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Member postings for Nick Clarke 3

Here is a list of all the postings Nick Clarke 3 has made in our forums. Click on a thread name to jump to the thread.

Thread: An electrostatic mystery ...
13/07/2019 07:36:44

When I first started teaching nearly 40 years ago we had more time and fewer 'safety recommendations' and two demonstrations were getting a group standing in plastic washing up bowls to hold hands and charging up the line with static electricity before asking the end pupil to touch a water tap and secondly to stand in a bowl oneself and light a Bunsen burner by sparking across to it. Lots of fun, but I suspect today the main objection would be to the expense of keeping 30 plastic washing up bowls for one experiment!

One of the most interesting manifestations of static discharge can still be seen if you still develop your own roll film. Loading a film into a developing spiral in a darkroom, when you get to the end where it is secured to the backing paper you need to tear it off. This usually produces a visible spark, but I have never seen it affect the film, surprisingly.

Thread: Aldi bargain laser level
11/07/2019 20:32:14
Posted by JC54 on 11/07/2019 20:25:34:

Last week picked up two pairs of work trousers reduced at Aldi. £2.99 a pair.... well worth looking at their reduced stock.. John

Sadly, after a lifetime of over indulgence, they do not keep them in my size ………. !

Thread: Wanted ... design for snifting valve suitable for large boilered Tich.
10/07/2019 14:56:04

There is a very brief mention of the snifting valve in the additional magazine articles that describe LBSC's own Tich where he describes an issue with the snifting valve on his own loco "There was a blow at the snifting valve that projects through the smokebox so I took it off and found a chip of metal in it." but no drawing of the snifiting valve itself or how to erect it.


Edited By Nick Clarke 3 on 10/07/2019 14:56:46

Thread: Norton anti virus
10/07/2019 07:40:53

The problem is that everyone who is satisfied with their AV choice can only recommend that choice from experience, however my two pennorth - I am satisfied with Sophos at work (paid) and the free version of AVG on several machines at home.

Thread: Curious
05/07/2019 17:50:15

Posted by SillyOldDuffer on 05/07/2019 17:47:55:

It's a sad state of affairs when even beer is too complicated to understand!


Actually the first is quite easy to understand, the second and third are a bit harder to figure out and after that ANYTHING is too complicated to understand

Thread: My new lathe a Warco 918
05/07/2019 17:46:38

Sorry typo - should read SC3

Thread: Hot water from the snifting valve,
05/07/2019 13:39:04
Posted by Clive Brown 1 on 05/07/2019 12:31:20:

Don't know the Coumbia design, but does the ashpan have any damper arrangement that might be stifling the fire?

Or perhaps the builder hasn't provided sufficient air hole area past the ashpan. Have you seen this loco in steam?

The discharge from the snifting valve may well be because it needs pressure to keep it closed. The regulator might be leaking slightly, as many do, allowing this leakage past the valve.


Terry -

Just had a look at the Columbia drawings and I have to agree with Clive's suggestions. The ashpan is very shallow indeed and the four holes in the front corners may not allow sufficient air through to the front of the fire. I addition the thermic syphon comes very close to the grate at the front of the firebox and as such may allow a hole to develop in the fire around there.

The snifting valve is pointing downwards at the bottom of a pipe from the hot header and without sufficient pressure in the system to hold it tight should leak steam if anything, but it could be water, even with the radiant superheaters the full length of the firebox.

As regards the regulator this appears to be the most complex I have ever seen drawn for a model locomotive - a twin poppet valve arrangement operated by cams. I would certainly be wanting to check that it sealed tight.

Thread: My new lathe a Warco 918
05/07/2019 13:10:28

Deeply envious Ron -

When I wanted to upgrade my lathe earlier this year the Chester version of the 920 was my first choice, but it was out of stock and no delivery date was set, it was really too big for my workshop and something else I use would have had to go (ditch the drill press and just use the miller for example) and the price premium over the SC2 I finally decided on, which is large enough for my present needs, finally tipped me towards that.



Thread: Phillips vs Pozidrive and portable drills
05/07/2019 13:04:59
Posted by Mike Poole on 05/07/2019 12:55:42:

As Kwil points out maybe not everyone is familiar with the expression ‘brum em in’. Brum is the city of Birmingham in the UK and a Brumaggem screwdriver is a hammer. The suggestion is that time is wasted using a screwdriver when a hammer will sink the screw, probably sharp practice from the days of piecework. Obviously a hammer will not be fussy about the head of the screw. These days with many screws being hard brumming them in could be quite dangerous and is not to be recommended.


As an adopted Brummie, living here for more than 30 years, I would like just like to point out that this reference to inserting screws is not correct - I am not fussy about anything and everything!

