Forums:

Build a Second J-Tube RMH - PEP BB rocket.wood.jtubermh

BB rocket - wood badge

posted 5 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

This is a badge bit (BB) that is part of the PEP curriculum. Completing this BB is part of getting the wood badge in Rocket.

This BB requires you to build another J-Tube Rocket Mass Heater that is different from the one you built for your straw badge.

(cource)

These are some potentially useful resources:
- The Rocket Mass Heater Builder's Guide by Erica and Ernie Wisner
- Top Questions About Rocket Mass Heaters
- New Build - Need Help
- Building My First RMH (Tommy's Tea Dome)
- Farm House RMH, First In House Build

This is a potentially helpful video on building a RMH.

Rocket Mass Heater Full Build (time lapse)

From the video description:
"So I decided to go back thru and use all the High speed video footage and compile a video, speed it up a bit (was over an hour) and give you the build One time through. Thanks For watching."

To get certified for this Badge Bit you must provide:
- pic of area before build
- pic of core (exterior of burn tunnel, heat riser and manifold) without barrel
- pic of ducts or stratification chamber before mass
- 3 pics of manifold
- pic of completed product
- pic of vertical exhaust going into the ceiling
- pic of vertical exhaust coming out of the roof
- 2 minute video of starting the fire and proving there are no smoke leaks

COMMENTS:

Alexandra Malecki

gardener

Posts: 567

Location: 6a; BSk; Suburbia; 0.35 acres

236

I like...

posted 20 hours ago

Number of slices to send:

Optional 'thank-you' note:

Send

Approved submission

I built a second 8" J-tube RMH this time with a 6" exhaust. For this experiment, I used a cattail mortar mix to stack the firebrick, used firebrick and perlite+cattail mortar mix for the riser, and made the bench smaller due to space limitations. I offset the riser and asymmetrically insulated the riser to direct radiant heat optimally into the space. I also included a p-channel, version 2 ash scoop, feed cover, and integrated kindling holder and handle into the cold start cap.

The radiator barrel is a functional cleanout and the end of the double barrel bench is also a functional cleanout. This system is very easy to maintain and works very well; no visible smoke out the chimney <5mins.

Here's my video of starting the rocket:

1_area-before-build.jpg

2_core.JPG

2_insulated-riser.JPG

2_manifold.JPG

3_strat-chamber-before-mass.JPG

4_manifold-pic-1.JPG

4_manifold-pic-2.JPG

4_manifold-pic-3.jpg

5_completed-product-and-accessories.jpg

6_exhaust-into-the-ceiling.jpg

7_exhaust-coming-out-of-the-roof.JPG

I'm pursuing SKIP to inherit property, check it out for yourself: SKIP book or maybe you're my Otis/Otessa match?
I created a thread dedicated to my countdown to PEP2, please come visit and ask a question!
I love that Rocket Mass Heaters are Carbon-Nuetral. In Erica's and Ernies Art of Fire Presentation, Erica explains the chemistry of how that's possible!
I attended Helen's Garden Master Course in January 2022 and give the lectures 10/10 acorns! Fortunately for you, you can also see the Garden Master recordings but unfortunately you'll miss out on the fruit Helen grew and shared. It was the tastiest fruit I've ever had!

Staff note (gir bot) :

Jeremy VanGelder approved this submission.
Note: Good job! It's great that their is one more RMH in the world.

I agree. Here's the link: http://stoves2.com