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Member postings for DMB

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

Thread: Cleaning up castings
18/01/2012 11:41:41
Nitric acid probably works very well on sandy castings since sand be used as the basis for glass making and I believe that Nitric attacks glass. So what do you store it in? Also how would you dispose of it? Pouring down the drain is NOT the solution! Very nasty stuff.
Thread: Milling a curved end
18/01/2012 11:34:32
Thats it, Bayzle. Just flick thro` each vol., use old envelope for a bookmark on useful articles. Later, copy these items on your printer or simply scan them into `puter. Easy way to create your own encyclopaedic `how to do it` manual. Why mess about with donkeys years worth of indexes to trawl thro` umpteen times every time that you want to know something. Thats what I have done, right from 1930`s. Sounds a lot but apart from LBSC theres not a lot else, since some good ideas from way back have been superceded by more recnt better ideas. I would say that 1950 onwards with each decade revealing better ways of `how to do it`. One example; instead of punching a piece of flexible steel tape with loads of holes and stringing it around a wooden disk to create a new set of dividing holes, its now only necessary to print out required number of divs. on a circular bit of paper + stick it to any old disc and use a pointer.Job done!
John
Thread: Snifting valve
18/01/2012 11:15:11
David and Nick,
Hope you dont mind the following comment but I think that if any beginner is reading your posts, they may be a bit mis-lead. On full size, the snifter was connected on the regulator/wet header side of the steam circuit so that cooling air would be drawn through the superheater elements to stop them burning out with the heat of the fire. I suggest that "best practice" would be to follow suit, especially if radiant type were used and even non-radiant if made of copper since copper tends to burn out quickly anyway. There is also the need to prevent ash being sucked down the blast pipe in to the cylinders to cause wear.
John.
Thread: ME Shows
16/01/2012 20:31:49
Hi Bazyle,
I have seen a large, single axle trailor used by a ME trader, that was filled with vertical dividers (plastic drainpipe?) to hold bars of metal stock. No packing, just hinge down the backboard/lid + go!
All beers under 5% = "maidswater"! Just fancy flavoured drinks.
John.
Thread: Application of water-slide transfers
16/01/2012 20:14:49
Hi Wolfie,
I have only recently read somewhere that there is a website holding a very large number of old drivers for the likes of ageing printers, etc. I think it was in Computeractive mag. I`ll see if I can find it and post details - it could help someone.
As regards incompatible plugs/ports, go to Maplins + tell `em your problem - they`ll come up with something.
Regards,
John.
Thread: ME Shows
16/01/2012 00:45:53
I could use my "old codgers" bus ticket for a 20 min. free ride into centre of Brighton to see Modelworld Exhibition in Feb. Hows that for on your doorstep. I probably wont go again this year even though my club, Worthing Model Engineers will have a stand. Reason is that its quite expensive to get in for what I see as essentially a "pins & glue" model xbn. (Table-top railways/trams/knitting/sewing and god knows what.) One of the model railway clubs once actually told me I belong to those "Dirty Metal bashers" in Worthing!!
I will of course, attend Worthing Club`s own xbn. in April this year. This will be a purely engineering xbn. Happy dirty metal bashing!
Thread: Metal thefts
16/01/2012 00:17:52
Defense company - Qinetque has developed a hi-tec system to prevent oil pipe damage/theft of railway signal cable and lots more apps. It involves sending a laser beam down the cable and reflecting it back to a remote box of tricks that analyse vibrations in the beam and where those vibrations took place. It will mean that anyone walking along near the track or digging up cable, say in Darlington area will be detected by an operator in London who can then alert local railway police.
The second reading of a bill takes place next Friday, relating to contrlolling the scrap metal trade - registrations/recording ID of casual suppliers/stopping cash transactions.
All in the Sunday papers today!
Thread: Parting off Blades
10/01/2012 15:09:12
Hi Bob,
Try going back to the business that supplies this mill (Arc Euro??) and ask for advice, even if you did not buy new. If its A.E., speak to Ketan. If its Warco, speak to Roger Warren. I have purchased goods from both in the past and found both of them very pleasant to deal with.
Good luck. Regards,
John.
Thread: Is it just me
27/12/2011 23:22:40
`Ere, `Ere!
Thread: NEW MAGAZINE FOR MODEL ENGINEERS
27/12/2011 23:17:39
I hope that not too many mugs rush to buy yet another new me - type mag at he expense of ME/MEW, after all ,if sales dip too much they could, just could follow Myfords and we dont really want that, do we?
Dont laugh - I did a "what if?" on Myfords 5 years ago and started collecting all the Myford bits that I thought I might want in the future. I envisaged likliest scenario would be them going bust like we keep reading about the rest of engineering in UK. Ageing owners sell out to someone who cocks it all up and it still goes down the pan. Flogged off to someone who takes the whole outfit to the Far East and down-market.
I`ve got most Myford bits I wanted so I`m laughing.
Thread: Respirators
19/12/2011 08:51:01
Fumes from arc welding are dangerous - could cause cancer - presumably lung as a result of breating said fumes.
Tech. colleges teaching arc welding use an extractor hose in each welding booth.
Thread: Morse Taper Removal
15/12/2011 15:59:26
 
