• Post Reply Bookmark Topic Watch Topic
  • New Topic

rocket grill not running right  RSS feed

 
Posts: 11
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Hey guys im having trouble getting my grill to burn right. Its acting like its starving for air. The chamber is a pipe lateral set at 45 degrees. Need help guys maybe a 90 instead of 45?
20140207_155903.jpg
[Thumbnail for 20140207_155903.jpg]
20140207_155857.jpg
[Thumbnail for 20140207_155857.jpg]
20140207_155851.jpg
[Thumbnail for 20140207_155851.jpg]
 
gardener
Posts: 2463
Location: Southern alps, on the French side of the french /italian border 5000ft high Southern alpine climate.
66
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
My advice,

It lacks insulation,

It won't be powerfull enough for being a barbecue.

Metal is doomed, and 45° rockets are finicky if i remember well.

Go for refractory clay flue pipes Batch rocket style.
 
Posts: 1645
Location: Cincinnati, Ohio,Price Hill 45205
24
forest garden trees urban
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
You have a piece of flat stock as your fuel shelf. Is the unseen end perforated to act as a grate?
I second the insulation suggestion as well.
Sure metal will die in a properly functioning rocket, but you might as well run it till then.
Maybe set the bottom into a drum of refractory/insulative material, so when the metal fails there is a backup.
 
austin harrelle
Posts: 11
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Ok so iim going to make it into a 90 degree. I have the other half of the tank left to the side so I can make a insulation dome. Ill fill it with perlite. Sound good? And yes the fuel plate is perforated. So this design to a conventional rocket but with a large cooking tank. I built one before but it was small. Ill post it on a new topic
CA20140207221249.png
[Thumbnail for CA20140207221249.png]
 
gardener
Posts: 318
Location: Buffalo, NY
29
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Insulation and 90 are good suggestions.

The other thing I noticed is that the grill opening is so large. You (will be) taking the fast moving air from the chimney in a small area and then dispersing it into a much larger area. It to me looks like an inverted nozzle, which slows fast moving air. You will probably have 1 good hot spot on the grill, but have a lot of cold area.

Shrinking the grill size (if possible) to smaller cook surface.
 
austin harrelle
Posts: 11
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I didnt think of a cone. I was just going to use a plate. Ill let you guys know how it will work out
 
austin harrelle
Posts: 11
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Ok guys heres where im at. The bottom where the 90 is im going to wrap with heat insulation and fill with lava rock
20140209_184554.jpg
[Thumbnail for 20140209_184554.jpg]
20140209_193253.jpg
[Thumbnail for 20140209_193253.jpg]
 
Satamax Antone
gardener
Posts: 2463
Location: Southern alps, on the French side of the french /italian border 5000ft high Southern alpine climate.
66
  • Likes 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Austin, i used lava rocks to spread the heat on the hoizontal batch box rocket barbie. I think i need several layers for it to spread the heat.

http://donkey32.proboards.com/thread/799/barbie-core-horiz

If the pics don't show, click on the blue link next to the little crosses.

The batch box is too large for the heat riser. And it smokes a lot before getting to temps. Works wonderfully as a plancha. As a barbie, not so well i need more lava rocks. I haven't tried the oven yet. Well, sort of. I tried boiling water on top, but it didn't even remove the paint, and water was just simmering. Too much radiating surface into that barrel cutoff.
 
austin harrelle
Posts: 11
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I could not view your pictures. But I did see your video. Tomorrow ill have the bottom welded on and the wheels as well. Then ill fire it up and snap some pics. I wrapped the 90 with high heat fiber insulation. And around it poured 1 cubic foot of red lava rock around the insulated 90. For the cover lid im going the cut two 3 inch holes as a exhaust. The two 3 should slow the flow but yet still allow the same amount of air to escape.
20140209_193253.jpg
[Thumbnail for 20140209_193253.jpg]
 
Satamax Antone
gardener
Posts: 2463
Location: Southern alps, on the French side of the french /italian border 5000ft high Southern alpine climate.
66
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
You might have to be registered to view the pics, tho, i didn't think so. You don't have a link in blue next to the disapeared pic cross?
 
austin harrelle
Posts: 11
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Hey guys I found some good sticks in the yard and guess what 600 degrees at the top of the grill!!! Its been holding 550 for 30 mins off of a arm full of sticks!! Hell yeah guys!
20140210_192238.jpg
[Thumbnail for 20140210_192238.jpg]
 
Satamax Antone
gardener
Posts: 2463
Location: Southern alps, on the French side of the french /italian border 5000ft high Southern alpine climate.
66
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
That's good enough for pizza.
 
austin harrelle
Posts: 11
  • Likes 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
ok guys Im finished with the grill heres the youtube link

https://www.youtube.com/watch?v=jye8d62lPXM&feature=youtube_gdata_player
20140223_174650_Richtone(HDR).jpg
[Thumbnail for 20140223_174650_Richtone(HDR).jpg]
 
Mother Tree
Posts: 10329
Location: Portugal
1052
bee bike books duck forest garden greening the desert solar tiny house wofati
  • Likes 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
 
It's a beautiful day in this neighborhood - Fred Rogers. Tiny ad:
2018 need a rental/event manager for great pay
https://permies.com/t/50293/permaculture-projects/rental-event-manager-great-pay
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!