• Post Reply Bookmark Topic Watch Topic
  • New Topic
permaculture forums growies critters building homesteading energy monies living kitchen purity ungarbage community wilderness fiber arts art permaculture artisans regional education experiences global resources the cider press projects digital market permies.com all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • Nicole Alderman
  • raven ranson
  • paul wheaton
  • Jocelyn Campbell
  • Julia Winter
stewards:
  • Burra Maluca
  • Devaka Cooray
  • Bill Erickson
garden masters:
  • Joylynn Hardesty
  • Bryant RedHawk
  • Mike Jay
gardeners:
  • Joseph Lofthouse
  • Dan Boone
  • Daron Williams

Longer burn tunnel  RSS feed

 
Posts: 8
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Hi. Been researching for a good.. 10 mins and can’t find an answer. I know I should just read that book, but don’t want to buy any more stuff till I start expiramenting.

If I wanted a longer burn tunnel (aesthetic, ease of use [if my barrel is set back somewhere harder to get to idk?], wanting to sit on burn tunnel). Whatever the reason. What would need to change? At inovators event dvd, Earnie talked about theoretically lengthening burn tunnel with “fins” and said something about shortning riser.

Ive read people saying a longer riser? Can burn chamber be too long? Can there be a bend in burn chamber? Would a longer tunnel burn hotter? Without getting into equations, does anyone have any thoughts on this, or has tried it.

I just haven’t seen many people changing that part of the design much.
 
gardener
Posts: 1289
Location: latitude 47 N.W. montana zone 6A
115
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Yes Ted ;  I tried it.... didn't work out well at all.  Seemed to work ok until mid winter when it just wasn't burning like it had been ... A quick check at the ash pit showed me the problem.....  My entire ash pit and over 1/2 of my horizontal pipe was full of ash!!! Yup , A mid winter rebuild of the core took place that year .... I think I went from a 16" burn tunnel back to a 12" .. MUCH better .....Bless COB ,  crumble it up, get it wet and reuse it ! 
 
Ted Brown
Posts: 8
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Thanks so much. So interesting. I’ll stick with the old standard then.
 
On top of spaghetti all covered in cheese, there was this tiny ad:
five days of natural building (wofati and cob) and rocket cooktop oct 8-12, 2018
https://permies.com/t/92034/permaculture-projects/days-natural-building-wofati-cob
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!