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Member postings for tractionengine42

Here is a list of all the postings tractionengine42 has made in our forums. Click on a thread name to jump to the thread.

Thread: buying copper for boiler makeing
20/02/2012 16:27:26


When riveting for silver soldering should you stop short of completely closing the rivet in order to maintain a few thou gap the for silver solder to flow between the joining surfaces.

I understand it's important to maintain a few thou gap to get a sound joint?


Thread: New website editor
19/02/2012 22:56:46
Posted by Wolfie on 17/02/2012 23:04:13:

Use Notepad which is a text editor or download the free Notepad++

If you want to use text from ms word you can avoid problems by pasting it into notepad, then copy that and paste into your post.


Thread: Quorn Castings
19/02/2012 22:32:56
Posted by JasonB on 29/08/2011 18:59:52:
Martin Model in the US do castings if you are stuck

Hobby Mechanics in Australia also supply Quorn castings


Edited By tractionengine42 on 19/02/2012 22:45:13

Thread: UK Supplier of Imperial Acme Threaded Bar?
18/02/2012 13:24:46

Hi Paul

You could try here this company


Thread: Message to the Webmaster!
18/02/2012 12:45:42

Got it

Thanks Terry


18/02/2012 11:54:11

OK, (as mentioned by others) by going to the tools menu and adding this website to compatibility view under compatibility settings, everything seems to work.

test in compatibility view

But where do I find the embedded code fo rthis youtube video?

using explorer 9.0.5

But I don't think it's acceptable to expect users to have to change default settings just to be on this one forum. Not everyone is confident making changes to their settings.


Edited By tractionengine42 on 18/02/2012 11:56:05

Edited By tractionengine42 on 18/02/2012 11:57:23

18/02/2012 03:09:00

Wondering what all the fuss is about thought I do my own test.

Test 1. Failed

I typed some text, highlighted it and clicked the add link icon, Explorer went white and freezed up so I had to close the page.

Using windows 7 64 bit & explorer 9.0.5 (updated yesterday)

This is test 2 - text only.


(Apparently I can't spell my name)

Well test 2, text only works and can be edited.


Edited By tractionengine42 on 18/02/2012 03:09:43

Thread: Forum niggles
14/02/2012 18:47:15
I find it much better when links in posts are set to open in a new window
Most don't seem to do this.
Makes it a little easier to get back the ME post.
Thread: Rolls Royce engines going global in Singapore
03/02/2012 16:54:06
For the last 3 years I have been working in Singapore (needs must) so have some direct experience in this area.
The Singapore government wants to modernise and increase their manufacturing base by attracting high end foreign manufacturing companies; they also want to improve the skills of Singaporeans so more of these jobs go to local residents thus less dependent on foreign workers.
To this end the government is investing heavily providing very attractive training and startup grants.
Their economy is not dependent upon credit, is very stable and has fared as one of the best during the current recession; also they are well located for the growing Asian market.
With all the European economy problems and growing markets moving east I think you can expect to see more of this happening.
Thread: Drilling brass - seizing
02/02/2012 01:59:35
If you sharpen the drill with one flute slightly longer than the other the drill will cut slightly over size.
Not good practice but maybe will prevent jamming?
Just a thought.
Thread: Rep Rap
30/01/2012 16:40:34
Hi Robert
If it's 2 Dimensional then machining the image with cnc should not be a problem. If the image can be drawn in a 2d cad package a dxf file format can be saved which is ideal.
With the right software it's also possble to use images in Jpeg or pdf file format.
If for some reason your requirement is 3 dimensional, then the most convienient approach would be to model the part in a 3d cad package from which can be saved an stl file format.
Thread: think tank
27/01/2012 11:53:41
I am in agreement with Coalburner and Ady1.
Improving the forum search facility should be high priority, information is only useful if it can be found.
Thread: Magnetic bronze
27/01/2012 11:44:13
Copper alloys that contain iron, nickel, manganese or cobalt may be attracted to a magnet.

