Wood Gassifier Stoves

**COWBOYSURVIVAL** · 03-08-2010, 08:10 PM

I stayed the weekend in the swamp and learned a few lessons. I paired down my gear from previous trips quite alot and plan to continue to do so. My biggest reason is that I want to make it easier to go. I searched here and over the net and learned a wood gassifier stove is probably what I am wanting to eliminate my gas stoves. I understand the principle of how they work well enough. Most I found were made from soup or coffee cans. Alot were paint cans with a perfect matching soup can for the burn chamber. I see mine getting a fair amount of use and came up with this idea. I am using a long narrow propane torch cylinder for my chamber and standard 1lb. camp cylinder for the body of the stove. The reason for this is I wanted something more durable. I don't mind welding as needed either. I plan to paint the entire assembly with grill paint when finished. If any of you have done anything close and learned any lessons I'd like to hear those lessons.

**crashdive123** · 03-08-2010, 08:24 PM

I have not done anything like it, but look forward to watching your progress with it. Cool project.

**Rick** · 03-08-2010, 08:38 PM

Here you go, CS:

http://www.motherearthnews.com/Renew.../Diagrams.aspx

http://www.motherearthnews.com/Green...-Vehicles.aspx

http://www.motherearthnews.com/Green...as-Update.aspx

http://www.motherearthnews.com/Green...our-Truck.aspx

**COWBOYSURVIVAL** · 03-08-2010, 08:41 PM

To cut the 2 cylinders in halves, I purged the empty cylinders by depressingg the release valves to ensure they were empty....some smell came out but no sss noise. I also knew they were empty from use. I then cut them with a cutoff wheel on an angle grinder. I in no way condone anyone else doing this. I am actually crazy and it could burn you real bad so don't do what I do!

**COWBOYSURVIVAL** · 03-08-2010, 08:50 PM

Rick,

The one I am designing is closest to number 5 in the link you attached below. Except that the gasses will be reinrotuduced straight to the burn chamber to maximize the efficiency of an otherwise basic hobo stove. This is supposed to significanty reduce boil time and save fuel. I am planning to use wood and charcoal but I have read where alchohol stoves can be placed in a gassifier and basically reburn the waste as well.

http://www.motherearthnews.com/Renew.../Diagrams.aspx

**Rick** · 03-08-2010, 10:24 PM

Do you plan to burn all the gas produced at any one time or will you have a valve to shut off the flow? I would think stopping the flow could increase the pressure.

**crashdive123** · 03-08-2010, 10:29 PM

I know it does for me after a big pot of beans.

**gryffynklm** · 03-08-2010, 10:56 PM

CS thanks for bringing the subject up again. This is a subject that fascinates me. Rick, I didn't have some of those links. Thanks.

**COWBOYSURVIVAL** · 03-08-2010, 10:57 PM

Originally Posted by Rick

Do you plan to burn all the gas produced at any one time or will you have a valve to shut off the flow? I would think stopping the flow could increase the pressure.

The gasses will be burned right away. This is a small stove....meant to boil water plus....a little more. I am pairing the two cylinders right now. Heck I am not far from done. I think you'll be impressed...seems like I saw you post on one during my search a few years back Rick. Same concept just heavier steel construction....Jarring your memoryz?

**rebel** · 03-08-2010, 11:09 PM

I'd like to see a picture of that there stove.

**crashdive123** · 03-08-2010, 11:34 PM

While I love the concept, and I think it's a cool idea that I'm looking forward to seeing you do - If'n you're just boiling water with a stove fueled by the gasses, and you have to have a fire to produce those gasses.........just sayin.

**Rick** · 03-08-2010, 11:38 PM

I have to confess I was shocked to see you take the grinder to that tank. I had a kerosene can in my hand once upon a time and it exploded. It ripped down the seam that happened to be away from me. All it I got was the sh@# scared out of me. I can't imagine what would have happened if that tank had ignited. You might try filling it with water next time.....just sayin'.

**COWBOYSURVIVAL** · 03-09-2010, 12:52 AM

I guess You'll just have to wait and see the finished product. (That way I save you all the nasties) I am confident it'll be a great bush stove. I wasn't gonna do a how to anyhow for the same reasons, but I know what I did and am doing and it is coming out excellent! More to come!

**Camp10** · 03-09-2010, 06:46 AM

Originally Posted by COWBOYSURVIVAL

. I in no way condone anyone else doing this. I am actually crazy and it could burn you real bad so don't do what I do!

Boy, if I had a dollar for everytime I said this....!! Lol! Cant wait to see the finished product.

**COWBOYSURVIVAL** · 03-09-2010, 08:01 PM

Here it is....It ain't finished and i don't have burn times and all YET! But I do have gasification and WOW this thing gets hot!

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Pictures of the actual gasification were tough to get. Not sure if you'll see it. I learned the whole stove gets really hot....even outside. I am going to make some baffles so as to be able to close off the holes as needed. I need to add holes at the bottom for air entry from outside the chamber, I just used a crack in my stump for this test burn. I am also gonna make the pot holder. Maybe a handle of some sort. I am really impressed with the energy released from such a small amount of wood. I'll post more as I go!

**rebel** · 03-09-2010, 09:03 PM

I'll try this again,

That's awesome! Thanks for the pics.

**COWBOYSURVIVAL** · 03-09-2010, 09:10 PM

Originally Posted by rebel

I'll try this again,

That's awesome! Thanks for the pics.

Thanks Rebel! I am just in awe right now at the heat it produced. When the wood burned down the vapors came in the bottom holes and just vaporized the coals till' nothin' was left! I am working on a pot stand and a pot now and will post burn times and boil times soon. By the way the outer camp propane can will nest perfectly in large white albacore tuna cans...I have one for the bottom and top! Really clean setup. I am gonna make the pot stand nest in the bottom of the chamber! Isn't real lite weight but it is small!

**Rick** · 03-09-2010, 11:15 PM

I have to admit, I'm a bit lost on this. What is generating the heat to gasify the wood?

**crashdive123** · 03-10-2010, 08:53 AM

I guess I'm a bit confused too. The wood gasification process is not unlike making char cloth or charcoal, but just channeling the resultant gasses to fuel what ever device you plan on fueling.

**COWBOYSURVIVAL** · 03-10-2010, 04:48 PM

Your right Crash gassification is producing gas by heating wood in a chamber. So heating wood produces gasses, therefore burning wood results in producing gasses as well right? The evidence was clear to me as the gases were burning out of the upper jets on my stove. As I tweak this thing I think I'll be able to get better pics. But you did help me out with an idea to try. As I said this thing gets really hot. I am thing if I place some wood in the bottom it may increase the available gases. I'll have to give it a go. Crash also if you wanna try a simple one just to see it work a vegetable can will fit perfectly into the mouth of a paint can leaving only a few holes to drilled. Here is a link that may help you guys see "how it works".

http://www.jureystudio.com/pennystove/pennywood.html

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