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Post by matthewwalker on Nov 18, 2016 12:31:28 GMT -8
No Peter, the science is out now, and that's why I wanted to share with you. I have tried with my Father to no avail, although you are in fantastic shape for any one of any age, the ability to build muscle and strength is one capability our bodies never lose and will benefit us immensely. It does this at any age, but it is particularly effective for us as we age. Seriously, I'm not proposing you become a bodybuilder. Just, look into gently progressive overload. You do it anyway when you lug all those bricks around you mad man. Just, you know, check out the science. There are always exercises we can do safely and progressively load them to put some muscle on our frames and take a load off of our joints and all.
Like I said, I'm just excited about it. Progress has been hard to find for me as I get older, and I've been enjoying my ring workouts so much, I just wanted to share with you. Anyway, wayyyyyyy off topic here.....apologies folks.
I'll wrap it up with a little back on topic, tidbit for those of you following the excess air talk, who don't have tester machines. Contrary to the way it seems, you get low excess O2 by having large primary air and flashing off all of the wood. This is why J tubes do it pretty wall, naturally. Full out, all the time, and they can handle it. It's why my numbers, with shut down air, will probably always be higher in excess O2 than Peter's. Took me a while to learn that.
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Post by matthewwalker on Jan 18, 2017 7:59:06 GMT -8
So you bought it full price? What's the standard size and how much costeth it? Do you expect similar performance as IFB or different in some aspect? Edit: Oh, my questions cannot be answered as this is a photo of your commercial product, never mind then. walkerstoves.com/super-hot-shippable-cores.htmlNo, I didn't answer your questions because like all of these refractory products, you need to find your local supplier and get pricing for your project. Shipping is the killer, and what I pay is a reflection of my remote location and shipping costs. Each supplier will have different grades, sizes, and pricing. Do your own sourcing or you are going to pay for someone else to do it, or for shipping big, heavy, fragile things. It varies so much, from supplier to supplier. For example, there is a place in Wisconsin that sells riser sections for $6 a foot. They suck at shipping. |
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Post by wiscojames on Jan 18, 2017 8:15:45 GMT -8
Really? Who in Wisconsin? I am here and might make a run if it's in my neck of these woods.
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Post by matthewwalker on Jan 18, 2017 8:18:41 GMT -8
Firebrick Engineers....they have a few locations. Lots of fun stuff.
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Post by patamos on Mar 10, 2017 16:06:58 GMT -8
Thanks for sharing the pics Matt  FWIW, I have been painting the boards with waterglass. soaks in nice. hardens up somewhat. and prevents dusting while i am handling it… Drooster most major cities will have a store or two that specialize in refractory supplies and high heat duty materials. eg. fire bircks, kiln supplies, bagged castables … Closest to me is 'Improheat' in Vancouver BC. cost around $10 cdn. per sq.ft. for 1" thickness. |
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Post by pyrophile on Mar 11, 2017 16:28:13 GMT -8
Hi all!
Matt, could you say again (I did not find the answer) how much time does last a full batch of wood in the firebox of your cookstove? For how many kilograms of wood?
Thank you very much!
Benoit
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Post by matthewwalker on Mar 11, 2017 20:49:54 GMT -8
It's variable Benoit. The brick firebox is quite large, I rarely use all of the capacity. A typical load is about 3-4kg of dry Douglas Fir and will burn for about an hour. The primary can be closed quite a bit when it is hot, and a load can last for 2-3 hours running like that. Depending on fuel and conditions, I can reload without lighting again within 4-6 hours or so. I tend to keep it going throughout the day with the occasional load.
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Post by pyrophile on Mar 12, 2017 0:31:38 GMT -8
Thank You, Matt!
I am wondering if this firebox wouldn't be a bit too powerfull for a single room (it depends of the room, the weather, etc. of course!); maybe I should add a mass chimney or a bench to use the possible extra heat..
Last year, I built a cookstove -with a bell wall behind it- but for me it was maybe a bit too powerfull because of a large cooking plate and the difficulty to set down the power while maintaining clean combustion.
Setting down the power while maintaining clean combustion AND a big enough firebox is not easy!Many mass stoves are roughly around about 4 kW, wich is not so much!
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Post by briank on Mar 26, 2017 19:47:02 GMT -8
Thanks Matt I have read that you used low density firebrick, but they are not easy to get where I live. Have you already used regular firebrick for your core? Weight for my firebrick is about 2kg (4.4 lbs). You think I should isolate the core with some perlite/vermiculite? Cheers Don't bother, either build it with insulated material for the firebox or build a different design. It won't work with heavy brick in the flame path. Ah, I finally found the answer to the question I was asking about the use of heavy versus insulating fire brick, thanks. I don't know how I missed this comment before! |
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Post by ivanka on Nov 17, 2017 3:07:48 GMT -8
What size chimney should one use? 6" or 8"? I will have a go at building one in my 40m2 straw&loam house in the Netherlands, with mass bench.
Chimney size is the only feature I can't find the info on and don't want to just guess.
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Post by matthewwalker on Nov 17, 2017 7:18:36 GMT -8
Ivanka, it is designed to use a standard 6"/1500mm chimney.
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Post by lightworker on Apr 22, 2019 18:53:07 GMT -8
Matt:
Thanks for your great work. I have been thinking about making your riser-less-core out of insulating fire brick. I have started to work with ceramic fiber board thanks to your work and am wondering if cfb and insulating fire brick could be combined,assuming all the same dimensions are adhered to?
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Post by matthewwalker on Apr 23, 2019 13:49:57 GMT -8
I think they are very similar in performance and I wouldn't hesitate to mix them in a core build. Keep the internal dimensions identical to the original core and it should work great.
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Post by nixsee on Dec 26, 2020 14:17:15 GMT -8
This is fantastic. However, I'm curious as to whether this can work without any sort of chimney - just the batchbox, cooktop and exhaust out to the side?
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Bram
New Member
Posts: 46 
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Post by Bram on Jul 31, 2022 2:23:03 GMT -8
In the late winter of this year I did a three year review of our Walker Riserless Core. I only managed to upload it just now and I decided to share it with you here: www.youtube.com/watch?v=A4z0u6-n4fU |
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