Could be Nickel Aluminium Bronze as suggested by Andrew or maybe a Copper Nickel alloy which often have some iron content.
Both should be OK to machine the Nickel Aluminium Bronze being the harder and tougher material

Edited By tractionengine42 on 27/01/2012 11:45:02

Thread: setting up new Axminister ZX30
25/01/2012 13:52:00
I use Superlube grease and spray which I find very good. It's available from
RS Components and others,
I agree with Martin, the copper based greases are meant for bolting, they provide controlled lubrication when tightening and assistance when breaking out bolted joints that have been in service some time.
Thread: Milling a semicircular groove, ball ended cutter, or?
23/01/2012 13:14:43
Repeated post by accident

Edited By tractionengine42 on 23/01/2012 13:15:56

23/01/2012 13:14:41
Cutting the thread last in this material may not be a good idea.
I had a job where 2 semi-circular threaded parts had to be opened out to a larger internal thread size.
When mounted in a fixture in the lathe I had two oposite gaps 4mm wide, the material was En24T and 1-1/4" 8UN thread.
The tip of the threaded insert chipped very quickly, I cut the thread to size, turned or replaced the insert to present a new cutting point, backed the tool off and took a few very light cuts to clean up the thread profile.
20 thread tips to do 60 sets.
Probably not such a problem in softer materials but in En24T my experiance indicates you wil go through a few inserts.
Regarding using ball nose cutters, I mentioned this because I thought you were a woodruf type due to concerns abut stress concentration. Although slower I thought it might be more economical on cutting tools.
I wonder why you need a locking pin, My MGB has those konck on/off wire wheel arrangements, the nut face is tapered and engages a corresponding taper in the wheel. Once knocked on with a soft hammer its tight. never come slackened off yet, From memory I think the tapers have a slightly spherical profile
I was once shown a wheel nut off a formula one racing car, unbelievably thin in section and extraemly light, this was the same locking arrangement, the nut having a male taper engaging a wheel female taper of what looked like 45 deg.

Edited By tractionengine42 on 23/01/2012 13:20:52

Edited By tractionengine42 on 23/01/2012 13:23:32

Thread: Girder crown stays - are they overstressed?
21/01/2012 20:06:17
Micheal William's interest in the Prince of Wales Fire box Girder Stays propted me to do some FEA on his behalf.
The results are as shown below. More results are shown in my album.
As can be seen the above is without girder stays.

and the above with girder stays.
These results show reduced stresses provided by the girder stays.
The analysis is done at a working pressure of 90 psi, material copper.
Even without the girder stays the design is quite robust IMHO, that's not to suggest they should be omitted.
I hope these results are helpful to those designing and building boilers.
Thread: Milling a semicircular groove, ball ended cutter, or?
20/01/2012 15:40:27
Hi Ian
If the nut is Aluminium and the bolt a much stronger En24 how much load/stress is the bolt going to see that would cause consern for the bolt?
I would consider using a carbide round nose endmill, the carbide will give a good cutter life. The end of the groove will have a spherical radius therefore no sharp corners. I would not think this approach will give concern regarding stress concentration. The thread root will be much more of a stress raiser.
Not knowing application I hope this helps

Edited By tractionengine42 on 20/01/2012 15:56:22

Thread: Snifting valve
20/01/2012 15:22:23
Hi Dave
I had been wondering about the workings of the snifter valve, now I understand.
Thanks for you help.
18/01/2012 16:30:54
Hi David, Thanks for that info.
My Allchins TE that I am building does not have a snifter valve so a couple more questions come to mind.
1. Is a snifter valve used when cylinders have either piston valves or slide valves, or only when piston valves are used. (I am thinking a slide valve can lift to clear a vaccum)?
2. Is the snifter valve only applied when superheating is used for the express purpose of using the vaccum created to cool and protect the super heaters, so if super heaters are not used a snifter valve is not used? (Then any vaccum would be used to brake the engine).
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