The Unofficial Mamod and Other Steam Forum

Titan · Posted: Fri Oct 10, 2008 12:37 pm Post subject: Titans Table

I have taken the day off and am pretty frantically doing things for this!

Not quite there yet, my secret project looks like being on target for steamable by the end of the weekend - hopefully before!

I will spend lunchtime uploading photos of progress so far.

I have always harboured a desire to build one of these, but it was this thread that really made me decide to get off my behind and do it!

So what is it? Well go and look!!!

http://modelsteam.myfreeforum.org....html&highlight=mamod+fairlie

Enjoy the weekend!
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It's a Mamod Jim, but not as we know it!

toxx · Posted: Fri Oct 10, 2008 12:45 pm Post subject:

... a 'push me - pull you'- loco! I remember that thread, back in January

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Says Tom

... keine Wunder sind vollbracht.
No miracles ... yet.

tmuir · Posted: Fri Oct 10, 2008 12:59 pm Post subject:

Now this will be a forum first. I'm looking forward to the video.
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A nice example of an Australian made Scorpion Donkey Engine

andysleigh · Posted: Fri Oct 10, 2008 1:13 pm Post subject:

You used my idea!

Thats a first, no one useually uses my ideas.!

I cant wait to see it

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Titan · Posted: Fri Oct 10, 2008 1:21 pm Post subject:

Thats Right! A Mamod Double Fairlie! I have no idea if any other exists - a google ony really came up with that earlier thread on this forum. I know Mike Chaney started to build one once, but that was many years ago and I have no idea if he finished it. Well this one WILL be finished and I'll make damn sure it runs well too!

Anyway, here is what I started with at the begining of September:

A rather nice SLK, the remains of an SL1, some left over wheels and cylinders, and a whole load of parts aquired from Forest Classics at the Great Dorset Steam Fair, and also some thick walled drawn brass tube for a boiler!
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It's a Mamod Jim, but not as we know it!

andysleigh · Posted: Fri Oct 10, 2008 1:23 pm Post subject:

looks good Ian.

Cant wait to see the finished loco.

I may have to make one as well some time.
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Titan · Posted: Fri Oct 10, 2008 1:34 pm Post subject:

Me too!

This was the next stage, SLK partly dismantled, the new boiler cut to length and a trial fit of the bodywork. A new cab floor from steel has been constructed, which bolts over the existing floor, which has been shortened slightly. This and the roof are the means by which both halves are joined. The new boiler gives considerable ridgidity to the loco, meaning that the body is effectively a monocoque that does not require a seperate chassis or frame.

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It's a Mamod Jim, but not as we know it!

Titan · Posted: Fri Oct 10, 2008 1:40 pm Post subject:

A comparison of the new boiler and the original from the SLK:

Just a wee bit longer!
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It's a Mamod Jim, but not as we know it!

Titan · Posted: Fri Oct 10, 2008 1:45 pm Post subject:

Another comparison, this time the wall thickness. I expect that I could run this boiler at any pressure I choose!! However it is intended to run it at 40 psi so a considerable factor of safety!!!

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It's a Mamod Jim, but not as we know it!

Titan · Posted: Fri Oct 10, 2008 1:52 pm Post subject:

Now as the drawgear is attached to the bogie on a Fairlie, some surgery was required to the smokeboxes. Firstly, the buffer beams were cut off - if you wanted to keep the mamod couplings and buffers it would be possible to mount these on the bogie. However I am going for chopper couplings so they are surplus to requirements. The edges of the remaining footplate were radiused in a similar manner to the full size Fairlie Locos.

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It's a Mamod Jim, but not as we know it!

Titan · Posted: Fri Oct 10, 2008 2:06 pm Post subject:

Now we're starting to get serious! This is the beginings of the bogie frames - four pieces of steel have been cut to shape - nothing complex, basically four rectangles!

They are not as deep as normal mamod frames - The mamod frames just go up in to the combustion chamber, and as clearance is required on the corners they needed to be thinner here to give clearance. Also, I have arranged that the cylinders are fitted horizontally, partly to copy the full size loco but also for clearance reasons too. This does mean there are no awkward angles to work out and the design is fairly straightforward. In the photo I am just about to drill the mounting holes for the cylinders. Being aware that accuracy is important here, I am using an old port face as a jig. I am also drilling all four frames at once, to ensure that each one is as near identical as possible.

Well thats all for now - still a million things to do - I need to finish silver soldering the boiler, test it and then I have all the pipework and fittings to complete. I won't get it all done today, but it is still possible that it might be steamable before the weekend is out - watch this space!
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It's a Mamod Jim, but not as we know it!

Compound · Posted: Fri Oct 10, 2008 2:39 pm Post subject:

Wow!!
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Dan

www.middletonrailway.org.uk

made-in-england · Posted: Fri Oct 10, 2008 3:13 pm Post subject:

Where they two good locos you have used to make one really good or two duff and still have the other SL1k?

Looks immense tho!
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Roly Williams · Posted: Fri Oct 10, 2008 3:19 pm Post subject:

This is bringing back memories of my three cylinder SE3

I assume you'll be using flexible plastic piping to the two bogies? The new boiler is much more than double the size of the original. What sort of burner will you be using? Will it extend under the whole length?
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Regards
Roly Williams

"God is not dead - he is alive and well and working on a much less ambitious project" (MRFS)

Mamodman123 · Posted: Fri Oct 10, 2008 3:34 pm Post subject: