Ok, Crispin, and Alex: But was the hopper lid really air tight? In tests we tried several years ago and with a friend in California, any air leak what-so-ever was a recipe for what you described. When we made it really air tight (using a screw thread cp or at minimum a turret locking one either accompanied by a gasket), it seemed to work well. Seems that alternatively, one needs some equivalent of a water trap at the base of the feed tube. Hmm: Any handy liquid or for that matter fine low density, readily available granular solid put in the bottom of J tube, down around and up- thru which, the fuel passes, that is not going to soak into the chips or pellets or mini sausage briquettes yet will prevent back flow of gasses air tight lid ?
Richard in the NW of the US part of the Americas ================ _______________________________________________ Stoves mailing list to Send a Message to the list, use the email address [email protected] 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/
