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Member postings for Bob Worsley

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

Thread: Workshop warming
29/04/2022 10:34:16

I find the best heaters are the halogen type, warm you up. Alternative is to use the halogen work lights to illuminate.

But insulation is the answer, do some calculations on wall and ceiling area, U values etc and get an idea of what the heat loss is at a 20 degree inside/outside difference. The Kingspan/Celotex foam insulation is the best stuff obtainable, 0.02 W m^2 m C.

As has been said, no pockets in shrouds, spend it until gone then go for a handout from the council, just like everyone else.

Thread: Need advice on clearing Dads shed
28/04/2022 12:37:50

Wasn't there someone asking for a clearance to start up a home workshop in the last few months?

Possibly homeworkshop.

Also lathes web site, worth £35 to see if it will go for £xxxx?

Thread: Sigh, practicing a skill I would rather not need
17/04/2022 21:10:24

Is it just me or do the flutes look more than a little uneven?

Thread: Fitting a 5 micron DRO to Myford ML7
11/04/2022 17:43:43

Don't forget that the measuring beams, spars, whatever, are an analogue to digital device, with either light or magnetic bars and spaces doing the measuring. As such, there is always a +/-1 count error in this analogue to digital conversion. So, if the spar has 5 micron lines and spaces then there will be an additional +/-5 micron error. Of course if the spar has a =/-2 micron spacing then this conversion error will be 2 microns and mostly hidden in the conversion to a 5 micron readout. There might also be hysteresis error from moving one way then the other, this could be far more than 5 microns. Spars I have seen have some pretty stiff rubber seals, and the drag from them could be any ones guess.

As usual, do repeated, 20 or so, measurements and machining using something that will resolve to 1 micron, not accurate, but will resolve as a precision reading. A fiducial micrometer is the thing, not a digital micrometer where you have the same conversion error, analogue wins here. The difference between accuracy and precision, also repeatability and resolution. Easiest to machine a diameter on a lathe, from one direction, then the opposite. Measure up, bit of statistics and you have your answer. Read Right First Time by Price.

Thread: MEW, ME, RCM&E and Model Boats under new ownership.
08/04/2022 10:04:48

Why?

A small advert is just as effective as a full page one, tht you see every issue and never read. If they are all the same then it will be accepted.

As LBSC realised, there are beginners, real beginners, out there and they need text, if you don't know what a screwed thrupple on the Boying valve gear is then a photo is useless. As always, if you don't know enough to ask a question then the old LBSC way works. Martin Evans did a series on beginners back in the 80's I think, and I didn't understand him. Look at the Model Steam Locomotive Construction book and see if you understand it, then ask someone in the teens or twenties who has had 15 years of education. The magazine is aiming at people over 50 in the most case, kids gone, got money, never held a file in their hand before.

I think that an ideal first project would be a Weir steam pump, LBSC has described several. It is small, cheap, looks good when working, won't take 5 years to build, will run from air and also a boiler comprising a 1/4" pipe with water in it and a gas lighter.

As for drawings, someone struggling with opening AutoCad - the professional choice? - on a different computer, sheet of paper works.

07/04/2022 17:31:00

Remember the past. The New Model Engineer in the mid-50's, lasted less than a year? If it hadn't been for Edgar Westbury and LBSC then ME would have closed before the war.

Is CAD such a wonderful thing? Look at the drawings in the 50's and 60's. then at the start of CAD in the late 80's. Rubbish. Multi colour, lines so thick you needed the drawing to be five times the real size otherwise it all merged into a mess. It was a good way of filling a page for which there wasn't anything else to say, shortage of space, pah.

Going outside your area of competence. Thinking here of the influx of electronics in the 80's, by people who didn't know what they were doing. Look at Martin Cleeve, pillar tool chap, Tubal Cain, Jeynes corner etc for quality. Then these circuits where they couldn't do a circuit diagram, had lines joining at a crossover. Couldn't design, how many speed controllers without any pull down resistors on the transistor bases?

