Burra Maluca wrote:
Maybe a taller chimney to provide more 'suck' factor. I've never used one, but I spent far too long watching Paul's new video yesterday, and then a load of fluid dynamic videos, so my head is full images of air moving through things.
I think the key is to get the air moving as much as to get it hot, and it seems to me that the easiest adaptation to try is extending the chimney.
Ken Peavey wrote:
Not enough energy gain.
-Paint the entire thing with flat black paint.
-raise it off the ground
-insulate the device
-cap the vent until temperatures rise to the desired level
-add ducting, a dryer duct will work, paint it black, cut a hole near the bottom of the box to let the warmed air in.
-add mirrors to increase gain
-rebuild with more glass/plexiglass