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Member postings for martin perman

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

Thread: Mystery Bamford engine
26/06/2019 11:25:36


Just PM'd you with my Mag repairer details, ring him after 18:00 though.

Martin P

26/06/2019 10:38:42

Wico,Lucas, ML single cylinder mags all have accessible capacitors

Martin P

26/06/2019 08:41:35

The early magneto's can be reversed but it usually means new mechanical parts including the impulse couplings, changing the direction of a magneto without parts is possible but its not easy and can be hit and miss trying to find the sweet spot. A single cylinder magneto would make life easier to set up and things like the capacitor are usually mounted in the magneto cap and not the windings.

If you can wait until November there is a big bring and buy sale held here where you may find another magneto and parts for the engine.

Martin P

Saturday 2nd November

Cotswold Oil Engine and Preservation Society

Bring and Buy Sales

Oakley Airfield, Worminghall, Bucks HP18 9PH

25/06/2019 22:08:15


The engine has been confirmed as a 2 1/2hp tulip top by a collector of Bamford open cranks and would have had a Webster magneto.

Pat as SM has suggested check the condensor/capacitor.

Martin P

25/06/2019 18:55:19


The correct magneto would be a Websters low tension type, sadly you dont appear to have the mechanism to operate it, which is why it was modified to use a high tension magneto.

if you have not done so remove the points and give them a good clean particularly the contacts as they oxide up, how good is the surpressor/condensor this will kill the spark if dead and remove the coil and put a meter across the two main connections if it reads a dead short it needs rewinding but as you have a spark its unlikely. You may also have a weak magnet, it can be all sorted but I dont know a local mag repairer in your area, my local man is in Wellingborough.

Martin P

25/06/2019 16:28:20

There is a family connection, if you go to this website you can read about the history **LINK**

Martin P

Edited By martin perman on 25/06/2019 16:29:43

24/06/2019 17:28:59


What you appear to have there is a 4 cylinder tractor magneto that has had all four ignition leads linked together and even though I collect engines I cant see how it works, can you take the bakelite cap off and show whats inside the cap and the magneto body, there should be a rotor arm, the duplex chain and sockets are incorrect as it would have been a single chain. If you PM me your email address I will put you in contact with my friend so you can talk direct.

I will also ask on an engine forum if there is anybody near you in Norfolk who maybe able to help.

Martin P

Thread: Can We Be Too Good For Our Own Good - sometimes|?
22/06/2019 09:24:57

My father spent most of his working life as an engineering draftsman and for a while he worked at the company where I served my apprenticeship, one of the apprentices spent six months at university and six months in the factory learning about the busuiness. My father became his mentor and taught him to draw and one afternoon a special bolt from a machine needed to be drawn for manufacturer and it was given to the apprentice, my father said he made a lovely job of the drawing of the bolt but it couldnt be used as when he had been given the bolt the two broken parts were tapped together and that is how it had been drawn, the apprentice was described as being so clever he was thick as he could never see the wood for the tree's.

Martin P

Thread: Making a Start in FreeCAD
20/06/2019 13:04:52


Like others I have tried and failed, many times, to understand 3D/2D drawing programmes and have been loathe to buy expensive software to find I dont understand it, Dave has managed to turn my light on by making it obvious, I think I may have found another manual as well, **LINK**

Martin P

20/06/2019 08:00:29

Only 60 miles from me and worth the journey.

Martin P

Thread: What are these wheels /tyres?
19/06/2019 19:03:18
Posted by An Other on 19/06/2019 18:41:03:

After much searching, I found a repair kit in the UK that had been imported from the US - it uses a sort of gun to push soft rubber mushroom shaped plugs through the tyre from the outside, head-first, then the tyre pressure forces the expanded plug head into contact with the inside wall of the tyre. It works, but cost 48 pounds about 8 years ago, with sufficient plugs to repair 20 holes. An extra bag of 20 plugs was another 10 pounds.

Eventually, the tyres reached a point where I was putting plugs virtually alongside each other, so I decided to get new tyres - they cost just under 1000 Euros for the four tyres (two large and two small), and that was a (relatively) good offer. I am now going to buy several goats - they have to be cheaper and more efficient!.

I don't want to put you off using these mower tyres, just to give warning. I think if you can get tyres for the 'road-going' type of ATV, then they will be made of rubber, and this problem will not occur, but they may still be expensive.

The repair kit you describe is used by the AA, my Daughter had a puncture caused by a screw and she could'nt change the wheel because unknown to her a tyre company had buggered the security nut whilst changing the tyre and even Dad couldn't undo it without damaging the alloy rim, the AA was called and the technician could'nt undo the nut so he produced the tool to put a plug inside from the outside but stated it was a get you home fix, 50mph max, and didnt use adhesives so could leak, the next morning she had to pump the tyre up to get the car to her Ford dealer to remove the nut and fit her a new tyre.

