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Member postings for noel shelley

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

Thread: There are locomotives.... and there are locomotives.
24/06/2022 10:15:04

A truely marvellous machine ! Cross coupled with a single closed centre spool valve and double acting cylinders would have doubled the power ( for the pedants - almost !), but the lack of adhesion may be a problem. That some of the welding is not of the highest quality doesn't matter - IT WORKS ! 10 out of 10 ! Noel

Thread: Myford Tachometer
23/06/2022 14:05:38

MEW has an article I wrote a year or 2 ago on using and altering the sensor to a device half the size of a matchhead - so small it can be hidden almost anywhere. Noel.

Thread: Wyvern Spark plug
23/06/2022 10:24:38

The main thing is that nothing hits, I once came across an engine that would not run ! The owner had put a long reach plug in and the gap was closed as the piston hit it ! Shorter plug ran fine ! Measure piston height and any head clearance and go from there. Plug position will dictate combustion/flame fromt.. If your near me I could lend you a 10mx1 tap. Good luck. Noel.

Thread: Advice sought on buying a nature watch camera for my garden
22/06/2022 23:54:46


Thread: Model Turbines
22/06/2022 19:41:43

It goes faster when the exhaust iblocked could be that the bearings have become Air Bearings ? Noel

Thread: Bearings
20/06/2022 10:28:50

Sounds like a linisher to me ! If you want it to work well for a while then I would buy good bearings NOT cheap ones. Consider the fact of the rotational speed, cheap ones may be very noisy. Noel

Thread: 'Oo Nicked The Regulator 'Andles?
19/06/2022 22:39:54

For those who have any copper pipe, a recent price scrap was £7.60 a kilo ! Noel.

Thread: Is there an alloy that looks like copper but isnít?
19/06/2022 22:32:08

If it looks like copper, it could be almost anything, with copper in it ! Noel.

Thread: Replacing a 24V AC machine lamp
18/06/2022 21:36:04

A small block bridge rectifier and a capacitor would give you DC, there's almost no heat so provided you can insulate the leads just solder the wires to the bulb, auto motive systems are 28V so youhave many options ! Good luck. Noel

Thread: A TOPICAL point, FANS.
17/06/2022 15:53:59

With the temperature over 30*C a point worth remembering is that IF a cooling fan won't start or runs very slowly, the bushes can soon gather somuch dust/fluff sticking to the lube that they fail to run, A good blast of WD40 type lube will flush the dust and fluff out and all will be well again. IF it is really bed it may need the guard taking off so the blades can be pushed round to get it started. As it starts remember to remove your fingers, and refit the guard. I'm often given catering ones, If I like the owner I fix and return, as there not cheap, and this usually results in food ! Noel.

Thread: Help Needed - Reversing a 240 Volt Motor
17/06/2022 10:22:57

Diogenese has beat me to it ! ONLY the start windings need to be reversed, NOT the run windings. DO NOT use a reversing switch to stop or start the motor, you need a switch before the reverser to start and stop the motor. Noel.

Thread: Centaur Valve Timing
16/06/2022 10:29:34

For engines of this type if the inlet opens at TDC and the exhaust at BDC then it should run UNLESS the ignition timing is out - and sometimes even a VERY small error will be enough to stop it from running. I well remember a briggs and stratton engined rotary grass cutter that was stopped by a rock and proved immpossible to restart, the fly wheel is retained by an ali key. The sudden stop had put a tiny step in the key of a few thou that put the timing out, Filed a new key and off it went again.

There was a very interesting series of articles in ME a few years ago on IC engines, I've worked on IC engines all my life but I learnt quite a lot. Noel.

Thread: Cylinder drain cocks
15/06/2022 18:45:02

Spark erosion will do jobs like this with ease ! Noel

Thread: cutting a square end on a round shaft?
13/06/2022 10:15:06

A good file, a vice and some skill ! If you use the right size bar then there will be not to much metal to remove. KISS. Noel.

Thread: JUN-AIR Compressor
11/06/2022 19:39:33

The tank MUST BE SCRAPPED it can not be repaired ! the item on the right is a safety valve. Noel.

Thread: MYFORD S 7 BELTS ?
11/06/2022 12:16:27

Gentlemen ! I will collect what I believe is the right belts this morning supplied by Hayleys an national bearing and transmission specialist in Kings Lynn. Having found an old myfords spares list, whilst I knew that the secondary belt was an A 29.5, the primary belt was the question ! It is stated as Z870 and that is what I've ordered. I fail to see how a likn belt will transmit power more smoothly than a continuous belt ? Maintaining tension on a link belt is a challenge and on multi step pulleys not easy, at high speeds their mass also can cause issues. Once you understand the workings of angular contact bearings and their setting then changing the secondary belt is no problem and as mine has not been touched in 53 years it will do no harm to reset them.

Put simply, The primary belt is transmitting speed, the secondary is transmitting torque.

The primary belt IS Z section and 870 long the secondary is A section and 780 long ! ( according to Myford)

Why did Ian Bradley not mention setting the headstock bearings in his book on the S7 ? The early (1960s) Myford handbook was not very clear and only a later version clearly laidout the correct proceedure, which is not hard at all provided you understand what your doing. So changing the secondary belt is not difficult. The only thing you need is a pair of slightly alered ER 32 C spanners to set the adjusting rings !

To all who have replied, thankyou, I will report back when the job is done ! Noel.

Thread: Telephone Ringback Code?
11/06/2022 11:26:52

I wondered, when ny line was converted to fibre and they still used the copper line because fibre only carries signals , NO voltage to ring the bell, hence the copper ! If you only have fibre and the mains power fails will your system still work ? It seems that some systems without backup will fail unless they have power. My broadband dies if the power goes ! Noel.

Thread: Electric motor test
10/06/2022 20:23:06

Very much depends on the type of motor, brush or induction and your knowledge. If it's induction then do not by pass the condensers, and fit some sort of switch. Good luck. Noel.

Thread: parting off copper pipe in the lathe
10/06/2022 09:25:06

CAREFULLY wrap a piece of insulating tape round the pipe so the start and finish line up as a line all the way round, this is your guide, then cut with a junior hacksaw ! For larger diameters use the edge of a sheet of paper ! Noel.

Thread: Micromatic Odee-Hone
09/06/2022 13:38:52

A nice tool and quite handy for honing rods,pistons Etc It shows no sign of a mounting so I would take it is hand held, I have used the interior ones to hone bores using paraffin as the lube and to wash debris away. Interesting ! Noel.

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