burning chamber ideal dimensions?

Hi,

im building a Rocket Stove with a "L" shaped burning chamber?

can some help me with the dimensions? Are there "best dimensions" ?

it will be square or rectangular and made with firebricks..
is 15x15cm too big or is ok?

how long sould be the horizontal and the vertical ?

can the entrance be bigger than the exit ?

thanks Gabriel

15x15cm/30cm long, 60 tall.

Gabriel Guhr wrote:Hi,

im building a Rocket Stove with a "L" shaped burning chamber?

can some help me with the dimensions? Are there "best dimensions" ?

it will be square or rectangular and made with firebricks..
is 15x15cm too big or is ok?

how long sould be the horizontal and the vertical ?

can the entrance be bigger than the exit ?
thanks Gabriel

Nope!

Satamax Antone wrote:15x15cm/30cm long, 60 tall.

thanks for the info, if i want it not to be so tall the entrance must be smaller? the entrance and the exit must be the same size?

are there any formulas o ratios for the ideal dimension of the L and J Burning chambers of a rocket stove?

Gabriel Guhr wrote:are there any formulas o ratios for the ideal dimension of the L and J Burning chambers of a rocket stove?

there is a book that is suggested that has all the info you need to build a RMH. i can tell you i couldnt have built mine without it. it will keep you from making many mistakes.

Ratios for a J-tube core: 1:2:4 feed tube to burn tunnel to riser. It is common for the "1" base to be 1 1/2 to 2 times the system diameter. You can measure the lengths either along the centerline of the core, or along the outside edges.

In any case, it is best to make the core cross section squarish, and if not square, the height should be greater than the width. The cross section should not vary throughout the system, except at a couple of transition points where you want it larger so as not to restrict flow.

I don't think the L-tube is as exacting with regard to proportions, but I would stick with Max's ratio. You want enough length that most of the gases have time to combust before reaching the top of the riser, but not all (if you are planning to cook on it, which is the typical use for an L-tube). Testing mockups outdoors would be the best way for you to find out what will perform best in your situation.