I would suggest that the way forward is to have constructional or instructional articles. Looking back over decades there is no value whatever in reviews of exhibitions, open days and similar. Also reduce the size of the magazine back to the early 60's, less waffle, also less 'continued on page 99'. Also reduce the adverts to only 1/8 page each, if you want more then hopefully there will be boring things like contact details, missing in many cases, where is an 07... mobile phone number? This will reduce the cost of the magazine to print and post, keeping the minimum print run to a lower number. On line archiving simply won't work, and not been here long enough to prove it, paper works. Merge ME with EIM, EIM had some good articles but rather short of pages per issue so a series went on for years. Go back to the 40's with LBSC and look at his articles.

There is the Boat Anchor Archive for electronics, want a similar one for drawings, mostly just scans from decades past, but could be paid for.

No doubt it all wants a huge shake up, another LBSC, got a lot of time for him after reading 30 years of his writings.

05/04/2022 15:22:25

Been reading lots of ME's from the 1930's onward. And they are still relevant and useful, the 2.1/2" King in 1932, which the drawings for can be bought from Percival Marshall. Who? This is the problem of CNC and 3D printing etc that in a few years they will be irrelevant due to software changes etc, look at your computer!

I might be in a minority of one but I have no interest at all in computer machining at home, I want to be able to make the item now and in 20 years.

As for people writing, ha, I posted a missive on boilers, only just out of hospital for burns after the flaming I got. I certainly won't bother trying again!

Thread: Why aren't carbide chop saws used?
31/03/2022 10:19:44

I have an Evolution 255mm carbide cut off saw, they do several so the blade size might be important.

Astonishing! The first thing I had to cut was 20x50 steel, whilst not like wood it was very close. I have cut many things with it, steel and aluminium.

What it won't like is flaky rust. Had to top and tail dozens of square section steel tube, about 40mm by 3mm thickness. Blade was blunt after a few, a new blade only lasted about 10 pieces. It seems to be like the problem of oxy acetylene cutting of rusty steel, it is impervious to the flame and won't cut at all. A film of rust as on storage surface marking is ok, but definitely not anything that looks flaky.

The other thing is the life time and cost of the blade, above comments but I have got through about 6 in 20 years, but compared with a hacksaw it is no competition.

I also have a slow speed saw with the 80 tooth 10" blade. Brilliant, but gearbox failed, bought another secondhand and as AJ mentions, this one chatters, can't find out why.

The real problem I find with these saws is the vice, will they securely hold a short length of metal. Had a big hacksaw but unless the metal was 10" long it wouldn't grip, and even then it was forever slipping. Not certain angle adjustment jaws are really worth the pain.

Thread: Anybody else remember Chuck the Muddle engineer?
21/02/2022 09:58:24

Just reading lots of old ME's, and my feelings are with a significant number if you replace 'wife' with 'slave' then they aren't at all funny. It was the era when women didn't count, anything they did was of no consequence, penicillin, WW2 Bletchley, Rosie the Riveter etc etc. I really didn't like many of them at all. I don't find anything at all amusing in ruining someones work, washing, so you can play with a loco. LBSC was never like that. In 1965/66 there was some discussion about Chuck returning, and many letters, even then, had my thoughts. Is that when he disappeared for good?

His books and articles, fine, good useful information.

As for critical comments on exhibition models, I have noticed that, and this is why I would never put a model in any exhibition. Worst offenders seemed to be Maskelyne, Hughes, Austen-Walten, though thier articles were always worth reading. What happened to Twin Sisters loco?

Thread: TED JOLLIFFE
14/02/2022 18:43:08

All through the 90's I exhibited at the model shows, and the arrival of Ted, with Harold Hall, Greg Sheppard and Mike Chrisp always resulted in a nice chat.

Added to the work he did on the magazine.

I will remember him, all of them, plus Barry Jordan and Roy Darlington.

Thanks chaps.

Thread: Steel tyres on alloy rims
28/01/2022 09:44:07

I would have thought that using iron rivets into aluminium rims is the problem due to impact damage? Need a softer metal, copper or aluminium?

Bare copper and aluminium together isn't a good idea, just look at copper tags on aluminium chassis with a bit of damp, total disintegration, why tags are always tinned.

Thread: Stainless steel boilers
28/01/2022 09:38:56

I am reading my way through 80 years of ME, and there are odd comments about not using stainless. From memory it is to do with corrosion, as pointed out chloride, but also I think from sulpher. Industrial boilers don't tend to use coal firing so the sulpher problem never arises.

