Member postings for Carl Wilson 4

Can anyone please assist with the following:- I am trying to find contact details for the person behind the Cabbage Patch Railway website. I believe the gentlemans' name is Ralph.

He gives a description on his site of the construction of a model of 10100 "The Fell" Diesel Mechanical Loco. I built a highly detailed model of this Loco in Meccano, using all pinion differentials. I would be very interested to speak to the modeller and to compare notes.

If anyone knows who is behind this site can they please let me know how to make contact. If you are reading this yourself Sir, I would be very pleased indeed to hear from you.

Many thanks in advance,

Carl.

Jason,

Many thanks!

Carl.

Internal ring gears, where can I obtain some?

Cheers,

|Carl

Hello,

I'm looking to source some internal gear rings for a possible future idea. I am looking at module sizes and up to say mod 1.5. Anyone have any ideas where I could obtain some off the shelf? My thought is that it would vbe much easier to buy them in than to make them myself.

All the best,

Carl.

Hello,

Thanks for all your contributions. I've also worked with hydraulics over many years both in aviation and marine settings.

I'm looking at the feasibility of either trying to produce a gerotor type motor or a radial piston type. The gerotor would probably not be a true gerotor motor but rather an internal gear type motor. Similar to the more familiar external gear pump/motor but with an internal ring gear and smaller planet gear. A crescent shaped lobe seals the intake and outlet areas between the two gears. I'm trying to source some internal gear rings as I think it'll be easier to buy these than to make them. Anyone know of a source?

The radial piston idea could be like a "Staffa" motor. A number of radially mounted fixed pistons would bear against an eccentric on the output shaft. As each piston extends the shaft rotates.

Thanks again for all your help.

Carl.

Hello,

In the middle of a thought experiment that might lead to my building an hydraulic motor.

Seem to remember a few years back seeing an article in either ME or EiM in which the author described construction of petrol/hydraulic loco. Think bent axis hydraulic motors had been made. Can anyone shed any light on this?

Thanks,

Carl.

Update:- I am back in the UK and my Brown and Sharpe type cutters have arrived:-

As I write this the cutters are sitting in a bath of white spirit to remove the packing grease. My next task is going to be to make an arbour to mount these on. Then I can get on with cutting some gears.

Carl.

I am attempting to build a Liquid Fuelled Rocket Engine. You can read about my research and attempts to do this on my blog at www.britishreactionresearch.blogspot.co.uk.

I would be very interested to hear from anyone else, particularly in the United Kingdom, who is working along similar lines. There are many such projects in the US and around the world, but as far as I know mine is the only British one.

Many thanks,

Carl.

Hello,

Plastic garden spray bottle. Remove atomising spray lance and replace with proprietary magnetic base and positionable spout. Fill with your favourite soluble/non soluble lubricant. Drip tray to catch back into a bucket. Pump handle mandraulically. Coolant sprays out, empty bucket back into spray bottle when done. No electricity required.

Carl.

Update:- Have purchased a set of Brown and Sharpe type mod 1.5 cutters and an arbour to mount them on from RDG. I'm starting to lean towards milling the slots for the splines with a slot drill.

Hello all,

A lot of very interesting and illuminating information. Thank you very much to all. Firstly, let me state clearly that when I mentioned and Arbor press I of course meant Arbour press...

Tony:- re material, I have some 6mm aluminium plate that would serve to make the gear blanks from. I thought to use a plastic as it would be easier going, but I am more confident in using aluminium after what you said. Tufnol I can get easily also. I realise that I could buy the gears I require but I think that making them would be a good little exercise. I am going to go with getting a set of Brown and Sharp cutters, RDG do them and I can bear the outlay. My experience in obtaining Harrison Spares leads me to believe that the Brown and Sharp cutters will likely be a snip compared to a set of imperial change gears...Regarding the splines, I had thought about making a single splined bush and using it interchangeably. 3D printing might be an option; I have a friend who just 3D printed a 1/4 scale Merlin engine propshaft, so he could help. I think though that solving the engineering problem of making the spline and then actually doing it is an exercise I need to go through. One idea I had for making the splines was to mill them with a slot drill on a rotary table. I reason that it will not matter too much about the slots having a semi-circular end portion. I will post on the Harrison Group site as I progress.

