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rocket mass heaters

Uncle Mud's Bun Warmer

paul wheaton

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posted 7 years ago

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I suppose that technically, this is not a rocket mass heater because there is no mass.

The idea of this is to replace matt walker's ring of fire which turned out to not be weather resistant.

The key to this is that folks can sit in a circle and have their butts warmed. The mission is to be able to warm butts within five minutes.

Under construction!

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Miles Flansburg

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posted 7 years ago

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So will folks be sitting right on the barrels or will it be covered with something?

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paul wheaton

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posted 7 years ago

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A bunch of us sat on the barrels. About 85 degrees F.

We talked about something to put over it. Cob was mentioned. But the thing about cob is that it will make it take longer until the warmth gets to your butt. And then it will continue to be warm long after you have walked away - with nobody appreciating the warmth. Mud thought it might be best to leave the metal exposed although we did talk about some potential coverings. I suspect it might be years until it is covered with anything.

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Chris McClellan

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posted 6 years ago

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Miles, we designed the bun warmer for instant gratification so you sit directly on the barrels and they warm you quickly. The mass is your ass.
--Mud

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Chris McClellan

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posted 4 years ago

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I just saw the bun warmer had to be moved to fix the berm shed. did it survive in one piece so we can put it back later? The berm shed is looking mighty good.

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paul wheaton

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posted 4 years ago

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It has been preserved!

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Orin Raichart

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posted 4 years ago

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Chris McClellan wrote:I just saw the bun warmer had to be moved to fix the berm shed. did it survive in one piece so we can put it back later? The berm shed is looking mighty good.

We moved it back into the berm shed...the bays now are to small for it to fit into one berm stall....there are also angle posts in the back of each berm stall.....so we threaded the barrels through one of the angle posts; it now occupies the second to last and last stall of the berm shed

....the barrels did separate at the joints a little so we'll have to fit them back together ...and we'll have to move the rocket stove which feeds it.

I'll post a pic so you can get an idea

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D.R. Smith

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posted 4 years ago

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Was the idea of using full barrels simply to forgo the need to cut them in half or was there more to it? How many barrels did you end up using, including the combustion upright? Were you able to sit on the end at the beginning of the run?

Orin Raichart

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posted 4 years ago

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Chris McClellan wrote:I just saw the bun warmer had to be moved to fix the berm shed. did it survive in one piece so we can put it back later? The berm shed is looking mighty good.

Here's where the butt warmer is now ....the vid might also give you an idea of needs to be done....the barrels did separate as I mentioned earlier (the vid doesn't show the separation).

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Chris McClellan

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posted 4 years ago

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D.R. Smith, it was about 10 barrels. We used whole barrels to seal in the exhaust as best possible and give more height inside the system to allow for the hottest gasses to rise up and warm our buns and the coolest gasses to sink and get sucked out the exhaust. Here's another video from when we built it.

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Chris McClellan

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posted 4 years ago

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She's Back!

You can follow my latest adventures at
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https://permies.com/u/164246/Chris-McClellan
Buy my stuff at https://unclemud.com/store/

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