Dear Darren Actually I should have mentioned something before about the termination of the grate on the left (lower) end.
It really should extend farther under the combustion area. The grate will never really get covered by ash and char, so it lets air enter the gas stream at the bottom end (part of the secondary air not coming through the secondary air port I mentioned before). I like the angle shown. We made it movable perhaps 15-20 mm left-right by an external ring (which can be hooked and moved by a lot of convenient tools). The divider between the combustion chamber and the hopper will get really hot. There is a stove called the Kitchen King made in Pretoria that uses a similar secondary air entry method but places it as the hopper/fire divider, passing the air into the gas stream as it goes under the divider. The advantage is that the part gets really hot but remains an 'air cooled' part = longer life. Put a controller on the secondary air (inlet on the body) as it may need far less than you imagine. Remember you are after an excess air level of <100% at full power - it is not all that much air. Oh, yeah, what is your chimney height? Regards Crispin +++++++++ I've got wed, thurs, fri, booked in with my blacksmith friend. We have a lot of 3mm steel sheet we salvaged also some bits of 6mm and some which is probably about 10mm. I want to keep the weight down but also want it to last. Other than the throat area will 3mm plate do the job or do I want to be using something thicker for the combustion area? The area by the heat exchanger? Best Darren _______________________________________________ Stoves mailing list to Send a Message to the list, use the email address Stoves mailing list to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org for more Biomass Cooking Stoves, News and Information see our web site: http://www.bioenergylists.org/ [email protected] http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