Thread: Microns ...
05/07/2019 12:53:59
Posted by David Colwill on 05/07/2019 09:28:20:

That all seems a bit agricultural to me.

I have just made a bolt for my 1 5000 scale engine that I am building on my 1902 Drummond lathe.

The bolt measures 57 nanometers in diameter and is accurate to 5 picons (can I call them that?)

I am happy to send it for inspection.



I am unable to vouch for that as when I got it out of the envelope David sent it to me in I dropped it onto the large box of 567BA machine screws I was slitting the heads of in the 3 jaw of my Drummond Roundbed lathe.

More seriously Drummonds proudly advertised that their Roundbed lathe beds were ground to a tolerance of 1/1000" so what does that suggest the tolerance of parts made on them would be in reality? 10x that??

Also John Stevenson in another forum a few years ago noted that the latest Myford connoisseur lathe bed was ground on the same surface grinder as his 40 year old one!

I'm with what John S wrote on this subject I'm afraid, silly tolerances are not necessary for our hobby - but as it IS a hobby, if you get pleasure from working to them, you are doing exactly what is right for you.


PS As someone diagnosed with autism late in life, if you say you have to work to them I can see where you are with that as well

Edited By Nick Clarke 3 on 05/07/2019 12:58:10

Thread: Hot water from the snifting valve,
04/07/2019 21:38:30

If it is fitted to the superheater water can come over if the is over full and the regulator is open (unlikely from what you have said) or from condensation - but in a modern high superheat boiler design makes this unlikely to be more than a few drops if there is a fire lit - steam is more likely than water.

You have puzzled me too. Can't offer any other suggestions, sorry, but when you do find a solution please come back here as I am now close to being as curious as you to find out the cause.

04/07/2019 20:56:01

Sorry - I only asked as you said it was blowing hard.

Fire - begin with wood or charcoal soaked in paraffin and then feed coal quite quickly. make certain the whole grate is covered and there are no holes in the fire.

Two areas to investigate - firstly if the gauge is reading zero it is either not making steam or the passage to a fully working gauge may be blocked and secondly is the fire burning brightly or not? If not check ashpan and grate.

If this is your first loco you could possibly do with someone else there to observe and advise as you light up - are you a member of a club?.

Edited By Nick Clarke 3 on 04/07/2019 20:57:05

Thread: My new lathe a Warco 918
04/07/2019 20:45:59

Posted by Hopper on 04/07/2019 11:09:01:

It's only 20 years old. Almost new.

My Drummond was already that old when I was born. And it spent WW2 making aircraft parts, so saw more than typical model engineer use.

That's lasting that is...


A callow youth I suspect! My Drummond.was 12 years old when my Dad was born - and I'm no spring chicken either - mind you at present it is under the bench awaiting the fitting of a replacement saddle that amazingly I found on *Bay.

Thread: Hot water from the snifting valve,
04/07/2019 20:38:06

steam blower or electric?

is the gauge OK?

What happens if you open the regulator?

where is the snifting valve connected to?

Thread: Rodney Milling Machine Accuracy.
30/06/2019 19:30:12
Posted by Nicholas Hill on 30/06/2019 14:33:12:

I also like the idea of joining a Model Engineering Club. I live in Beeston, in Notts, so I am sure something must be around me. It is the home of Myford after all....

Nottingham SMEE are in Ruddington and Erewash Valley are in Borrowash - both are quite close and there may be others.

Thread: The website needs an update
30/06/2019 19:20:01
Posted by old mart on 30/06/2019 19:18:48:

I'm so glad when someone else makes a mistake, it means I'm not alone.

I know I'm not alone - the voices tell me I'm not!

30/06/2019 19:13:51

I though I was bad, often not knowing what day of the week it is, but I can usually get within a month! laugh

Thread: Using a lathe
30/06/2019 19:10:57
Posted by Mick B1 on 30/06/2019 19:09:05:

Dunno if I can live with the guilt...


I call mine the wife ……………..

Edited By Nick Clarke 3 on 30/06/2019 19:31:23

Thread: Snail Problems
29/06/2019 13:12:26
Posted by Tony Pratt 1 on 29/06/2019 10:56:38:

I believe Metaldehyde slug pellets are to be banned in 2020?


I use a model steam engine - Mamod type - to demonstrate energy changes to children in school.

No longer allowed to use meths burners because they could overflow and spread liquid fire all over the place so we use Metaldehyde fuel tablets instead. What are we to use next??

Thread: Do you clean your workshop at the end of the day?
29/06/2019 13:01:24

Quote:- Quentin Crisp — ‘There is no need to do any housework at all. After the first four years the dirt doesn't get any worse.’

(but I am not being serious here smiley)

Edited By Nick Clarke 3 on 29/06/2019 13:02:07

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