Ken Gabehart

Thanks guys .... The weeping yes you are correct ...would insulating the pipe outside help that? It not a big issue. The lid over burn chamber is to control air flow and to keep heat in when fires out.cause of the large burn chamber and j tube so far all is working good. I was having a problem with the mass but found it to be the layers had air between and created a thermal barrier. I since removed clay and will take Gary's advise and use some rocks. I'm going to brick around fire box inside and out since clay can't handle it. Clay is locally harvested two different places second layer was different from first less sand.will post some pics when I get finished had to leave the homestead and go into the city for a few days for some work. I live way off grid

 so I did video and not sure if it worked.  i need to mix more sand In mix.  going to get fire brick from tractor  
supply and line inside of fire box and removing clay from around outside of fire box and using brick. I think my problem with the mass not heating up was I put clay in at two different times and first layer was hard when i put second layer down. I took second layer off there where air gaps between them.so not making full contact with mass.

Thank you for the reply and info I attached a video of what I got going on. Well I guess not I hit the attachments button "add another file " and nothing happens.

my first mass rocket stove here and it seems to work pretty good except for I can't quite understand why my bench don't heat up like I thought it would I mean it gets up to a hundred and ten degrees but if I build the mass any bigger cuz right now I only got one inch above my exhaust pipe if I put any more in there I don't get any heat out of it . I built the fire box out of metal which now I realize I probably should have went and did some firebrick but this is a new to me and I'm a metal guy so I tried metal.... learning curve. I used  an oxygen tank that it's 3/8 thick for my Riser tube on the inside 10 inch round ... Is that too big since I'm only using a 6in exhaust? I can insert  6in tube inside of that and then pack it with vermiculite to make it a six inch Riser tube and I'm wondering what a six inch Riser tube you better than the 10inch?  I have good draw  but all wood ignites and then fire starts  chugging like a train. About the mass the clay went in in layers and after it dried it seemed to insulate more then radiate.should I use Pete gravel ? Is straight clay not good ...it cracked really bad.not sure how to post pics took a while to figure how to post lol...