Got started on welding, then it rained, then it finally stopped raining, and I almost have the air jacket buttoned up. Got too dark for my eyes. Personally I think the air supply is the hardest part besides stitching two barrels together.
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I think were not supose too post pics of WK design on the free side of the forum, unless rules have changed, The internal design features are actualy supose too posted on preaium side -I THINK.?
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It’s not a WK design Kevin, it’s a Joni design. I understand the concern though. This is all some thin thin material with long nozzles meant to keep the heat away.
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The Joni gasifiers depend more on the velocity of the air than the heat, I’m actually just going to have fresh air go into this jacket to keep it cool.
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OK Thanks, I was just checking if you were aware of that, Is this a wood gas unit, similar too imbert, I noticed it was a bit short for a WK design. I made my last buen tube for the dakota 1 1/2" ceramic fiber between two water heater skins, and then put a layer of 20 gauge ss over the tje water heater skin, I gess i will find out how long the inside burn tube skins holds up.
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Joni’s design is a little bit Imbert because it uses higher velocity air but it has a lot of Soviet influence as well from what he’s said if I recall correctly. He referenced an engineer named Ryibnikov.
Joni’s air jacket is a lot smaller, but he also made his entire unit out of Stainless sheet metal and rolled it himself. I’m using dimensions he put on the Forum and using materials I have on hand. I scaled up nozzle and restriction size for the 4.3L because Joni has a 1.8L 4 cylinder for his gasifier to feed.
There’s a couple eyeball similarities to a WK and a Joni, but they just look a little similar. Joni doesn’t use a heat exchanger or anything like that, just gasifier, cooler, and filter.
As far as I know, nobody else is working on a Joni design in the US besides my poor attempt at it. SteveU has been interested in it because Joni’s designs are really lightweight and aren’t sensitive to fuel size.
Joni insulated the lower half, and he told me it isn’t for heat retention but is actually to prevent accidentally burning yourself or someone if they touched the lower half.
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I insulated around the outside of my burn tube allso, plus it will keep the excessive heat from ditorting bottom half, I was going too coat my ceramic blanket with hardening paiste. but ran out of money too spend on unknown mixes of ceramic hardeners. I should have made my air tubes longer, so i could have added a 1/4" plate under the tubes for more heat resistance.
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Joni insulated the whole bottom barrel and put a sheet metal skin over it. But yeah it seems like everybody insulates their burn tubes or hearths.
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I had a insulated burn tube in my s10 4.3 and it seems too work tar free with just cyclone and hay filter, /cooling rack with no sticky thjrotle plates anyway, though i had a nice big charbed burn tube. I am saving that unit too run a generator when time prevails.
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Got my air jacket done minus the air entrance pipe, and of course it immediately wanted to downpour as soon as I was done. Stuck in the shop with poor Polly dog. It’s raining big fat stinging drops right now.
We actually get more rainfall than Seattle, Charlotte averages 43 inches a year.
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Wow, so you are wearing rubber boots most of the time like Steve U., Mike G. , and Marcus on the west side of the mountains.
Bob
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I keep boots handy also .
Alabama 56 inches per year
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Oh yeah when I’m working outside I’ve got my waterproof Wolverines. I’m clumsy so the steel toes are a bonus.
If it’s been raining for days I’ll put on my Dunlops.
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The only Dunlop’s I know of is those that Dunlopped over the belt. 
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I was surprised when I saw that Dunlop made boots. Wonder if it’s recycled tires 
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I really like the radiator hose option. I know on dads truck i can crawl all over his rails…steping on them is no problem. The fernco and silicone couplers are too soft for that…
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Cody , i am waiting with baited breath to hear if your cross downdraft has reviled its ugly side to you yet , have you managed to install it on the Mazda yet ? or tried a bench test on the sierra yet , you now seem to be talking about the Joni build your doing i cant keep up with your building schedule . 
Dave
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In between the rain and people needing my help I haven’t been able to get much done other than some fuel prepping and buying materials to build the flat bed for the Mazda.
I know after talking to one of the Master Technicians at work that the injectors on the Sierra have a very wimpy injector pump and refuse to open at anything lower than 50psi. I honestly think the Sierra was chewing on char gas when I would shut off the fuel pump.
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He’s still a young man Dave. Enough energy to power a small city. I remember how that felt. It was good.
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I’m thinking about listening to Kristijan, Bobmac and other’s suggestions and cutting out a plate with a 10" restriction to make the glow zone concentrate more to the center and maybe crack more moisture. Maybe even blend in some wood.
What I like about how I’ve built the Diagonal Draft, is I can convert it to a lot of formats. I could even put in a ring of nozzles or a double flute like how Kristijan has done.
Or maybe a Gragas, the less ideal uninsulated single downdraft for charcoal.
I think I overestimated the flow of the 4.3 and put the diagonal nozzle a little too far away from the gas exit to work as it’s actually intended. With Crossdraft types that distance is very key.
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