lawry
Junior Member
Posts: 113 
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Post by lawry on Jan 7, 2016 4:26:55 GMT -8
Hi all I've been lurking around the site learning as much as I can. I thoroughly enjoy rummaging through all the VERY useful information. My interests lie in the cooking stoves. Many thanks to all the experts/advisors on the site for the willingness to impart their knowledge. I hope to add to the site too in future but in the meantime I will be asking questions  ? Before discovering this site I built a two plate stove.  It worked well. Then I built this one with four plates...  which I changed to a batchbox after discovering donkey's post where PvdB went all out and did mods and testing. Thanks to you PvdB and Donkey. But I built the batch box before I saw PvdB calculator...  I am currently correcting my firebox dimensions as per the calculator. I am trying out ideas as I go and I will also share as I progress. |
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Post by esbjornaneer on Jan 7, 2016 7:04:06 GMT -8
Welcome Lawry, I am quite new too. Please would you advice how great a temp difference you are experiencing and how your flue gasses/flames pass your 4 cooking plates. (This part of the comment is talking about my build: I am not getting too much of a difference in temps along my one piece cast iron hob, as far as I can tell from how fast water boils. And I am getting flames licking the whole bottom of it) |
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Post by peterberg on Jan 7, 2016 9:50:18 GMT -8
But I built the batch box before I saw PvdB calculator... Hi Lawry, welcome to the boards. You aren't the first one to claim that he built this heater core before it was published and you won't be the last as well. The original idea by Lasse Holmes dates back from 2010 and was encouraged by experiments I conducted from 2007 through to 2012. And I was building on the experience I gained due to meddling with masonry contraflow heaters as long ago as 1984. But those are largely moot points, everything is already found out by someone on this planet. For example the rocket mass heater is a direct sibling of the Dakota fire pit, among others. Apparently, there's nothing new. But let's see what you are up to, maybe there's something to learn. |
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lawry
Junior Member
Posts: 113
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Post by lawry on Jan 7, 2016 10:05:10 GMT -8
Oh no no Peter you misunderstand me... I built the batchbox solely from your input on donkeys post. But I built it the wrong way because I had not seen your calculator at that time. So I used the wrong dimensions. Hence I am busy rebuilding now to your spec.
I am definitely not claiming anything.
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lawry
Junior Member
Posts: 113
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Post by lawry on Jan 7, 2016 10:40:23 GMT -8
Welcome Lawry, I am quite new too. Please would you advice how great a temp difference you are experiencing and how your flue gasses/flames pass your 4 cooking plates. When it was still a J Tube at the hottest plate (bottom left-above riser) I would get 136C, 2nd hottest (top left) 128C, bottom right 98C and coldest is top right 91C I will measure again once I rebuild the batchbox to the correct spec. |
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Post by peterberg on Jan 7, 2016 12:24:15 GMT -8
Sorry, Lawry, didn't mend to offend you.
