Hi Jeff, you are coming along great on your Air Carbon Solar-Fuel Cell. Looking forward to seeing it run a engine. Solar-Fuel, onward! to your accomplishments on this project. It is a very important project. With no or very little welding being done.
Bob
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Fortran, wow, that struck a chord with me, Tom!
When I got out of the Seabees on 04Sep1970, I was back in class
at Clarkson to finish my graduation requirements starting 07Sep1970.
Those reqs, were 4 credit hours of computer programming in Fortran.
Well, Fortran 1 was only 3 credit hours. Darn!!! So, I took Fortran 1 and
Fortran 2 at the same time. No problem for this math nut! Aced them both.
Graduated with the class of 71, 11 years (fall 1960) after I started. Don’t ever
give up or listen to the loser nay sayers. You alone determine the
course of your life. My parents( whose sacrifices I finally realized and am eternally grateful for)
smiled from ear to ear along with a few tears, yeah, me too! It was one
of the proudest days of my life. Excuse me I have to dry my eyes!
I was the first one in both families to graduate college. Still am.
JUST DO IT!!!
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Must be a gas thing, I also took a Fortran class.
Thanks Bob, words like that help.
I’m 99% sure that the carbonized bread insulation will fail and here is the start of the failure. 
I’ll post the first recipe later. Put the dough in the bottom of the ACFC and tried to bake just below 400F. Hit 640F at first but started to understand the oven later in the bake. I will loose access to this oven soon and will need to build some kind of curing oven, assuming the experiments continue. Any oven builders out there? After 30 minutes it was removed. Needs more baking, will return later. It would be nice to weigh the dry ingredients before adding water. Next time. A weight on top of the dough might be helpful. Have not formulated a carbonize plan as of yet. As the bread dries it seem to shrink away from the pail wall.
Dough:
Closer view of the dough:
Bottom view of the bread in the oxidation zone:
Top view of the bread:
Interesting material to work with. Don’t mind the heat marks on the pail, that was me with a torch trying to burn off the labels and probing the pail coating.
Solar-Fuel, onward !
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Hi Jeff ,is this a version of the starlite insulation ? as i don’t think you need to bake the dough to make it work , in fact i had thought of maybe sprinkling the top with ash before the dough goes hard as a sort of protective coat .
Dave
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Hi Dave, it is a version of Post #210, above. Foam carbon scheme that I think is related to starlite. Yes, it will need surface protection. I can think of many more things to try than I will have time for!
Below is recipe version 02/07/2019:
#1.
Assemble your ingredients.
Qty. 6 cups of all-purpose white flour
warm water
Qty. 3 tsp. or 1 package active dry yeast
#2.
Activate the yeast. In a cup mix your yeast with about a 1/4 cup of warm warm (100-110˚F) water. Mix for a minute or two.
If you use “Rapid Rise” or self-activated yeast, you don’t have to activate the yeast before adding it to the flour. Skip this step and go to the next.
#3.
Mix the flour and yeast together thoroughly in a large mixing bowl. The bowl needs to be big enough to hold all your flour and water together at once. I used one hand to mix and another hand to add warm water. Not too wet, think molding sand or a tiny bit wetter. As soon as the bread starts coming together in the bowl, you should stop adding water.
#5.
I did the kneading in the bowl by hand only. I let the dough rest for about 20 minutes. It will produce small gas pockets in the dough. I think many small gas pockets are better than lesser larger gas pockets.
#6.
Step #5 was repeated.
#7.
Dough was placed and shaped in the ACFC.
#8.
ACFC with dough was baked in an oven.
Solar-Fuel, onward !
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Hi Jeff , thanks for pointing me upwards to the post , i now understand what it is you are trying for .
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Did some more baking and also wore out my welcome at this oven. 
The large diameter shrunk about a 1/4" on the radius or a bit less. The bottom small diameter also shrunk a slight amount. Now it is loose in the bottom of the ACFC. I think it will be much better to make this in two parts and in two molds and use a small oven that would be much easier to find. Even an electric small counter top oven and then the air could be blocked off so not to burn up the charred bread. Of course I am not too sure if a kitchen oven can reach high enough temperature to carbonize the bread.