Bit like the comments about silphos decades ago to an absolute no no now.

The fail safe designs using copper and silver solder really do seem to be a very cheap and easy solution.

Thread: Workshop disposal
29/11/2021 10:02:47

Another possibility is a local auction site. They will clear it, catalogue it, auction it, no hassle.

Just been to one where a chap died and a house full of his collection, mostly old test equipment, was sold at prices that amazed me. There was everything there, scopes, counters components etc etc, about 700 lots worth. At a 15% commission must have done well.

This was an industrial auctioneer, so used to this type of equipment, not certain the small town one would be anywhere near as good. Look at their previous sales, the catalogues, and what the lots got to judge.

You don't say where you are, as is normal, so nothing local to me will be of interest.

Thread: Urgent - opinions of lathe I am going to view/buy
13/09/2021 19:27:24

Well, how much did you pay for it?

Thread: Multimeter recommendations
12/09/2021 18:36:08

Perhaps the clamp ammeter is the way to go? No high current clearing needed, just the ability to withstand 1000V on an uninsulated wire.

Thread: Fowler Z7S Steel Boiler
12/09/2021 18:28:05

Use copper?

Copper is at a historic high price, £6,500 tonne, so will be expensive, but will also last much longer than a steel boiler IF you only use it a few times per year. Yes, there are lots of articles in ME about how to lay up a steel boiler, but it only takes one bubble in one corner to start the rust.

Up to you of course, but for such an expensive engine saving £2k on the boiler seems silly. Talk to Station Road Steam and the other model buyers if they would buy the engine with a steel boiler.

I think copper is wonderful stuff after reading up about its strengths and weaknesses.

Thread: Searching for magazine collectors
07/09/2021 16:40:57

Where abouts are you? I am trying to build up a collection and your early ones would be of interest.

TEE Publishing might be interested.

Thread: Disposal of swarf
07/09/2021 16:31:13

Seems to me that this is waste from a normal domestic household. Some have hobbies of cooking, or woodwork, or tapestry, dog and other animal waste or anything else. So the black bin takes it all, discrimination otherwise. Of course if you have 50kg then take it to the scrappy.

Our council produced a list of the only items to go in a black bin. Didn't include animal waste, sanitary products, even and old sticking plaster. These people are real dummies, how do they dispose of some paper towels covered in little Johny's sick?

Thread: Multimeter recommendations
07/09/2021 16:25:23

Buy a cheap, £3-5, one so it can bounce on the floor, do not bother with a Fluke or similar.

If you want a fixed meter, on a shelf or something in the garage, then get an LED display, LCD tend to be unreadable without being able to move it around to get the reflection just so.

Don't need more than 3.1/2 digits at which point they all use the same chip inside.

Thread: Urgent - opinions of lathe I am going to view/buy
03/09/2021 10:25:08

Imagine seeing this lathe at an auction. You can look, but not try it. Wind the screws in and out, rotate the spindle, look at the motor. But basically you will not see any hidden faults. Now consider what this lathe is like compared to a dog in an auction sale room.

I was trying to suggest things to do to establish its condition, no one has helped by saying that you can indeed look at the motor and drive, does the top of the headstock open to look at the spindle? I don't know. The things you really need to know are the state of the bed, damaged or cracked, the spindle, does it rotate easily, the carriage, does it move smoothy.

Don't forget that if the seller is an arts graduate then their knowledge of lathes will be negative, don't expect to have your questions understood, let alone answered. Go to look with a pile of cash in your pocket and a means to bring it home, found that riffling a wodge of notes does tend to change people's minds. On the other hand I have also found that screwing the price down also is foolish, you get an irritated seller. But your primary job is to establish a value to YOU, not others on the forum who last bought a machine years ago. I buy stuff on sales, usually auctions, and NOT ebay, on a regular basis. I have found that the good and the bad do even out, but that also requires you to buy on a regular basis. It is an easy price improvement to simply clean the thing. Also have other chucks so you can swap them around etc etc.

A three hour drive is just the investment you have to make to buy a machine, or anything in fact, enjoy it!

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