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Member postings for FMES

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

Thread: How badly do I need a surface plate?
22/07/2019 15:22:28

I don't know what you would be doing surface table wise on a lathe, bus you definitely need some form of reference flat for taking measurements, using a height gauge for example.

I was lucky enough to obtain (not going to say 'pick up' a 3' x 2' cast iron table on its own stand - hadn't built the workshop at that time - just the concrete base, literally built everything else around it.

We put it in the middle and its stayed there ever since, no way I'm trying to move it, and I can get all around it for access.

FWIW, I have a cheapy Clarke CL300M for work that is too small for the bigger lathes, mostly small valves and pipe fittings certainly never needed to put it on a surface table.

Regards

Thread: Dangerous 2" Scale BB1 Boiler
22/07/2019 15:09:52
Posted by old mart on 22/07/2019 14:24:50:

The work hardening aspect is interesting. Copper work hardens by stretching, so how much smaller do you have to make the boiler for it to be the correct size after testing?

Never had a boiler fail to fit its intended purpose yet, then again if you build and test the boiler first, everything is machined to fit.

And you are only talikng a few 'thous' of growth if you test properly.

There is always a difference in sound after testing too - before the metal will sound dull if you gently tap it, afterwards it will 'ring'

Regards

21/07/2019 07:47:39

A newly constructed silver soldered boiler usually has the strength integrity of a piece of chocolate until it has been fully work hardened, normally by carrying out the hydraulic test in stages and slowly building up to the required pressure.

Pumping a new boiler up to working pressure in one hit will almost certainly cause deformation in all sorts of places.

Regards

Thread: A little rant about Emojis and their kin
18/07/2019 16:51:17

You got your money back if you pressed the right button - I think that was 'B'

Otherwise you pressed 'A' to connect your call

And Lord help you if you were on a 'Party Line'

Regards

Thread: The Chocolate Fireguard as designed by Mercedes Benz
17/07/2019 08:23:40

Posted by pgk pgk on 17/07/2019 06:45:12:

I've forced myself to stop ranting on now but on a lighter note I once wrote an article called 'mince up your granny and spray her on the meadow'. It wasn't popular.

pgk

Soylent Green?

17/07/2019 08:11:00

Lets be practical, in a few years the majority of us will not have personal transport as we have today.

For one thing, most of us couldn't afford to buy an all electric vehicle, andd wouldn't have any way of charging it easily if we could.

then of course there is always this **LINK**

Regards

Edited By FMES on 17/07/2019 08:14:41

Thread: Jet Washer Nozzle
06/07/2019 21:11:20

Tried here Vic?

Nilfisk Ltd
Nilfisk House
Bowerbank Way
Gilwilly Industrial Estate
Penrith, Cumbria
CA11 9BQ
Thread: Hot water from the snifting valve,
05/07/2019 19:38:47

Terry, I'm rather surprised that you have had this loco for getting on six years and not had any luck steaming it.

Anyhoo, lets get back to basics. its a big old lump even at 3.5" gauge and the boiler must hold a fair bit of water.

One of my locos holds about 7 litres and on a cold day 20- 30 minutes of firing doesn't always show pressure on the gauge even with a good fire going. As SOD says, it takes considerably more energy to convert hot water into steam rather than to get it to boiling point in the first place.

So as long as all of your tests have been completed properly - safety valve checks etc, then you need to wait quite a bit for the pressure gauge to start to rise even with a good fire going.

At the same time as you are heating the water a lot of expansion is taking place, and any water trapped after the regulator in the superheater for example will find the easiest way out - first easy option - the snifting valves, and this is a common release point on stream up.

Sounds to me that you may not be waiting long enough and dropped the fire before it had got going properly, there are plenty of ways to test boiler pressure indication even without a gauge - gauge blass blowdows, blower, whistle etc, so if none of these are working you get the idea that the boiler is hot but not steaming.

For mine, I normally keep everything shut off during the initial firing with just the electric blower in the funnel, dampers opened, fire door SHUT, - a common mistake that stops the draft being drawn through the grate.

I keep it like this until I see about 20 - 30 psi reading on the gauge before opening the boilers own blower, total time for the bigger engines can take 40 minutes to an hour to get to the point of the safetys lifting.

If you are totally unsure that the pressure gauge is working properly, with a empty boiler connect up some piping to a convenient port - blow down valve is good, and with the valve open feed up 10 - 20 psi of air into the system, this should make everything work (to a fashion, make sure the wheels are chocked first tho because an inadvertant regulator operation even at these pressures can cause everything to set off on its own.

