DSR3 afterburners (riser tubes) in the US: who wants one?

I've received a quote from Belgium for pallets of 10 afterburners, of the same type being used by the Loam Freemanship, who have worked with Peter van den Berg.

Sizes and prices (without shipping) were quoted as follows:

177mm ID x 305mm long, 30 mm thickness (approx. 7x12x1.2", good for a 6" system), 10 for 663 euros or about $71 each

240mm ID x 416mm long, 30 mm thickness (approx. 9.4x16.3x1.2", good for an 8" system), 10 for 838 euros or about $90 each.

I am looking into what it will take to get them delivered to my address near Reading PA. From there I could potentially ship them individually to others in the US, or hold them for pickup. I would provide them to you at my cost, I'm not looking to make a profit. Even if shipping triples the price to you, it still beats the best quote anyone has reported from a US provider for vacuum-formed ceramic fiber tubes. And these tubes have a track record in Europe, with clay mixed in for added structural integrity, which as far as I know the US suppliers are not offering.

Please let me know what size and quantity you are interested in.

Also, if anyone has any pointers on arranging shipping across the pond, please let me know.

Are photos available for those who dont know anything?

John C Daley wrote:Are photos available for those who dont know anything?

You should familiarize yourself with the DSR3 design.

Early DSR1,2 development story from 2017-2021, in a nutshell: https://batchrocket.eu/en/designs#dsr

This thread, page 7, post dated 2/3,21, includes a pic of the first DSR3 test model tube:  https://donkey32.proboards.com/thread/3710/dsr1-vortex-aspects-dsr3?page=7

There is also a lot of discussion, and "final" DSR3 core dimensions, discussed here: https://permies.com/t/192518/Planning-DSR-Build-Cooktop-Questions

SketchUp drawings and more pics are downloadable from those threads.

Craig, I took your advice and watched the links.
The afterburner is the cylinder sitting above the firebox
These fireboxs seem different from Rocket Mass Heaters, is this correct?

I guess it's a point for discussion whether to call these a form of rocket combustion core. They do rely on a secondary area or volume and turbulence to get complete combustion. There are plenty of different details in the configurations that can do this.

John C Daley wrote:These fireboxs seem different from Rocket Mass Heaters, is this correct?

I would call the DSR3 a rocket stove, Peter van den Berg does (it is on his batchrocket.eu site) but I haven't been around here long enough to argue any fine points.

There are two basic options after the core:

1) surround the core with thermal mass for the capture and slow release of the heat generated. That could just be a brick/block bell, or could include a bench.

2) minimize the thermal mass, in favor of metal bell(s) that will radiate the heat quickly.

You can also design something in between - a small metal bell on top of some thermal mass. The choice comes down to whether you want steady temperatures in a place you will be in regularly (go for the mass), or you want a fast response to heat a space you aren't in all the time (avoid the mass). I think this is true for anything that burns wood.

Craig Tupper wrote:I've received a quote from Belgium for pallets of 10 afterburners, of the same type being used by the Loam Freemanship, who have worked with Peter van den Berg.

Sizes and prices (without shipping) were quoted as follows:

177mm ID x 305mm long, 30 mm thickness (approx. 7x12x1.2", good for a 6" system), 10 for 663 euros or about $71 each

240mm ID x 416mm long, 30 mm thickness (approx. 9.4x16.3x1.2", good for an 8" system), 10 for 838 euros or about $90 each.

I am looking into what it will take to get them delivered to my address near Reading PA. From there I could potentially ship them individually to others in the US, or hold them for pickup. I would provide them to you at my cost, I'm not looking to make a profit. Even if shipping triples the price to you, it still beats the best quote anyone has reported from a US provider for vacuum-formed ceramic fiber tubes. And these tubes have a track record in Europe, with clay mixed in for added structural integrity, which as far as I know the US suppliers are not offering.

Please let me know what size and quantity you are interested in.

Also, if anyone has any pointers on arranging shipping across the pond, please let me know.

We are interested in the 240mm ID x 416mm long riser tube(s)— I haven’t done enough research to know what all we will be needing but I know we will be installing our RMH before the next winter and we’re looking to create a rather large system. Is this purchase still in the works?

We are in SC & will happily pay any shipping charges necessary.

Thank you!

Chris Vee wrote:We are interested in the 240mm ID x 416mm long riser tube(s)— I haven’t done enough research to know what all we will be needing but I know we will be installing our RMH before the next winter and we’re looking to create a rather large system. Is this purchase still in the works?

We are in SC & will happily pay any shipping charges necessary.

Thank you!

Hi Chris,

It turns out you are the first person to express interest, either here or on the proboards.com site. I'm a little surprised by that, but it is what it is.

I've since learned that shipping costs from Belgium would approximately triple the price of these tubes, assuming I bought them in lots of 20. In other words, I would have to lay out around $4,000 to have 20 tubes delivered. That might still make sense, if there were enough buyers here in the US lined up, but not if you and me are the only ones. There's a chance I might still do it some day, if my son decides to make a business out of building stoves. But that decision is at least a year off.

Would you be interested in a vacuum-formed ceramic fiber tube from Danser in WV? I don't have a quote from them but I'm guessing $400-500 per tube if we bought 2. https://danserinc.com/capabilities-vacuduct/

Craig