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Member postings for Bill Dawes

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

Thread: Rothenberger Oxy Propane
08/05/2021 11:21:32

Hi all of you silver soldering gurus.

My quest to finish my Emma Victoria boiler seems relentless.

Got to the 'finished it' stage ready for testing. Decided to start off with a soap bubble leak test with a couple of psi.

First test didn't even register on the pressure gauge, leak inside firebox around one of the inner firebox flanges.

Set to with the propane torch re-soldered, and tested again, leak from other side now and a bit from one of the stays on the outside. pickled again and soldered.

Now ready to test again.

Now my question is, silver soldering a 'small' leak inside the firebox with a hefty propane torch seems like using a sledgehammer to crack a nut.

All that heat going in to get one tiny bit up to temperature.

Does anyone use oxy propane for such jobs. A friend of mine has made a few stationary boilers using oxy acetylene and is perplexed at the thought of having to use huge propane burners but then he is a qualified welding engineer and knows what he is doing.

I have seen Helen at Western Steam making silver soldering a boiler look a doddle, she is using what looks like some form of oxy/fuel system.

I was looking at the Rothenberger Roxy 120L kit on sale at various places including Machine Mart but not sure how long the gas lasts, not long I guess but maybe long enough for leak fixes.

Looked on the Rothenberger website but they don't list a 120L,

Any advice would be appreciated, I have gone away several times to count to ten on this boiler and come very close to chucking it in the scrap bin more than once but I am a very patient chap and never give up (coming close to the first time)

If I ever make another steam loco again (unlikely, don't think I will live long enough) it will not include the boiler, I'll find some other mug, sorry expert to make it.

Bill D.

Thread: My new computer
01/05/2021 15:08:23

I have a Dell, looked at sticker underneath, 'Mad in China'

Bill D.

Thread: Strange Hardness Problem.
29/04/2021 21:58:52

And drilling and boring was a nightmare, hard bits and blow holes, i had to drill well undersize, straighten it out with a boring bar and then finish bore or ream. Must have caused the poor fitters a problem they were that hot coming off the lathe the cold bore must have well undersize. Scraping out was the order of the day, scrapers there's a lost art.

The components mentioned were large hubs for centrifugal fans.

Hope none of the old Alldays & Onions fiitters are reading this!

Bill D.

29/04/2021 21:49:20

I remember in my days as an apprentice during my machine shop experience that turning cast iron could be a pain, it had hard glass like bits in it, could well have been glass mixed in the scrap iron that went into the cupola, we had our own foundry. Castings were much more frequent then (late 50s) largely replaced with fabricated parts now.

Bill D.

Thread: Covid
28/04/2021 19:30:52

At last. Matt Hancock slaps down the media attempt to turn the Covid update into a who paid for Boris's wallpaper session.

Long overdue, should have done that at the start of these updates.


Thread: B&D workmate
26/04/2021 19:08:20

On a similar theme, today I dug out my old B&D Lawnraker. Can't remember when I bought it but I reckon it's 40 years plus. Anyone else got one and knows history. In these days of cordless its a bit of a pain dragging a cable around but it does the trick.

Bill D.

25/04/2021 11:48:22

My son recently sent me a pic of his 7 year old Workmate we bought him as a Christmas present.

This prompted me to send him a pic of mine, an original 'Aircraft Alloy' version going back to early-mid 70's.

A few battle scars and rickety joints, but still in regular use, a bit like me really!!

Probably one of the oldest and most useful tools I have.

Bill D.

Thread: Covid TV updates.
20/04/2021 23:05:30

Question dismissed with the contempt it deserved in the context of the programme content which is supposed to Covid updates. If it was me in a ministers shoes I would have stopped that the first time the media tried it on, I think they have show remarkable tolerence towards the media considering the stupid questions they have asked from time to time (well every time really). One of the many tricks of the media I have observed is asking an unanswerable question.

Bill D.

20/04/2021 19:18:57

Yes I admit I started doing that, a temporary lapse tonight but which served to remind why I did start switching off.

Bill D.

20/04/2021 17:47:31

Having just watched 5pm update today, a 'told you so' feeling came over me.

Nothing to do with Covid which is the whole point, more and more questions are being asked entirely unrelated to Covid, todays hot topic was football super league. Going back some months when the first media nerd asked such a question I expected the (PM or health minister, can't remember who) to firmly say 'this is not PMQ, it's a Covid update. Sadly the question was politely answered, a rod for their own back I mused at the time, sure enough more and more of these questions are being asked, give the media an inch and they'll take a mile.

One question(s) today was nothing to do with Covid at all.

Please ministers, start politely asking the media to stop high jacking Covid updates.

Bill D.

Thread: Tapping Mode on Mill
15/04/2021 19:16:22

I have an SX3 and do use the tapping feature (not always though) treat it very gingerly unless it's a meaty size, say m6 and up or thereabouts. I don't think I would risk it on something like anything less than 6BA and then just a starter backing off frequently, to get the thread in line and finish off by hand.

Bill D.

Thread: BA screws and nuts
08/04/2021 19:31:37

Yes BA-Bolts excellent for stainless steel.

Bill D.

Thread: LED Tubes in the workshop
08/04/2021 19:25:33

Interesting, been thinking of doing the same for some time but waiting for fluorescent ones to fail,

Bill D.

Thread: Recommended suppliers and services
07/04/2021 23:08:09

I have found that all the companies mentioned and more have given me excellent service, ARC are legendary, CUP alloys, Macc models, BA bolts for SS fixings, Lee springs,The mesh company, EKP supplies for case hardening compound I could go on and on, we are very fortunate in our hobby to have such a wealth of excellent suppliers.

Bill D.

Thread: Gauge glass dimensions
06/04/2021 18:11:37

Thanks Ron, I am ok thanks, cutting a very long story short I have had a lot of severe upset tums since xmas so much so that on two occasions I was taken into A&E after blacking out, problem of low electrolyte levels. Visit to GP (yes an actual face to face) he arranged for this scan, all looked fine apart from a bladder full to bursting, they couldn't believe I was not in pain. So another day as they say. Decided that having tried this getting old business I am going to tick the opt out box.

Bill D.

Thread: Noise from Crompton Parkinson 3 phase 1/2 HP motor
05/04/2021 22:17:12

Sounds like what is called an open protected frame, or drip proof, probably IP22 or 23 rating.

Bill D.

Thread: Using two torches
05/04/2021 22:12:47

Ah, that's the next question then, Y piece after regulator, or Y piece first and regulator for each torch.

Bill D.

05/04/2021 18:04:06

it's a bit late in the day really to ask this question as I have almost finished my Emma Victoria boiler but noticed from various posts and videos in the past that a lot of people use two propane torches when silver soldering so my question is do you need two cylinders for this or is it possible (and safe) to connect to one cylinder.

Gave it a low pressure pneumatic soap bubble test to start with and have a few leaks to sort out, this is where I wish I was using something like oxy-propane rather than having a total re-heat every time with just propane.

Bill D.

Thread: Noise from Crompton Parkinson 3 phase 1/2 HP motor
05/04/2021 16:47:27

Ah, I was assuming this was an external fan, usually mounted on a non drive end shaft extension the impeller being enclosed with a cowl that has apertures in the end, the centrifugal impeller draws air in axially through the apertures and discharged radially from the cowl circumference, guided over the motor. This is the method used on standard industrial totally enclosed squirrel cage motors. Yours maybe a non ventilated type or maybe the impeller is missing?

Bill D.

05/04/2021 13:15:17

Regardless of fan direction the axial load will always be in direction away from motor, ie the fan impeller is trying to pull itself off the shaft (not that an impeller of that size will have much thrust anyway)

If blades are radial, (omni-directional) which they probably are on a small motor, flow will be much the same, if blades are sloping (uni-directional) flow will differ but again with such a small fan I wouldn't expect variation in thrust to be of any significance.

I am talking about centrifugal impellers here which in my experience is the norm for motor cooling fans, an axial impeller is different, flow direction will depend on rotation, flows in each direction dependent on blade angle. Thrust in the case of an axial flow will vary according to direction of rotation.

Bill D.

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