After more baking…
Top looking into:
Bottom:
Here is a video on how I made the easy to rig snatch block for the machine that is half skidder and half forwarder. Easy to place rope over the pulley.
Pic.:
Video:
Solar-Fuel, onward !
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I think the skin should be removed from the bread to reduce surface cracking.
Some information below:
The paper that started bread carbon foam:
http://www.sciencemadness.org/talk/files.php?pid=465578&aid=54479
Burning Bread Creates Aerospace-Quality Carbon Foam:
interesting forum:
http://www.sciencemadness.org/talk/viewthread.php?tid=70570
Another discussion:
https://permies.com/t/57775/Carbon-Foam-refractory
Solar-Fuels, onward !
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Bruce, interesting stuff. I now have my own small oven. I plan on changing how I make the carbon bread foam. The last design has the carbon bread foam removed. The lower oxidation cylinder is removed and a larger hole for a larger diameter cylinder has been cut. This will allow for more insulation. This first bottom pail will be built with ceramic blanket, original plan. A second bottom pail will be assemble for carbon bread foam. This way the bread testing will not delay the new ACFC much.
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I learned what happens if the burrs are not removed when using back washers with rivets. Silly me. The middle rivet hole had the drill burrs removed.
The new enlarged oxidation zone.
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It is neat, it is just an ARM microcontroller chip like on the microbit and there are some ARM arduino compatible ones. The atmel/arduino is a microcontroller as well. It varies from the ARM chip in the raspberryPi because it has real-time clock like the arduino.(arm has IP for both microcontrollers and applications processors.) However, the Raspi, can be made into more real-time system with a RT kernel patches or with the quad cores, you just dedicate a core to the application you want. The rest of it is just the goodies they added with the exposed headers. For instance, you can get an i2c can-bus chip, or DAC /ADc for fairly cheap to add on. The software looks pretty neat as well.
It just isn’t what I think of as a PLC. 
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I do not like this toxic ceramic blanket any but it might buy me some time while working on the carbon foam. I bought a quart of the expensive rigidizer and applied it to the blanket. It becomes more fragile, I believe, then the carbon foam made from bread. Easy to put your finger through.
Bottom grate area:
Top, where fuel sets:
Opening is too large. Closing in with furnace cement:
Becoming a sheet metal junkie. I see myself joining the stainless steel gasifier group. A lot of sheet metal can be stored in a small area as compared to tanks. Surely there will still be a use for some old tanks.
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The cooler is stolen from the wood stove people. They call this design a bell or stratified flue gas heat exchanger. The idea is that the hot gas will rise to the top and as the walls of the cooler cools the gas this cooled gas will sink to the bottom.
Who needs plastic when you have sheet metal that will flow:
These conduit fittings make a nice connection, rather tight. The hole is flared with a ball pen hammer. Also add silicone sealant.
c
The cooler is just hanging from the loose pipe connection. That explains the tilt.:
No idea how well this cooler will work…
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Reading through Bob’s build I found a link that Garry, @taitgarry00, posted. Gives some hope for the stratified gas heat exchanger. Possibly, as the moist hot gas looses some of the moister to the walls of this thing this gas will be displaced to the bottom a long with water running down the sides.
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Giving a band seal a try. The pipe seams are a pain in the butt but for now that is all I have. Decided to order (later) a small 24" slip roll and go with stainless steel.
Hand joggling tool showed up. OK for small projects. This $25 tool looks identical as the $85 ones.
Hit the furnace cement with a propane torch and it got warts. Must still be moist behind the cement. I’ll have to try some kind of slow bake.
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Any body that can go into the woods with a chainsaw and a motorcycle and come out with lumber is all right in my book…
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Amazing video JeffD.
My go-too favorite saw IS a Stihl MS260Pro.
Very, very light and powerful for it’s size. But honestly a bit handles/motor mounts fragile.
This guy is real good to get that saw this versatile useable.
I learned much watching this.
“learn some every day to keep upright out of the ground putting one foot in front of the other”
Steve Unruh
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Jeff, thanks for sharing that YT video. Smart bloke! Refreshing delivery. I subscribed to his channel, and “rang the bell”.