Hi all,
Please refer to the "Milling Chucks" thread, my posting of 8 Feb. This will give you my solution to freeing jammed MT2 tapers.
Thread: The Sandown Park Model Engineer Exhibtion 2011
13/12/2011 22:34:49
I really enjoyed the Exhibition. Very good. Miss Myfords. Think 1/2 of Worthing club must have been there on the Friday.
Stewart H, now you know why the M25 has been nick-named the world`s largest carpark!
David, can we please have some seats somewhere or perhaps small groups of seats in a number of locations for "The Wearies"?
Thread: MEW, would less be more?
02/12/2011 19:03:39
Billy,
I think that your last post on this thread about if you subscribe you have access to all of the MEWs ever published, is misleading. I have been a subscriber ever since 1st issue, but only to the "hard copy," NOT the digital form. I followed your instructions but it says digital subscribers only.
John.
Thread: Clarkson Stirling Single 3.5"
25/11/2011 00:29:47
Hi all,
You may be interested in a little book that I had many years ago, about full size loco wheels - it gave the numbber of spokes in wheels of many Brit. loco designs. Just Google Mike Sharmans Wheel Specifications.
John
Thread: metric taps
25/11/2011 00:17:40
Woops! forgot the time - my prev. post here should have read TD`s post of the 24th @ 0345.
25/11/2011 00:14:21
Re Terry D `s post today @ 0345. Could it be that back in 1955 and earlier, Metric threaded bolts were made from Imperial sized Hex. bar as this was probably all that was cheaply available but since industry has gone over to Metric, metric sized Hex. bar is now the el cheapo stuff to use, even for Imperial/USA threaded bolts?
For sometime now, it has been necessary to use Metric spanners on certain BA sized Hex. Hd. screws, as Metric Hex bar is all thats available.
 
 
Thread: Displacement lubricator
22/11/2011 16:13:07
The preserved "Dukedog" GWR 4-4-0 lives just up the road from me - @ the Bluebell Rly. That loco has the usual GWR displacement lube mechanically connected to the regulator. There is a huge condensing coil for it in the cab, tucked up under the roof.
We are talking here about 200lb + so big condenser. No doubt if you go to your nearest preserved railway that has a GWR loco, you will observe the same fittings.
There was at least one set of articles way back in Model Engineer on this subject - hazard a guess @ 1970`s??
Thread: Car Alternator as Traction motor?
18/11/2011 16:17:23
I was told sometime ago that Rolls-Royces have a combined alternator/starter motor system. This means that the device is permanently engaged with the engine, resulting in silent starting, eliminating the terrible screech when the Bendix mechanism operates for starting most other cars. Also, there is a `slave` battery in the boot.
Perhaps one of the wealthier forum members with such a machine, can confirm the above.
Thread: Steam Fairground Equipment
15/11/2011 12:50:11
Carters Fair is on TV this Thursday, 17th Nov. 2011. Look for "Fairground Attractions" @ 8pm, Channel 5.
They have a Savage centre engine working in their 3-abreast gallopers carousel, together with an organ. There are also the spectacular Steam Yachts, operated by an engine and large boiler sited betwwen the 2 "yachts."
They also have some vintage Diesel-engined fairground tractors.
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