By continuing to use this site, you agree to our use of cookies. Find out more

Member postings for Bob Youldon

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

Thread: Flycutters: help to understand 3 different types
09/12/2018 16:35:24

Good afternoon,

One of the most useful tools in my workshop is a little fly cutter made to a design that appeared in the Live Steam magazine many years ago, it's probably no more than 3/4" diameter and give about a 7/8" diameter sweep with a 3/16" square HSS tool bit. I use it for finishing cuts taking off no more than .001" at about 1600 rpm with a dead slow feed results in a finish like a surface grinder! Wonderful.

Regards

Bob

Thread: Death of Model Engineering?
15/11/2018 17:22:11

Hi all,

Is it dying/, i think not but the whole hobby has changed and it will continue to evolve, I've been at this game now for over sixty years, I started at school and I still find it a joy today, it's interesting to hear the doom sayers out there, Percival Marshall back in 1908 was concerned there seemed to be little interest from the younger generation and sadly to many of the=at generation never returned home ten years later. Today we have the technology, CNC water and lased cut components, 3D printed lost wax items becoming available to the home builder, Take a look at any model engineering exhibition and admire the quality of the work produced, compare that to say forty years ago. In those days it was thought a 2" scale traction engine was large, I remember public passenger hauling with a 21/2" gauge Atlantic, look at what the model boat and aircraft folks are doing today, gas turbines, sub miniature radio gear, no it ain't dying, too many doom sayers out there and there is still interest by a young membership, my own society's both have an active young membership so the interest hasn't waned, it's still there.

Regards,

Bob

Thread: Drilling Bronze?
26/10/2018 12:57:00

Good afternoon all,

Re drilling phosphor bronze:-

Perhaps the O/D expands outwards & the I/D expands inwards onto the drill?

Tony

Exactly.

Bob

18/10/2018 19:10:52

Hello Vic,

Generally with drawn phosphor bronze there is a need for an accurate hole, for perhaps a bearing, then the drilling process is fairly simple, resharpen a drill slightly off centre so it cuts slightly over size but making sure it is still fractionly under the size for a reamer. The other alternative is to use a slot drill of the appropiate size, a long reach one if the hole is fairly deep. I keep a box of resharpened slightly off centred drills specificly for drawn phosphor bronze work; also I will always turn and drill drawn phosphor bronze without any lubricant but for threading and tapping work I always use Trefolex cutting paste cleaned after with white sprit.

I hope tihis is of some assistance.

Bob

Thread: 5 inch Scamp.
12/10/2018 16:54:03

Good afternoon Luke,

I have all the Engineering in Miniature editions covering the construction of Scamp, you are quite welcome to borrow them. If it's of any help I'm intending to be at the park tomorrow providing it doesn't tip down. Don't buy anything yet as I've shed loads of material that may be useful.

Regards,

Bob

Thread: Problems with a breadmaker
28/09/2018 15:25:23

Whato everyone,

No problems with my bread maker, couple of glasses of red wine and she's away!

Regards,

Bob

Thread: Beginners new build questions
26/09/2018 21:16:15

Hello Tomasz,

Welcome to the forum; I think the GLR drawings are re-drawn, old man Kennion had some sort of trading agreement with the designer LBSC and the others sorce their drawings via the copyright holder Sarick?, look down the adverts to the right if these posts for a link. I have drawings for another of his designs from both Kennions and the then providers and I have to say Kennion's are much clearer. Juliet although a freelance it's a "beginners" engine and I built one with Baker gear many years ago as my first project, There are web sites out there with the whole serial describing the construction (the words and music as LBSC called them). There are loads of Juliets built over the years and they all go well. For a slightly more up market design based on a full sized prototype then I'd suggest Rob Roy, most of the suppliers can supply the castings and materials and again there have been hundreds built; there is a book detailing the construction of the locomotive available and they all go well, a good fun engine. What I would suggest if you have'nt already done so is join your local club or one in your area, generally shed loads of help, assistance, ideas etc.

Regards

Bob

Thread: Friction Turning a Smoke Box Door
29/07/2018 14:04:55

Hi Stewart,

It's a neat trick, I use double sided carpet tape. easy to shift after turning with the use of sticky lable remover.

