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Member postings for ronan walsh

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

Thread: Vintage motorbike
19/10/2014 14:21:24
Posted by John Stevenson on 19/10/2014 12:28:20:

Couple of shots of that V6 from the timing side.

Which was a much more interesting side. Crankcase was welded up for about 4 set's a cut and shunt standard cases.

Not only a v6, but converted to overhead cams AND fuel injection. Amazing work by someone. As to the complaints that this is not model engineering, i like many on here have no interest in model making , but have a home workshop, the choice is to be a member here or one of the industry forums. Also there have been recently a good series of articles in the magazine about building motorcycle specials, so this thread is not that far off topic , is it ? Why not have a forum dedidcated to "home workshop" engineering work, separate to model making ?

Thread: Restoring an Elliot Progress Drill
17/10/2014 20:54:58
Posted by Oompa Lumpa on 16/10/2014 22:24:36:

Sadly Ronan they are showing out of stock. I did see some somewhere but I need to rattle the old Grey Matter and try to remember where.
If the spring has broken at the end it is not a difficult job to anneal the spring end and fold it over to form a new hook.

But I do remember someone advertising these.

graham.

Yes i have seen them somewhere else too. They are available , just a matter of tracking one down. I would say its something a small springmaking company could make for you anyway. It would be a pity to scrap a machine thats given so long a service for something so small.

16/10/2014 18:27:20
Posted by Rob Thomson on 16/10/2014 16:43:54:

Graham Hi, Great Restore Job on the Elliot Stand Drill, I have the same model, which we have in use every day for the past 45 years plus, We have just broken the return spring, Are you able to point us in the right direction to obtain a new one or a replacement, if so would very much appreciate a reply so we can carry on drilling for the next 45+ years., Thank You Kind Regards Rob Thomson, Continental Engravers (Precision) Ltd

Rob, if you go to toolco.co.uk and select fobco spares , they have the return springs there, if they are in stock or not is another matter.

Thread: FreeCad
14/10/2014 10:21:23

If you go onto alibres website and click "international resellers" , you can pick your country and it will tell you who they are, afaik you can then buy the software from them on a cd rather then the very process of downloading off the web. I contacted my reseller who is actually very close to where i live, they sell a range of software of all types and are very tech savvy and were able to help me with a glitch when i downloaded the 30 day trail.

14/10/2014 02:39:32
Posted by Bill Pudney on 14/10/2014 01:03:44:

I bought Alibre, had some problems with it so I phoned the local (in Australia) agent. I spoke to someone with an American accent, he described himself as "The Manager for Australia". I described my problem with Alibre, which The Manager didn't attempt to help me with, he went straight into a verbal destruction of my PC, and ended by calling me an idiot.

Now that the computer has been upgraded (?) from Windoze XP, Alibre has been lost, oh dear what a pity

So I reverted to TurboCAD.

Don't mention Alibre!

cheers

Bill

Bill, i am surprised and sorry to hear that you've had problems with alibre, or geomatic as its now called. I downloaded alibre for a 30 day trial and found it excellent , very like the earlier versions of solidworks i had worked with and loved, but could not afford.

13/10/2014 22:28:16

Siemans allow free downloads of their 2d cad programme called solidedge 2d. I did use their 3d solid modelling software in college, very similar in some ways to solidworks, but hugely expensive to get a licence for. Alibre design or geomatic or whatever its called now is very good for the price, probabily ideal for the home user.

http://www.plm.automation.siemens.com/en_us/products/solid-edge/free2d/

Thread: Will this work ?.
11/10/2014 18:44:42

The soluble oil used to "crack" or go off and stink the place out and i was worried about this when i decided to use the suds system in my tom senior. I went to the local engineers suppliers and asked for a small (5 litre) container of soluble oil and asked if there was a possiblility that it would go off, he assured me it wouldn't. A year later its still fine, no nasty pongs and you do get longer from cutting tools, then by using them dry.

Thread: McMaster - Any Old Iron?
11/10/2014 18:34:53

Sadly the problem with power hacksaws in industry is they get zero respect. someone has a job to do, they want to get the stock cut as quickly as possible to start machining or fabrication. They , in my experience, end up stuck in an untidy dirty corner and just used and abused , and apart from an occasional new blade, very little maintenance.

Thread: 1950's Selecta suds pump wiring - capacitor?
11/10/2014 18:21:51

It sounds like a three phase motor that some one has "converted" to single phase by putting a capacitor across two of the legs.

Thread: Vintage motorbike
09/10/2014 20:13:03

Someone who does amazing motorcycle engine projects, and in a home workshop is allen millyard. Below is a link to a page about his build of a 5 litre v-twin. He has previously made a 2 litre v-8 splicing together two kawasaki z-1's.

http://thekneeslider.com/allen-millyard-builds-a-5-liter-v-twin/

09/10/2014 03:20:50
Posted by Muzzer on 09/10/2014 01:49:54:

I only vaguely recall from my student days how to calculate the out of balance forces on various engine configurations and it's something I chose not to revisit although it is quite interesting. The closest twin to having perfect primary balance is the boxer (opposed pistons ) with 2 crank pins. Almost any vee is going to shake like a pig unless you use balancer shafts because the primary balance is always going to be poor in both axes. The vertical twin is a pig too, whether you have the pistons going up and down together or 180 degrees apart.