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Post by satamax on Jan 8, 2016 1:21:22 GMT -8
But I built the batch box before I saw PvdB calculator... Hi Lawry, welcome to the boards. You aren't the first one to claim that he built this heater core before it was published and you won't be the last as well. The original idea by Lasse Holmes dates back from 2010 and was encouraged by experiments I conducted from 2007 through to 2012. And I was building on the experience I gained due to meddling with masonry contraflow heaters as long ago as 1984. But those are largely moot points, everything is already found out by someone on this planet. For example the rocket mass heater is a direct sibling of the Dakota fire pit, among others. Apparently, there's nothing new. But let's see what you are up to, maybe there's something to learn. Peter, that's intresting to read. I always thought it solely evolved on Donkey and Canyon build at the begining of this thread. donkey32.proboards.com/thread/511/adventures-horizontal-feed?page=1 and from your previous experience with massonry heaters. |
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Post by peterberg on Jan 8, 2016 1:55:55 GMT -8
Hi Max, All of the development isn't done by one individual, not even a couple of them. We are all getting ideas and build heaters while we are standing on each other's shoulders, methaphorically speaking. In a way, there's not much which is really new and most of the time it's invented in different locations simultaniously because the time is ripe for it. For more info about early development see Lasse's post of the 19th of May 2012. |
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lawry
Junior Member
Posts: 113
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Post by lawry on Jan 24, 2016 7:07:51 GMT -8
Please would you advice how great a temp difference you are experiencing and how your flue gasses/flames pass your 4 cooking plates. Hi esbjornaneer Here is the temperature profile of my cooktop as promised.  What temps do you get? Do you have any pictures of you stove. |
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Post by esbjornaneer on Jan 26, 2016 10:13:14 GMT -8
Hello Lawry, Thank you for your temps. My thread is available here. There is a Dropbox link in the first post with some pics, diagrams, calculations, etc. I am away from home again, but have a thermometer waiting for me when I get home. I'll take some more pics including temps when I get back. In the meantime I am dreaming about an outdoor cooking and eating area that I will start another thread for eventually. |
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docbb
Junior Member
Back from ZA
Posts: 92
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Post by docbb on Jan 31, 2016 5:24:38 GMT -8
But I built the batch box before I saw PvdB calculator... Hi Lawry, welcome to the boards. You aren't the first one to claim that he built this heater core before it was published and you won't be the last as well. The original idea by Lasse Holmes dates back from 2010 and was encouraged by experiments I conducted from 2007 through to 2012. And I was building on the experience I gained due to meddling with masonry contraflow heaters as long ago as 1984. But those are largely moot points, everything is already found out by someone on this planet. For example the rocket mass heater is a direct sibling of the Dakota fire pit, among others. Apparently, there's nothing new. But let's see what you are up to, maybe there's something to learn. 1686 Dalesme "fumivore"  Manuel du poêlier-fumisteGo to P 42 for further details and modifications  To burn all sorts of Wood in the middle of a Room without making any Smoak, is a thing so extraordinary, that all those that have heard speak of it, as well Philosophers as others, have asserted it impossible: but Mr. Dalesme Enginier, prosecuting his discoveries, has found out a Machine, which tho’ very little and portable, consumes all the Smoak of all sorts of Wood whatsoever, and that so, that the most curious eye can¬not discover it in the Room, nor the nicest Nose smell it, altho’ the Fire be perfectly open. This has given such satisfaction to all that have seen it, and to the King himself, that he has caused the Experiment to be made fever al times before Him.
This Engine is made after the manner represented in Fig. 1. and is composed of several hoops of hammer'd Iron of about 4 or 5 Inches diameter, which shut one into the other: It sands upright in the middle of the Room, upon a sort of Trevet made on purpose. A is the place where the Fire is made, where if you put little pieces of Wood, it will not make the least smoak, neither at A or B, over which you cannot hold your hand with¬in half a foot, there comes out so great a heat : If you take one of these pieces of Wood, out of the Fire at A, it smoaks presently, but ceases Immediately so soon as it is cast in the Fire again.
The most foetid things, as a Coal steept in Cats-piss, which stinks abominably when taken out of the Fire, notwithstanding in this Engine makes not the least ill scent. The same did Red-Herrings broiled thereon; on the other side all the perfumes are lost in it and Encense makes no smell at all, when burnt there¬in. We have since learnt that this is not shown, but when the Fire at A is well kindled, and the Tunnel B D very hot so that the Air that feeds the Fire cannot come that way but must all press in upon the open Fire; whereby the Smoak and Flame is all forced inwards, and must pass through the heap of burning Coals in the Furnace A, in which passage the parts thereof are so dispersed and refined, that they become inoffensive both to the Eye and Nose. |
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Post by Vortex on Jan 31, 2016 6:13:25 GMT -8
Wow, thanks for posting that, Doc. The illustrations at the end of the manual are very interesting. Guess there really is nothing new under the sun.
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Post by satamax on Jan 31, 2016 7:12:41 GMT -8
Nicee!
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Post by wiscojames on Jan 31, 2016 11:12:28 GMT -8
Fire going down and sideways in the 17th century! Love it.
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