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[dstabler]

Side view.  Sorry had to drop resolution to make it fit.

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[dstabler]

Close up of the turn around. 

[ls61]

as you can tell the smart one joins and post, i am just the fabricator and welder

[countryguy]

Sorry Is61 I got in hurry and wasn't going to track down the wifes camera every night. I planned on taking pics.If you have any ? feel free to ask though I haven't lost the pics in my mind yet!

[jackel440]

Looks like a good plan.
I like the P&M extractor like you have copied into your design.Make sure it is easily accessed,as you will get a build up of ash in it I imagine.Which you will need to rake out every so often.
Yeah it doesn't take long till you have a behemoth of steel all welded together.
Oh and welcome to the site you guys!

[jackel440]

as you can tell the smart one joins and post, i am just the fabricator and welder

Well from my experiance the engineers can draw all the pictures they want,but I still have to build and make thier pipe dreams work!
The engineers anymore just tell me what they want to do ,and leave it all up to me.Works out better in the long run as they can never plan for all the unforseen problems.
You guys have an awesome start.Having cad drawings to work off of is nice.I had to make my own prints for my build,but they just turned into guidelines as I changed stuff on the fly all the time.
Now post pics for us to see!

[mikenc]

Like the drawings,great design. I like the P&M design to. If ihad it to do all over again i would buy there OWB instead of the one i bought. But that is 20/20 hind sight. Like the idea of water through grate to, get all the heat you can out of wood. Keep us posted on progress.

[dstabler]

So we are getting ready to go look for some steel for the heat extractor.  We noticed P and M use 1/4 steel for it.  How do you guys think 3/16 would hold up for this part?  We already have a few scrap pieces of it and it would not be directly in the fire box.  Any suggestions?

[dstabler]

ash pan and grate

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[dstabler]

From the other end

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[martyinmi]

A friend of mine built an OWB a few years back with a water grate. His boiler design was square as opposed to round like yours. His grate was, I believe, 18" wide and 4' long. He wisely incorporated a means to shut off and by-pass the grates altogether in the event that he couldn't hold a fire. The only way that he could make it work well for himself was to remove his ash pan altogether and allow that area to fill up with ashes so that the cool pipes wouldn't extinguish the fire. He had to keep the ash level "just so" all the time. He eventually bypassed the water grates so that he could go back to using his ash pan. I spoke to him this past weekend and he said that if he did it again,he would just run two lines with water in them(in a "U" shape) as opposed to all six. He figured that would create a few ridges for coals to sit on.

   Your project looks great! Keep the pics coming. 

[ls61]

anyone on the idea of 3/16 or 1/4 for the exhaust chimney

[willieG]

anyone on the idea of 3/16 or 1/4 for the exhaust chimney

mine is schedule 40, 8 inch pipe

[BoilerHouse]

  3/16 should be plenty thick enough.  Easily replaced should it ever wear out.  Mine is the store bought insulated S.S.  Works OK but expensive.

[mikenc]

     Good info about grates, Martyinmi 
3/16 should be ok especially if you already have some. will probably get more heat transfere from 3/16 verses 1/4 to.