Regards,

Bob

Thread: Cast Iron bearings..?
28/07/2018 10:12:01

Good morning Ron,

I've used continually or proof machined cast iron for axle boxes on my locomotives for the last 30 - 40 years and expect to still continue to do the same; my theory being that my old mum's treadle operated sewing machine never wore out and at times when she was going at full tilt the machine was operating at something like 700 strokes per minute, all on plain cast iron bearings with just a drop of Singer sewing machine oil! As a tight fisted old so-n-so i will not pay for some miserable lumps of gunmetal sold as axlebox material, further I can supply my own blowholes and that applies to cylinder castings also.

Regards,

Bob

Thread: Minnie Traction Engine - Water Gauge
12/06/2018 10:25:33

Hello Malcolm,

I'm with Julian on the subject of boiler fittings, they are very satisfying components to make, further most commercial boiler fittings seem to be made from brass, and generally where fitted below the water line will slowly dissolve before your very eyes! The water gauge for Minnie as pointed out is specifically designed for that engine, so I'd doubt if a suitable item is made commercially.

Regards,

Bob

Thread: Greetings from L.A.
31/05/2018 19:52:56

Welcolme Alan,

I thought by LA you meant Littlehampton!

Bob ( in Sussex)

Thread: Repairing a Verdict Dial Test Indicator
01/05/2018 15:44:17

Hi chaps,

Try www.mjallen.co.uk they make the Verdict DTI can overhaul yours and probably supply replacement parts for the reverse toggle.

Regards,

Bob

Thread: Soft Solder Paste
01/05/2018 15:36:55

Hi folks,

Soft solder paste can be brought back to life with a few spots of water, simples. I've done this for years and it works well.

Regards,

Bob

Thread: ME Vertical Boiler & Hand Pump
19/03/2018 17:20:40

Hi all,

I recall old LBSC talked about his two hour hand pump,it now takes me two hours just to look for the materials! , It'll be interesting to see just how long it'll take to describe the construction of this one, not to mention the array of machine tools required to do the job.

Regards,

Bob

15/03/2018 11:31:33

Jason,

Whilst you are at it, can you also ask Martin to explain why it is necassary to produce a ball valve seat with a 15deg angle face as opposed to a flat seat when the ball in fact seats on a knife edge contact, also a 5.5 mm slot drill will produce the seat just as easy.

Regards,

Bob

Thread: FREE TO GOOD HOME
27/02/2018 14:34:42

Hi John,

That's a brilliant idea, like yourself I've got hundreds, I go from November 1959 to date, I store them in the loft, they're over our bedroom but as luck will have it they're over my wife's side! But I'll keep that idea in mind.

Regards,

Bob

Thread: Advantages of Hackworth Valve gear?
04/02/2018 15:53:44

Good afternoon,

I think most have concured the gear is fairly simple and in the context of full sized locomotives (mostly narrow gauge industrial types) it was simple and cheap to produce, most locomotives of that type were employed on very short trips where economics in respect of coal consumption were not really considered, now, if it was any good the main line operators would have used it. I don't think Riddles would have considered it suitable for say the likes of the Britannias or the 9Fs, no, it may be suitable for the likes of a narrow gauge shunting type shuffling up and down a few yards as and when demand required.

Regards,

Bob

Thread: silver solddering etc.
24/01/2018 11:29:40

Good morning Stephen,

I have to agree with CuP, the Sievert range will do most jobs, As a satisfied user from the mid sixties and having silver brazed up to and including large 5" gauge locomotive copper boilers down to fine scale steel fabrications i would not consider any other brand. I know of the Bullfinch torches but I'm unable to give an opinion and know of the Rothenberger brand, those being generally designed for specific purposes mainly associated with the plumbing, heating and air conditioning trades.

Regards,

Bob

Thread: Black 5
11/01/2018 12:02:54

Hi Dev,

I've done a bit more investigation on Martin evans 21/2" gauge black five, it was described between 1984 - 1985 in the following issues:-

3728, 3730, 3732, 3734, 3736, 3738, 3740, 3742, 3744, 3746, 3748, 3750, 3752, 3757.

I trust the foregoing may be of assistance.

Regards,

Bob

09/01/2018 21:09:04

Hi Dev,

The 21/2" gauge Black 5 was described the construction in the Model Engineer by Martin Evans either late 1985 and early 1986, the Model Engineers in question may be available from say TEE publishing and the drawings may be available from sarikhobbies.com

Usual disclamers,

Regards,

Bob

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Latest Forum Posts
Support Our Partners
méridienne Nov 18
Eccentric Engineering
Eccentric July 5 2018
Warco
ChesterUK
Ausee.com.au
emcomachinetools
Sarik
TRANSWAVE Converters
Allendale Electronics
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest