Member postings for Brian G

Checking online, 80 psi = 162 Centigrade and the melting point of acrylic is 160 Centigrade, so I would say no. Even though the melting point can be modified, it would probably have become softened well before that.

Glass tube isn't that hard to snap to length if you first score it with a diamond file.

Brian

Does anybody remember Norton's "Wulf" stepped piston twin? This separated the oily bits from the fuel-air by using a stepped piston with the lower annular portion acting as a compressor for the other cylinder. If I remember rightly fuel lubricated the smaller piston rings, so it might not be suitable for a gas fueled engine without some form of cylinder injection.

Brian

Are you sure it is UNS? There is a 5/16 x 36 Whitform tap on eBay right now, I suppose almost anything is possible.

Brian

I gather you don't remember the McLibel case? If I understand correctly the ECHR ruling did not completely remove trade libel from English law, just raised the bar a little.

Brian

Perhaps smart TVs will eventually have an application that automatically mutes Danny Baker?

I would rather have seen a rerun of the original episode of "One Foot in the Past" from which much of the programme was taken, or for that matter anything with Bob Symes.

Brian

Hello Ben

I found this company listing 3.5" gauge kits for 9' wooden and 10' steel underframes as well as for wagon bodies.. http://peterwoodswagons.co.uk/ I've no idea what they are like but it cannot hurt to ask them.

Brian

Thanks Jason, I really should learn to read to the bottom.

Brian

I assume that if museum buses are being used, they will not be wheelchair accessible. Will there be any on-site disabled parking?

Brian

Is there a vinegar smell? Hard screwdriver handles (particularly the amber translucent ones) are typically made from cellulose acetate and sweat acetic acid as they decompose. I read an article on doll collectors who have problems with this "plastic cancer" too, as the acetic acid speeds up the decomposition of adjacent dolls, and I imaging the same will happen with screwdrivers. As far as I know there is no treatment, although isolation and ventilation can reduce its spread.

The soft screwdriver handle could be PVC which can be attacked by oils and solvents or may just leach out plasticiser of its own accord, as I suspect is happening with the TV. Washing doesn't get rid of it and solvents just make it worse. Between plastic degradation, LCD breakdown and electrolytic capacitors popping, future collectors may find late 20th/early 21st century consumer products increasingly rare.

Brian

I would worry about it working against the chuck jaws as nearly 4' of bar unsupported behind the chuck has a lot of leverage. Perhaps a bush turned to fit at the back of the spindle would help as well? This could be a close fit on the bar, or more universal using radial screws to clamp the bar.

Brian

As a child I saw a TV fall from the back of a Radio Rentals van doing about 25 mph along the High Street, I was amazed that it didn't break the screen, just scratch it, especially after all of my Dad's warnings about never playing in the front room because the television was so fragile.

Brian

To be honest, working round it isn't that difficult for diameter at least - I wouldn't cut far without using a micrometer anyway, and on a 10 thou cut the error in the graduation is only 0.000157", still less than 1/2 a thou on diameter.

Brian

If buying a new "imperial" lathe I would want to check very carefully that it was actually imperial, and didn't just have 1mm screws and 0.025mm divisions numbered to 40 like a mini lathe. It just feels like a bodge.

Brian

I have the metric spanners and metric thread, feeler and radius gauges, all carrying broad arrows, that were issued to my father, together with a letter confirming that they were a personal issue, and to be his property. I wonder if the dockyard management thought it cheaper to give all fitters one set of tools when metrication came in than to issue tools and then have to replace any lost ones?

Fortunately he gave these to me when he retired as after he died my mother would not let me clear out his shed, and years later I found the roof had caved in and everything in there was ruined. It must have made a mark on me, as I am now busily buying AF and WW tools to give my son. Perhaps I hope he will think of me when he uses them?

Brian

After reading Neil Wyatt's Southam article in the ME that arrived this morning I was looking on Kennion's site for the price of the "Tich" hornblocks, and accidentally found the "Big Titch" instead. By my reckoning the drawings and castings come out at £819.

Brian

If it is any help, Machine Spares (no connection, just looked about as curious) have diagrams and parts lists online for 5 and 10-speed Mercury drills.

**LINK**

Brian

Is there any justification for assuming that Britain will not continue to manufacture CE marked products, and to require CE marking of products? Despite whatever Boris Johnson may have said, Turkey remains outside the EU and has little prospect of joining in the near future, yet it still requires CE marking of applicable products, as do Norway and Iceland.

Even if we chose to return to the kite mark, we would probably have to equal or exceed the requirement for CE marking in order to obtain mutual recognition of conformity.

Brian

Hence we can buy something from China for less than the UK shipping would cost. Only trouble is No VAT + low wages + no duty + low shipping costs = No British industry.

Brian

Can I recommend backing up a textbook with a circuit simulator. I use Yenka **LINK** It is a simple to use circuit simulator, which allows you to try circuits out whilst only creating virtual smoke - and unlike real circuits, when you get them wrong, clicking on the burnt-out component tells you why it failed. I have managed to forget almost everything I learnt nearly 40 years ago (I tried re-reading Smith and Dorf's "Circuits, Devices and Systems" and just go blank), and have come to rely on this for checking circuits and in particular for stitching together the partial circuits that tend to be shown in text books.

Only hitch is that as it is educational software, with the "Free home licence for other users" you can only use the simulator outside school hours.

Brian

Neither

From Wikipedia

"A cold saw is a circular saw designed to cut metal which uses a toothed blade to transfer the heat A cold saw is a circular saw designed to cut metal which uses a toothed blade to transfer the heat generated by cutting to the chips created by the saw blade, allowing both the blade and material being cut to remain cool. This is contrast to an abrasive saw, which abrades the metal and generates a great deal of heat absorbed by the material being cut and saw blade."

Circular saws of this type have been used to cut aluminium profiles, either upcutting, where the blade rises from the cabinet, or downcutting, sometimes with several saw heads operated simultaneously for many years.

Brian