Byron Campbell wrote:By design the basic L-tube configuration burns dirtier than the J-tube rocket,
Ole Blente wrote:Hello John.
Thank you for the compliment First lady wanted these weak colors; I defnetely would have wanted some more contrast.
So you think too, like Peter, that the draft is too weak? The "horrible" 90 degree
transition on top of the riser adds to this. How would you messure the bad draft?
The riser is made of prefabricated chimney elements of chamotte. They are app. 15 mm thick. The space between the riser and the surrounding box is filled with leca/blähton. I had hoped this would give high enough burntemperature. But you indicate, that a low temp could contribute to bad combustion?
Satamax Antone wrote:The downdraft bell, or it could be called plenum is just to send the gases back down, from the top of a tall heat riser, to the tube you already have. I don't like pipe transitions. Too much friction opposing the flow of gases.
Ole Blente wrote:From your calculations I can see, that with an effektive heatriser mesuring 60cm, the diameter should be reduced to 9cm. Did I get that right?
Glenn Herbert wrote:To be specific, for a 15cm system, the batch box interior would be 216mm wide x 324mm high x 432mm deep. The port would be 54mm wide x 238mm high, or a slightly different shape of the same cross section. I presume these are the numbers you are working with.