Author Topic: A SCOTCH MARINE BOILER FOR MY TRIPLE EXPANSION ENGINE  (Read 3546 times)

Offline crueby

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Re: A SCOTCH MARINE BOILER FOR MY TRIPLE EXPANSION ENGINE
« Reply #30 on: February 24, 2024, 04:06:11 PM »
Terrific!!

Online steamer

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Re: A SCOTCH MARINE BOILER FOR MY TRIPLE EXPANSION ENGINE
« Reply #31 on: February 24, 2024, 04:41:47 PM »
When they were working on reboilering "Sabino" some time back, The Almy boiler had tube headers that were 1 into 4 back into 1      It involved right and left hand pipe threads and was a real PITA to put together!

They built some test headers and could never get the tubes to seal....I can see why.........eventually they welded the headers in another configuration, Which didn't work so well.. and I'll avoid that conversation......

Later, we found out that Almy would build these headers, and hang them in the brackish salt water next to their factory so that they would "take up" with a bit of rust to seal them    :hellno:

Now the boiler they took out was sched 80 through sched 120 construction. A real beast, and was built in 1942 IIRC.    So it lasted a good while......

How rust as a sealer compares to Loctite....well.   I'll let you decide on that.... 
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline crueby

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Re: A SCOTCH MARINE BOILER FOR MY TRIPLE EXPANSION ENGINE
« Reply #32 on: February 24, 2024, 04:47:37 PM »
That 1:4:1 arrangement is quite complex, but gave them a lot of surface area for heating. The relatively small top drum must have meant keeping a close eye on the water level and the feed pump?


for models, I'll stick with loctite and solder for sealing!

Online steamer

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Re: A SCOTCH MARINE BOILER FOR MY TRIPLE EXPANSION ENGINE
« Reply #33 on: February 24, 2024, 04:52:43 PM »
That 1:4:1 arrangement is quite complex, but gave them a lot of surface area for heating. The relatively small top drum must have meant keeping a close eye on the water level and the feed pump?


for models, I'll stick with loctite and solder for sealing!

Main drum was 14" sched 120   about 1.25 thick.....or there abouts....      55 gallons of water.....so a VERY fast steamer...

Dave
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline simplyloco

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Re: A SCOTCH MARINE BOILER FOR MY TRIPLE EXPANSION ENGINE
« Reply #34 on: February 25, 2024, 04:09:33 PM »
The water gauge has to 'hang out' the side, and as drawn it looks vulnerable. I made a rigid brass column and mounted the 5mm gauge on that. I used some salvaged pipe as I'd run out of nipples...
It will look better (and vertical) when I redo the pipes with new fittings!

« Last Edit: February 25, 2024, 04:13:59 PM by simplyloco »
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Offline cnr6400

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Re: A SCOTCH MARINE BOILER FOR MY TRIPLE EXPANSION ENGINE
« Reply #35 on: February 26, 2024, 11:56:39 AM »
 :ThumbsUp: :ThumbsUp: :ThumbsUp: :popcorn: :popcorn: :popcorn:
"I've cut that stock three times, and it's still too short!"

Offline simplyloco

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Re: A SCOTCH MARINE BOILER FOR MY TRIPLE EXPANSION ENGINE
« Reply #36 on: February 27, 2024, 06:51:22 PM »
A simple double coil superheater.

It's not pretty, as I got the handing wrong on drilling the shell holes and had to recoil it!
However, it won't be seen and it will do the job required of it!

I started planking the boiler shell today, the planks have a 7 degree bevel each side to close the gaps.  Great fun!

« Last Edit: February 27, 2024, 06:56:51 PM by simplyloco »
Strong minds discuss ideas, average minds discuss events, weak minds discuss people. ― Socrates

Offline simplyloco

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Re: A SCOTCH MARINE BOILER FOR MY TRIPLE EXPANSION ENGINE
« Reply #37 on: February 28, 2024, 06:48:43 PM »
More planking!

This is the result of two hours concentration, getting the planks to fit each other and the various bushes. Not perfect, but it's only an old boiler...
Strong minds discuss ideas, average minds discuss events, weak minds discuss people. ― Socrates

Offline crueby

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Re: A SCOTCH MARINE BOILER FOR MY TRIPLE EXPANSION ENGINE
« Reply #38 on: February 28, 2024, 06:52:16 PM »
Nice!  How are they held on? Glue, metal straps, ?

Offline simplyloco

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Re: A SCOTCH MARINE BOILER FOR MY TRIPLE EXPANSION ENGINE
« Reply #39 on: February 28, 2024, 06:54:00 PM »
Nice!  How are they held on? Glue, metal straps, ?

Medium/high viscosity superglue in the first instance, but close fitting boiler bands will be fitted later.
Strong minds discuss ideas, average minds discuss events, weak minds discuss people. ― Socrates

Offline simplyloco

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Re: A SCOTCH MARINE BOILER FOR MY TRIPLE EXPANSION ENGINE
« Reply #40 on: February 29, 2024, 06:56:43 PM »
Finished Planking the Boiler Shell.

I'm still waiting for the 150 psi pressure gauge and a globe valve for the steam fountain, and I need to tidy up the water gauge connections, and find some black high temp paint, but it looks nice enough and hopefully will pass muster alongside the Triple!
Well pleased.
Strong minds discuss ideas, average minds discuss events, weak minds discuss people. ― Socrates

Offline Laurentic

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Re: A SCOTCH MARINE BOILER FOR MY TRIPLE EXPANSION ENGINE
« Reply #41 on: February 29, 2024, 07:48:28 PM »
Very good, nearly there!

The problem here, with me, is, you've now got me reading up K Harris's Model Boiler & BolierMaking book, and I have too much to do on IC engines stuff with not enough time at the moment as it is.

Chris

Offline Vixen

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Re: A SCOTCH MARINE BOILER FOR MY TRIPLE EXPANSION ENGINE
« Reply #42 on: February 29, 2024, 07:57:10 PM »
John,
Your new boiler looks very smart. I love the contrast between the dark timber cladding and the brass bands. Waiting for the sights sounds and smells of it driving the triple

Mike
It is the journey that matters, not the destination

Sometimes, it can be a long and winding road

Offline Michael S.

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Re: A SCOTCH MARINE BOILER FOR MY TRIPLE EXPANSION ENGINE
« Reply #43 on: February 29, 2024, 08:12:32 PM »
I congratulate. You quickly managed to create a beautiful boiler. The wood paneling looks very good.

Michael

Online Kim

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Re: A SCOTCH MARINE BOILER FOR MY TRIPLE EXPANSION ENGINE
« Reply #44 on: February 29, 2024, 10:37:46 PM »
You have really made short work of this project!  You must be taking a page from Chris's book and using some of those extra days, or living in his alternate time dimension or something.  It looks great!  :ThumbsUp: :popcorn:

Kim

 

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