Regards

Thread: Rover V8 drilling valve guides
13/06/2019 21:49:14

There is absolutely no need to drill out the guides on any of the BOP engines, they press out easily, with the correct tools, and likewise press back in with the correct tool to the correct depth.

Replacement guides are a couple of thou oversized from standard to allow for any wear caused by the removal operation and give a tight grip on refit.

I would suggest that as the ten bolt heads are fitted with bolts as standard, you consider the use of the stud kit from ARP No 157-4301 which will allow for a better grip onto the gaskets, which should be composites on these engines rather than the metal shim type.

Are you changing the cam? if so don't forget the rocker shaft shim kits for setting the follower pre load.

Regards

Thread: Drawing errors for LBSC Maisie
10/06/2019 11:30:26

Hi Bob, Not specifically answering your question, but a friend of mine built a 31/2" Maisie back in the 1980's, as I recall there were no problems with the running gear, but when I was building the boiler there as degree of difficulty in getting heat for the silver solder to the front of the combustion chamber without melting the vertical water tubes.

In the end we opted for the alternative non- combustion chamber boiler.

Can't think of anything else.

Regards

Thread: Aluminium cylinder blocks
09/06/2019 07:45:24

As traction is affected by weight I would be more tempted to balance the light back end with additional lead.

Just a thought

Regards

Thread: Tyrosemiophilia
07/06/2019 16:16:05

Barometers, from the early mercury column to the latest digital, and yes I do have an EPP licence.

Regards

Edited By FMES on 07/06/2019 16:17:23

Thread: Hi and GMT Question
04/06/2019 16:05:05

Having seen Edwards Burrell in the flesh you are going to need some fairly large machinery to complete it.

Regards

Thread: Antikythera mechanism
03/06/2019 21:41:54
Posted by Alan Johnson 7 on 03/06/2019 18:42:38:

I had the chance to see the Antikythera Mechanism today at the National Archaeological Museum in Athens. Truly amazing, especially considering the size, and it was not in one piece - in such a large wreck - and had been under water for 2,000 years!

Also amazing is the genius of those who worked out what it was, and made replicas!

By some chance has there been a construction article in Model Engineer?

Alan.

I must have been there a couple of days before you alan, took a couple of photos

thumbnail.jpgthumbnail2.jpg

Thread: Cast iron dust , is it really that bad for lathe beds.
03/06/2019 06:17:30

Cast Iron swarf is a total pain, if left on a machine that has had a water based coolant in use the swarf will fuse together and form a solid lump.

I speak through experience of having two Brigeport R8s written off because the apprentices didn't vacuum out the slideways properly on the knees.

If it gets down into the suds tank you have to chip it out with a chisel / screwdriver. and it bungs up the pump.

Regards

Thread: What is the correct way to use a split die to cut a thread.
03/06/2019 06:03:58

Agree with Bri, and only add to ensure that the writing on the die faces the work.

Regards

Thread: Does Not Compute
02/06/2019 10:29:09

Sorry, I'm confused (as usual).

Just logged in to the secure santander website and I see this message on the log in page:

Received a suspicious email?

If you get an email that's branded Santander but doesn't contain your name, do not reply, open any attachment or click on any link. Forward the email to [email protected] for us to investigate.

The correct contact number is quoted

What am I missing?

 

Edited By FMES on 02/06/2019 10:29:40

Thread: What do YOU call it?
22/05/2019 18:47:37

Heaven

Thread: Stuart boiler feed pump
19/05/2019 19:16:17
Posted by Maurice on 13/03/2019 17:47:15:

I made one of these a long time ago. At the time there several people warning that they had one and it would run very fast then stop. I had the same experience, and found that it was only happening on steam, not air. Hydraulic lock! I found that the steam piston covered the drain cock holes before the stroke was complete. I cut small half round grooves from the mouths of the bore to the drain cock holes. Turned on steam with the drains wide open. Steam came from one; closed it till the piston moved to the other end; slowly closed the second drain. off it went. After it had warmed through for a minute or so, I fully closed the drains and I "ran like a watch". Still does. Once it's hot it can be slowed right down with no problem. I did tell Stuarts about it at the time. I should be most interested to know if they ever changed the drawing?

Regards Maurice

Maurice,

I would just like to say thank you for resolving the same problem I had with My pump.

Regards

Thread: Ever have one of those days..?
15/05/2019 10:24:21

Sounds like a duvet day before you do yourself an more damage smiley

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