T Giles wrote:how tall is the top box compared to the firebox,
T Giles wrote:should the riser stub be flush with the top box back wall or should there be space,
T Giles wrote:and how large should the stumbler block be
T Giles wrote:Using the ratios on batchrocket.eu I have calculated the size that a box with a 2" riser would be. I havent heard of a box that small being attempted before, and Im curious if the drastic change in size will adversely affect efficiency.
T Giles wrote:the first and foremost tweak would be moving the port to the top of the firebox, rather than the rear, similar to the double shoebox design seen on peter van den berg's more recent videos. However, unlike the more square shape seen in his videos, I would like to retain the long(tall) narrow port that the original batch box design has.
T Giles wrote:can a vertical riser be used with a port that rests on the top of the firebox?
T Giles wrote:another design change I wish to implement would be moving the 45° angles from the bottom corners to the top corners of the box. I am unsure about whether those would extend all the way back in the firebox or stop just shy of where the port would begin.
Lukas Muller wrote:
Peter van den Berg wrote:...the chimney diameter..
Talking about chimney diameter, those chimney metal pipes I've seen selling online in my country are anywhere from 120mm to 200mm. So does the pipe's diameter has to be 180mm if the heat raiser's diameter is also 180mm or there's no connections whatsoever between any of heater's dimensions and the pipe diameter?
Lukas Muller wrote:One more question. Peter says regarding the relation of batchbox and bell size;
17.5 cm (7") ISA 7.2 m² (77.5 sq ft)
That would be, probably, one that would suite my needs. So ISA of 7.2m2 - that should be divided by 4(sides of the bell)? Or by 5 where the fifth surface would be the cover/"roof" of the bell?