The Unofficial Mamod and Other Steam Forum

Steve_S · Posted: Sat May 23, 2009 9:23 pm Post subject:

Based on the picture that Frank posted above, I've made this:

The pieces are silver soldered together for strength, then the whole SV/throttle is soft soldered to the top of theboiler.

I have tried to steam it with several different burners but I can't get enough steam pressure. I think I will have to fit a tube right through the boiler from top to bottom, as on a Burnac. That will improve air flow to/from the burner and give a much bigger heating surface. It should be easy enough to solder in a piece of ordinary copper plumbing pipe, and it won't alter the appearance of the boiler. When I've done that I'll need to experiment with burner configurations to get the best results.

rangerssteamtoys · Posted: Sat May 23, 2009 10:44 pm Post subject:

Nive Throttle valve

Those engines do take alot of pressure to run. I could never get my Indx to run via fire. So I made it electric like it supposed to be.

I think the firetube will help out alot for generating enough steam.

Good luck.
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WeedenSteam · Posted: Sun May 24, 2009 2:35 pm Post subject:

[quote="Steve_S"]Based on the picture that Frank posted above, I've made this:
Nice job, Steve, should work just fine!

Frank
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Sandman · Posted: Sun May 24, 2009 4:27 pm Post subject:

Excellent work once again Steve.

That's a work of art mate.

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Steve_S · Posted: Fri May 29, 2009 10:39 pm Post subject:

I have now fitted a vertical tube through the boiler in an attempt to improve steaming. I used ordinary 15mm copper plumbing pipe which I annealed, belled out at the bottom end and soldered in:

It's no exaggeration to say that the addition of the firetube/flue has transformed the performance of the boiler. I'll need to make a burner to suit this boiler, but I tried it by using a Bowman style burner and for the first time this engine ran under its own steam!

Les · Posted: Fri May 29, 2009 11:12 pm Post subject:

That is great to see it steaming, you must be as chuffed as nuts.

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Steve_S · Posted: Fri May 29, 2009 11:15 pm Post subject:

Thanks Les. Yes, chuffed and relieved! I think it'll run better with a bit of tweeking.

Sandman · Posted: Sat May 30, 2009 9:12 am Post subject:

Following this thread has been fascinating.

It's great to see ingenuity at it's best.

You never cease to amaze us Steve.

What a wonderful project.
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Kev&Mel · Posted: Sat May 30, 2009 3:51 pm Post subject:

Very good I like your ideas and problem solving Thumbs up!

rangerssteamtoys · Posted: Sat May 30, 2009 4:14 pm Post subject:

It runs, now just for the burner.
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bigal · Posted: Sat May 30, 2009 9:38 pm Post subject:

WOW that's persistance.

This will no doubt run better than new

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erikl · Posted: Mon Jun 01, 2009 1:38 pm Post subject:

Wow Steve, you're doing a amazing job here! I think most of us would have classified this engine as "beyond repair", but you're brinning it back from the dead.
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Keith S · Posted: Mon Jun 01, 2009 3:35 pm Post subject:

Well, I can say I'm quite impressed. Imagine that. Putting a flue into an old pot-boiler.

madeinenglang · Posted: Mon Jun 01, 2009 7:15 pm Post subject:

Wow Steve,

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Steve_S · Posted: Mon Jun 01, 2009 9:36 pm Post subject:

Thanks for your comments everyone.

There's plenty more to do, but at least it goes now.