• Post Reply Bookmark Topic Watch Topic
  • New Topic
permaculture forums growies critters building homesteading energy monies kitchen purity ungarbage community wilderness fiber arts art permaculture artisans regional education skip experiences global resources cider press projects digital market permies.com private forums all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • Anne Miller
  • Nicole Alderman
  • r ranson
  • Pearl Sutton
  • Mike Haasl
  • paul wheaton
  • Joylynn Hardesty
  • Dave Burton
  • Joseph Lofthouse
master gardeners:
  • jordan barton
  • Greg Martin
  • Carla Burke
  • Ash Jackson
  • Kate Downham

hookway style rocket stove charcoal retort

Posts: 5
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
So I have been doing lots of research on rocket stoves and mass heaters and I would like to start off with something basic and cheap, but useful. I would like to build a hookway style charcoal retort. Fore those that dont know this design, it is a kind of wood gasifier, rocket stove, retort hybrid.


However, I would like to make some changes to the design to reduce cost and to learn basic rocket stove building principals to apply to bigger mass heater projects.

The biggest issue with this design I believe is the use of a metal heat riser. I have been trying to figure out a way to replace it with a cheap casted refractory riser. Its difficult, as you don't want the riser to be insulated as in a traditional rocket stove since you want the heat to apply to the wood surrounding the riser, it is then insulated on the exterior or the wood chamber. what would be the best way to cast a similar design out of refractories? Could I simply use steel but coat the interior with sodium silicate? Could I cast one out of portland cement and coat with sodium silicate? any suggestions and insights are much welcome and appreciated.

Posts: 421
Location: North central Ontario
kids dog books chicken earthworks cooking solar wood heat woodworking homestead
  • Likes 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Do you have your heart set on a Hookway? They are nice but are complex I find and prone to the centre chimney receiving extreme heat stress. I prefer making my char in a tlud type kiln or my wood stove.
Gary Gilmore's Keystone is a nice simple build not as prone to metal breakdown due to extreme heat.

Here is a pellet based unit a little more refined but I prefer wood chip or wood pieces based units:

Cheers,  David
Joshua Peirce
Posts: 5
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Cool thanks for the info. I'll do some reading after work today!
Rocket Mass Heater Plans: Annex 6" L-shaped Bench by Ernie and Erica
will be released to subscribers in: soon!
    Bookmark Topic Watch Topic
  • New Topic