Quite well written article in Wikipedia compares various engines - including a fairly lengthy section about steam engines towards the bottom.

Murray

There are usually two angles talked about with parallel twins, namely 180* and 360*, the british twin being invariably 360* with the pistons rising and falling in unison with each other. This leads to vibration in the vertical plane as the pistons stop at tdc and bdc. 180* twins have the pistons obviously out of phase by 180* and this causes a rocking vibration.

However a real solution to vibration and associated problems (shuffling engine crankcases, crank bearing housings going out of round etc) is the 90* or 270* crank twin. It removes a lot of vibration because when one piston is at tdc or bdc the other piston is mid-stroke and therefore travelling at its fastest speed, and the pistons are never stopped together. If the vibration of a 90* 650cc twin is compared to an identically tuned 360* 650cc engine , the vibration is reduced by something in the order of 60%. Before someone says why didn't someone tell the british manufacturers about this, they did. Phil Irving who was an engineer with vincent motorcycles went around the various factories touting this idea and no one wanted to know, as the 90* engine was more expensive to make , and bsa, triumph and norton couldn't make the 360* engines quickly enough the demand was so strong. However about ten years ago Yamaha brought out an 850 twin called the trx which had a 90* engine, it didn' t sell particularly well but has a niche following.

I built a 90* crank for a triumph from a norton commando crankshaft , the two throws bolted to a central piece of en24t, if i can find some pictures i'll throw them up here. But this modification is very popular with yamaha xs650 owners and some british bike owners too !

08/10/2014 19:57:57

Triumph sent an engine to one of the engineering departments of GEC to see if their experts could tame the vibration, they could and did make a triumph 650 twin engine that you could balance a coin on its edge while it ran. Sadly the engineering was too expensive for triumph to encorporate into the production machines.

A great insight into all things british bike is hughie hancox's excellent book "Tales of triumph and the meriden factory"

http://www.amazon.co.uk/Tales-Triumph-Motorcycles-Meriden-Factory/dp/1901295672/ref=sr_1_2?s=books&ie=UTF8&qid=1412794579&sr=1-2

08/10/2014 18:24:57
Posted by richard allen 6 on 08/10/2014 07:40:11:
Posted by ronan walsh on 08/10/2014 00:42:58:

I Have we forgotten the Hesketh?

Actually yes i have, but seeing as they were so scarce and expensive thats an easy thing to do !

08/10/2014 18:17:37

Triples ehh ? I have the old lump below adoring one of my tool chests. The plan is to put it into a featherbed frame i have, when money and space allow. The twins were good up until they hit about 30 bhp, edward turner thought it a bad idea to even take them out to 650cc's. If you are lucky enough to be able to try an early thunderbird or golden flash, and then sample a late 60's 650 twin , the difference should be extremely noticable. I have a mid 50's BSA a10 golden flash which were built in a low state of tune, and its a very pleasant machine, where as my late 60's triumph 500 is in a much higher state of tune and is a bit tiresome to ride far.

The british bike industry went from one of the most innovative and inventive pre-war to knocking out the usual same old singles and twins post war.013.jpg

Thread: 17-4 ph stainless steel stockists ?
08/10/2014 00:44:28

Thanks JasonB, i'll email them tomorrow and see if they have what i want.

Thread: Vintage motorbike
08/10/2014 00:42:58

Its amazing , but the british bike industry made a good few models of v-twin's in large capacities before the second world war, but only vincent made one after (maybe jap engines too ?). Bsa made a 1,000cc v-twin and it was marketed as a workhorse used to drag massive tradesmens sidecars about. The parallel twin was a developmental dead end compared to the better balanced v-twins.

Thread: 17-4 ph stainless steel stockists ?
07/10/2014 13:51:01

Can anyone tell me a steel stockists in the uk that would stock 17-4ph stainless steel ? I know there are stockists that want to sell you steel by the lorry load, but i only want a small amount.

Thread: Workshop air conditioning
06/10/2014 00:30:03

Is the heating function a separate system within the air con unit ? Is the heater just a simple electric element and nothing to do with the air conditioning ?

Thread: Milling Vice ......... Avice.
06/10/2014 00:27:24

Someone on here recently bought a precision vice for their mill just like the one in the link below at the top of the page. Not too expensive and seem to be able to open very widely for holding large work. I am considering buying one for myself.

http://www.arceurotrade.co.uk/Catalogue/Workholding/Machine-Vices

Thread: Please take care when posting or responding off forum
04/10/2014 19:07:23

Maybe have a minimum number of posts before a forum member can place a for sale advert ?

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