A SCOTCH MARINE BOILER FOR MY TRIPLE EXPANSION ENGINE

[crueby]

Terrific!!

[steamer]

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   

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.... 

[crueby]

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!

[steamer]

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

[simplyloco]

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!

[cnr6400]

 

[simplyloco]

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!

[simplyloco]

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...

[crueby]

Nice!  How are they held on? Glue, metal straps, ?

[simplyloco]

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.

[simplyloco]

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.

[Laurentic]

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

[Vixen]

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

[Michael S.]

I congratulate. You quickly managed to create a beautiful boiler. The wood paneling looks very good.

Michael

[Kim]

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! 

Kim