• 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

How critical is ?  RSS feed

 
Posts: 5
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Hello and good day to you all.
Having recently completed a rocket mass heater to to specifications of "the Bonny" plans by Ernie,i realise that a bigger (larger diameter) fire feeder tube is needed for the purposes i require. Although the b"bonny" uses a 8 inch tube system,i have had to use 140mm tubing (+/-) 6 inches diameter some the fire feed tube is the same. My question is ,what is the maximum diameter to which i can increase the diameter of the fire feed vertical tube? If anyone has done this type of adaptation ,or knows the dynamics of this ,i would sure appreciate your input before i go cutting my stove about..
 
Posts: 33
Location: Dubuque, ia
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Martin, this book gives all the critical measurements. http://www.rocketstoves.com/
Have a Great day. Jay
 
pollinator
Posts: 4154
Location: Northern New York Zone4-5 the OUTER 'RONDACs percip 36''
59
books fungi hugelkultur solar wofati woodworking
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Martin Jackson : I second Jay's suggestion, ernie and erica Wisner have to assume you have done your homework when you buy their plans, an 8 inch system
should be 8'' Inside diameter everywhere, to give you the Constant Cross Sectional Areas through out your build, ''The Book" Jay is referring to contains the
simple instructions to Allow you to figure this C.C.S.A. out for yourself.

There is also help with understanding the Ratios of Depth of Feed tube, to Length of Burn Tunnel, and Height of the Heat Riser!

Rocket Mass Heaters, 'The Book', mentioned here is also a valuable source for quickly learning the vocabulary of our little craft, making sure that when a
Fellow Member comes here with a question or comment on an observation, that he is using the same words to describe the same Part/section, its size, shape, and
orientation to its self and other Parts/Sections ! The $18. cost of a PDF Copy of 'The Book' would have saved you from this basic mistake, saving you time, money
and frustration ! Once you have a more thorough grounding in the fundamentals, you can come here 24 / 7 and expect to find Help from your Fellow Members !

For the Craft! Think like Fire! Flow like Gas! Don't be the Marshmallow! As Always, Your Comments and Questions, are Solicited and Welcome! PYRO - Logically Big AL!
 
Martin Jackson
Posts: 5
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Thanks for the advice folks. Maybe i can get upto speed now ?
 
Squanch that. And squanch this tiny ad:
Binge on 17 Seasons of Permaculture Design Monkeys!
http://permaculture-design-course.com
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!