr Southworth passed away recently,but an aquaintance of his,I believe, has now taken over so the range so they should still be available.

http://www.southworthengines.com/

Thread: London Model Engineering Exhibition
19/02/2012 11:30:00

Yes,I read the editorial and think 'sour grapes' is about right.

Similar happened in 2009 when another event was being staged there.The car parks were full when I arrived having had a 2-1/2 hour drive (including battling through the traffic in Muswell Hill) to get there. Ended up parking in Wood Green (no courtesy coaches from there) and the older some of us model engineers become the steeper the climb of AP mountain becomes!

Mr EIM editor might as well have blamed the BBC for televising the snooker tournament as well as blaming this forum.

Thread: Miniature Duplex Gauge
04/02/2012 11:12:18
Hi Chris,
 
'My Hobby Store' sell a drawing for a duplex vacuum gauge that was designed and built by the late Roy Amsbury.
http://www.myhobbystore.co.uk/product/21107/m-67-duplex-vacuum-gauge
 
Also,Roy Amsbury wrote an article about constructing duplex gauges in the Model Engineer magazine: Vol 160 No.3825 20 May-2 June 1988.
Hope this is of help.
 
Laurence.
Thread: How do I
18/11/2011 10:50:26
A method that I read in M.E (where else!) and that I use,is to turn up a short bush the same diameter as the bar you wish to cross-drill,and with the same hole size through the bush.
Hold the bar you wish to cross drill in your machine vice (best if the vice is bolted/clamped to your drilling machine table) with the drilling bush set on top of the bar,along the bar where you wish to drill your hole.
The machine vice will hold the bush (being the same diameter as the bar) exactly on the centre line of the bar and will guide the drill accurately as you require.
As with the other methods you'd have to position the bush accurately along the length of the bar.Hope this helps.
Thread: Centec 2B renovation
06/11/2011 11:03:19
It sounds like something might have seized up somewhere.I've just been looking at the x-axis lead-screw on my machine.Unfortunately I don't have much information or many drawings on the 2B,so this might not be of much help,but this is what I thought.
 
In the gearbox,there are two nuts on the lead-screw drive gear.These is located in the gearbox chamber behind the 'pick-off' gears.Maybe if you undid those and also disconnected the lead-screw bearing housing at the other end of the table (i.e. the handle end) by removing the two allen screws.With the half nut disengaged,then the lead-screw might then come out.
 
Best of luck!
Thread: Off-line viewing?
03/11/2011 10:33:10
Hi Graeme,
There might be a way of downloading the information that you require from this website onto your computer.Perhaps those running this excellent website could enlighten us.
With the problems of internet security (or rather the lack of it) this might be a safer option than reading material on-line.But beware of what you do download.Hackers are becoming more and more sophisticated in their criminal intent!
Thread: Gauge 3 Dee
29/10/2011 10:55:55
Hi Eric.
Can't help you much with the first part of your query.Looking at the drawings,I wonder if the author has got his loco buffer beams mixed up with those for the tender.Beams cut from 0.750" x 0.125" would fit the tender,so my guess is that the dimension 0.844 could be right for the loco.Someone ought really to have checked this before publication. (I'll get me coat!).
 
As for water jet cutting,I have used Sciss Ltd in the past and been very happy with the results.There website is http://www.sciss.co.uk/
Good luck with the loco
Thread: Drawing Quality
23/10/2011 22:13:03
There was an interesting article in October's edition of Engineering in Miniature by a Mr Hawkins who has built some impressive 5" gauge locos (a King,2 Castles and a Star).
He was quite rightly,in my view, not too complimentary about the standards of model engineering drawings.They usually fall short of any drawing standards that I'm familiar with.And in some designs that I've worked to,individual components have only some of the dimensions added,the rest usually appearing on a mating part that appears on another drawing sheet!
It's no wonder errors creep into some model engineering drawings,that never seem to be corrected.All too often an unsatisfactory 'back of a fag packet' approach is deemed good enough for model engineers.
Anyone contemplating publishing any design in the model press should familiarise themselves with BS 8888 (or even the old BS 308 would do) or buy a copy of Tubal Cain's book on technical drawing.Fortunately there are just a few people writing in 'our' magazines who can draw properly.
Thread: How much ???
13/10/2011 10:35:28
As Tel says,this might be a difficult thing to do,and then we model engineers would probably moan even more when the actual costs came in above budget,allowing for inflation etc.
Model engineering,in my recollection has never exactly been a cheap hobby,and I think we should bear that in mind when thinking of embarking on some new project.
Thread: silver solder
19/09/2011 10:41:32
Posted by Mark Foster 1 on 19/09/2011 00:49:04:
what do you guys think of the Cad free solder . I have used it and find it poor to say the least ! it just doesent flow .The Quality of the joint worries me .I use this but hate it . My advice is to get the cad stuff while you can . I have been silver soldering in my trade for 30 plus years .I am finding this a backward step . I think it is a worry it makes the job so much harder
 
Hi Mark
I've just about used up all my Easyflo silver solder so recently I used some Silverflo rods,which I understand is the cadmium free alternative.I actually found this solder flowed very well with about the same heat input as for Easyflo,and found that the solder had penetrated the joints fully.
Granted,these were on some steel fabrications,which weren't overly big.
I've yet to find out how the new solder will work on brass or copper,or on fairly large fabrications;that might prove to be a different story!
Thread: milling
11/09/2011 11:30:51
Might I suggest having a look at what Arrand Engineering have in their catalogue.I have bought a number of indexable milling cutters and lathe tools (amongst other items) from them over the years.They are relatively expensive,but they do make quality tooling.
Generally I have found that HSS tools usually produce a slightly better finish than indexable tools,but the surface finish with indexable tools should be generally very good.
 
Thread: Silver soldering Stainless Steel
02/09/2011 11:02:06
I use Argobraze 56 silver solder (it is silver solder despite its name!) and some Easy-flo ''Stainless Steel Flux Powder' for silver soldering stainless steel.It's not cheap but the joint is fairly easy to make.I have used standard easy-flo rods to join stainless steel bits together but it's not so easy to use,nor is the standard flux quite aggressive enough.
As the others have mentioned,the use of brass on boilers is not to be recommended.
Thread: trevor shortland 51xx regulator
01/09/2011 16:12:40
Hi Nipper,
Have sent you a private message regarding the photos.
There was a photo of a working model 51xx in M.E. a while ago built by someone referred to as 'Ivor the Engine' (presumably from one of the Welsh clubs! ) Would be interesting to know if he modified the regulator.
Have sent you a private message regarding the photos.
Laurence.
30/08/2011 16:57:48
Hi Nipper,
Yes,I see what you mean about the leverage on the slider.There isn't much surface area for the steam pressure to act upon and keep it in place.Your idea for retaining bars on the main valve bars sounds a good idea,but as you say,there isn't a lot of room in the regulator housing!
Good to hear that you have your loco up and running.Would be nice to see a photo or two of your engine if possible.
Thread: 5" City of Truro Drawings
27/08/2011 10:16:41
Try 'Practical Scale' at Polly Model Engineering.I might be wrong but I think that Peter Rich may have produced a design for this class in 5" gauge,and Peter Rich's drawings are now available through Polly Model Engineering.Perhaps best to email them to see what they have.
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