To capture the heat from the J-Stove, a secondary stove pipe connects into a separate mass, the pipe then exits the mass and rejoins the main J-Stove stove pipe to flow out the chimney. This is the mass form I designed and made. It will warm to a few hundred degrees durning a 40 minute burn of the J-Stove and radiate heat for 8 to 12 hours.
The side vent of the stove fits into the hole pictured below- the mass form is upside down and will have a welded metal platform to align it with the side vent.
I’m letting it cure into next week. There has been some small shrinkage/settling that will need another round of pouring- I may use a fast setting concrete to make a stronger platform for the mass, then I will remove the form. If all that is successful, I’m going to cut it down in size quite a bit. This is designed as the ideal form to have at the ranch that can fit into the back of the pickup, but it is too heavy to move without at least two more strong guys and a bit much for a 500 mile trip in the back of the little pickup. I’ll remove the bench and bevel an angle into the body of the mass, dropping around 100lbs. If all that works out, it will travel up to the ranch sometime this fall for installation and testing.
I found this armoire for free, just a few blocks away. It had seem some hard use, but two days of Danger tinkering and she is ready to travel to the Montana ranch (she’ll nearly fill the bed of the truck).
Does this look like a free lawn mower? It looked and ran in the “free” category when I picked it up last weekend. No “before” picts (I thought it might just be a hopeful fail), and though it had belonged to an urban lady with a tiny yard, it looked like it had been used to cut fire breaks along stream beds, set low to the ground and run over rocks, winding the wettest tall grass, and binding it all on the deck with a spray of oil, then left in the Utah sun to bake it all in, with a bag full of whatever it ran over, turning the bag sickly pink and rust. And it ran rough and burned oil- but it ran.
I took the carburetor apart, cleaned and refitted it, snapping off a lead to the fuel petcock in the process and had to order one in. It arrived after a few days and I parted it out, changed the oil & spark plug and air filter, and put in non-ethanol gas. And I sharpened the blade and refitted it while the machine was empty of oil and gas. It fired right up, blew a last little cloud of smoke as it warmed up, then settled out and ran clean.
Now it just has to make the 530 mile jump to Montana.