Andrew:- Many thanks for your kind comments regarding my blog. My experiments in swirl are intended to produce an efficient fuel injector for my projected rocket engine. I studied various texts and then attempted to put the theory into practice. I do not have complex measuring gear for analysing sprays that Universities have access to, but my military engineering training taught me the value of a common sense approach and careful observation. I have also learned that the method of atomisation I'm using, namely swirling the liquid fuel and then shearing it with a co-flowing gas, is also used in oil fired loco boilers where swirled fuel oil is atomised by co-flowing steam.

On the M250, there is a screw cutting box, but it is neccesary to use change wheels on the input to this to obtain a series of pitch ranges. I imagine this was one way of keeping the cost of the machine lower for schools and colleges. Thank you for the information regarding spline cutting. I'm going to look into the vertical slotting head idea though my initial thoughts are it'll be a non starter on my Chester Mill/Drill. Your spline cutter looks very interesting and I am in awe of your skill. I am trying to build up a better machining capability whilst at the same time produce something worthwhile, thereby killing two birds with the one stone. And I sympathise with you on finding the time!

Best wishes all,

Carl.

Hello,

I suspect that you, Sir, are a bit of a genius on the quiet.

Carl.

Hello Ladies and Gentlemen,

Further to my researches into gear manufacture, and to be more specific, making some imperial change gears for my Harrison M250. The Harrison change gears have a female spline as their driving feature, and I have learned from a source on the Yahoo Harrison Lathe Group that such a spline can be made using a keyway broach. This makes sense to me, but I'm wondering, does anyone have any experience in the use of keyway broaches? If so can you give me some pointers? I understand they are used in conjunction with an Arbor press. I hear this is better than using a hydraulic press as there is more feel.

Any advice gratefully received. Many thanks,

Carl.

Hello Mike,

Many thanks for that post. I have posted elsewhere on this site about advice for making gears. The method you show for making the form tool cutter using cone drills is ingenious. You have given me much food for thought!

This forum is truly a mine of information what with all you talented Ladies and Gents and I'm very pleased I subscribed.

Carl.

Yes I would imagine you are. It is a British military thing.

Update:- Ivan law's book is on the way.

Carl.

Hi Muzzer,

Thanks for that. The TIG brazing has seemed almost mythical until now and it is good to know that someone has actually done it.

John/Peter...thats not what the girl I spoke to at my local dealership told me, so maybe you are right and it isn't such a good idea after all.

Hello again Becky,

I have just had another thought re the TIg-ing of thin sheet and it relates to another TIG process that I want to have a go at. This is called "TIG Brazing". The idea is that you use the TIG arc to braze the materials together. This means you use much less current - reckoned to be typically half normal values. The TIG brazing rods are a type of Copper - Silicon alloy, and in some cases Aluminium - Bronze. They are generally covered by BS2901. I think this would be a very good alternate method for joining thin sheet as long as the strength wasn't absolutely critical.

From what I've read so far, you need to be pretty quick with laying the bead, but it sounds very interesting as a technique, and might be something that would work well with your models. You can read more about it here:-

www.weldability-sif.com/media/sif_tips/sif_tips_02_tig_brazing.pdf

I want to have a go at this and intend to do so on my return to the UK. Another positive factor here is that you can join dissimilar metals with it.

Hope this helps,

Carl.

Hello Andrew,

Thank you for taking the time again to post on this subject and for the photograph, plenty of food for thought there!

I was in two minds about wether it would be advisable to take the full depth of the gear tooth in one bite out of the delrin, so thanks for the affirmation. I thought to use delrin as it would be less strain on the machine and less trouble if I make a mistake, which is quite likely! By the same token, using delrin means I will end up with a serviceable end product, once I get it right that is.

Some of the change wheels on my M250 are tufnol and I may opt for that, I will see. Thanks also for the book recommendation, I have several books on machine design and gearing but I'll certainly look it out. Fascinating reading your comments on depthing the teeth, I am looking forward to having a go.

As you have a Harrison M300 I wonder if you are a member of the Yahoo Harrison Lathe Group? It is a useful little thing, I have had several leads on various bits and pieces from it.

One final thing. I had a problem with the torque limiting clutch on the powershaft of my M250, and I also had to source and replace the 240-110V control transformer, and I wrote both of these activities up on my blog. You may find the articles of interest. The blog is mainly concerned with my attempts to build a liquid fuel rocket engine. You can find it here:- www.britishreactionresearch.blogspot.com

Many thanks again,

Carl.

Fair enough point. I suffer from having had things instilled in me using a method known as pain assisted learning. I can't help it I'm afraid.