Miles Flansburg wrote:Thanks Satamax, I really have no idea about it being better or not , just seems like a cool idea.
Do you know of any other videos that show a better one?
Hi Miles, i'm affraid i don't
His construction is quite nice. But that center chimney is plain wrong.
pizza ovens have a low door, with the chimney above that door. Making it bell'ish. And the fire happening inside the oven. They reach 400c° usualy.
What i have drawn above, is a mixture between a pocket rocket and a pizza oven. Basicaly you have the usual pocket rocket feed tube going about 2 inches from the oven floor, made out of refractory stones. And i did a mistake, the insulated heat riser should go down nearly as much, to give a proper bell effect. I think this way it could work properly. Fire the oven door closed for a while. This, unlike a real pizza oven, can't function with the door open.
Another option would be to use a batch rocket below.
Well, imagine it to be a cut drawing. But the door would be facing us. The door shouldn't be too low, since you need to throw pizzas in.
Miles Flansburg wrote:So where is the door on the drawing? Under the stack to the right or on the front as if we are looking into the door?
And the door would be very short?
I imagine lighting a piece of paper or two under the heat riser. Then close the door. Then light the sticks, and let it heat a bit. I think the functioning wouldn't be too far from a pizza oven. Exept that it is less smokey. May be burns a smidge less wood. Door should be hinged to be able to be oppened and closed quickly. To stop smokeback. But that still leaves the problem of moving the pizza inside to cook it well on all sides! Making pizzas with a wood oven has been my job for a while, in the past.
Miles Flansburg wrote:Howdy Terry, welcome to permies!
Here is my favorite video of a rocket pizza oven design. Maybe it will help?
Also do you have any pictures of yours?
thank you, i've watched those two vids a couple of times, somewhat the same approach, though my thermal mass is probably 1/3 or 1/2 of that, going more for insulation with only 1 inch of hard heat storing mass, the other 3 inches are insulative concrete. I reckon that with a good rocket, the thermal mass doesn't need to be too high, particularly with good insulation.
and about halfway up the riser, will be the input for the saw dust feed. I already have a low speed motor to turn an auger to feed the sawdust into the rocket, and if i choose i can block off that entry. I can also adjust the speed of the saw dust feed motor, but only by about 50%. I can get the motor to turn as slow as 20rpm. So, what do you guys think of this? Oh yeah, and i have some questions on the burn section, the horizontal part. Should i make a venturi tube, then expand it gently before the riser, or just keep it straight? I'm casting this in 2 pieces, use a bunch of sand, cover with crappy vent tubing, then plaster over that so i can later add contours to the burn tube, riser, such as the venturi section, ash scoops, slight wings in the risers to help the vortex spin.