Martin P

Thread: Making a Start in FreeCAD
19/06/2019 14:11:37

Dave thanks for that, will have a play tonight.

Martin P

Thread: What are these wheels /tyres?
19/06/2019 14:05:28

Agree with Jason, they are ATV tyres, they must have sizes on them.

Martin P

Thread: Large scale hit and miss engine castings
18/06/2019 17:07:40

I've always wanted to build the Engineers Emporium "Junior" but until I stop making bits for 20 plus of its full size Lister brothers I have enough on my hands for now, my wife would love me to have a nice small engine to rally but I enjoy playing with my present collection.

Martin P

17/06/2019 20:20:22

I thought Alyn had gone belly up.

Martin P

Thread: Material storage fpr Lathe/other machines
13/06/2019 11:58:26

I visited Whitwell Vintage rally last Sunday and found a wood worker selling his wares particularly seed boxes, 15"x9" 2" deep at three for £5 so bought six, ideal for tool and material storage.

Martin P

Thread: Tyrosemiophilia
07/06/2019 13:25:37

Do 140+ Petrol, Paraffin and Meths camping stoves count.

Martin P

Thread: Is CAD for Me?
02/06/2019 19:14:51
Posted by Nigel Graham 2 on 02/06/2019 16:43:27:

Nothing in the workshop for now, as I've only just returned from hospital with a new left knee joint. I suppose at tome time they'd fitted white-metalled liners and a Stauffer grease lubricator...

My last but one pre-op foray was to the exhibition at Doncaster, but I don't think I will go there again. You'd expect a major racecourse to be easily accessible in outer suburbia if not countryside, not practically in the city centre or the rail-freight terminal. Rip-off food prices too, but blame the race-course managers, not the exhibition organisers, for what the equine world probably thinks pennies. Then via a stop in the Dales, to Kendal to collect my purchased Myford gearbox. The lady in the box on the dashboard sent me on a very strange point-to-point to the seller's home, though to be fair to her, she could not have known a particular road was closed for repairs.


So what to do while temporarily crocked and glad I'm not a race-nag....


I can still fight with TurboCAD. I thought basic 'Access' was hard!

Still, I had a basic-level geological article for my caving-club Journal to complete, and TurboCAD grudgingly allowed me to complete one 2D and two 3D diagrams for it. In time akin to knacker's-yard stagger rather than 13.375 Furlongs Handicap Chase.

They actually look-half reasonable but I was creating diagrammatic sections of hills; and Nature no more builds hills to ISO-approved metric milli-furlongs, than horses to integers of hands (1H = 101.6mm). So no worrying about more than visual alignment, and then by co-ordinates. Assembling 3D drawings elements by the "approved" course totally foxes me, and I've gone to ground on that one.

Nor did I need do what the CAD experts all like to show off 'cos they can: model the item isometrically then take off orthogonal projections from that. Apart from not finding any instructions for that anyway, my workshop drawings need to be orthographic, and I try to make them as accurate as possible (but know how to re-type "wrong" dimension values...). Why waste hours crashing into 3D CAD hurdles too high for me, when I want to make the 3D objects, not their pretty brochure pictures?


I did try Alibre, briefly, to see if it's easier than TC; but an unintended and unexpected succession gap between shop-bought and subscribed MEW issues didn't help me, then I saw the price for the real version. I've also sampled Fusion 360 (free for hobby and student editions presumably, like Alibre's trial edition, stripped of key functions) but went nowhere with that either. Also, both of these seem to insist on isometric-first. Bit like trying to learn to sing from The Ring Cycle libretto.

Ah well, I've still my A0, commercial-standard drawing-board...


I'm glad its not just me, I get bored trying to make something work on these programs, I tried all the so called simple ones and always end up using pen and paper, in my head designs and reading drawings.

I'm computer literate and not daft but CAD drawing for me is lots of time doing nothing.

Martin P

Edited By JasonB on 04/06/2019 16:08:59

Thread: 3" scale Sentinel drawings.
31/05/2019 18:39:05


Again thank you for your help, never had to scale anything before so I've learned a lot today, my TV has died this evening so plenty of computer time looking for info.

Martin P

31/05/2019 17:10:30


Thanks didnt know that, I've tried to PM Diane but there are several Diane's and I dont know her surname.  Paul, I looked at Blackgates last night and found it a very un friendly site to navigate, I still had trouble after you said there was a clayton there.

Next stupid question, to upscale from 2" to 3" do I halve the 2" dim then add the half to the 2" to get 3" i.e 2\50% = 1+2=3"

Martin P

Edited By martin perman on 31/05/2019 17:13:38

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