Paul Tofflemire

Big Al I have cobbed in my pipe and put rocks around it is there a wrong way of doing this? I have the cob dry but I don't get a lot of heat from it the odd rock will get warm and the more I put on it the less heat I get. Should the cob be dry before the rocks are placed? The top of the barrel gets to 940F and after 2to3 hours the cob is only 120F Shouldn't it go to 300F

Big Al thankx for the feedback. I have another problem or question do you put cob all the way around the pipe or just on top of the rocks? Another thing I'm having trouble with is smoke back witch I don't really understand how it could do this. I have so much draft that I have to lite my stove with cardboard because if I use news paper the draft just takes it away. I do have the book from Ianto Evans an I haven't found a fix and it doesn't really say if you cover the pipe or just the rocks after you cover the pipe with rocks. I have found that covering the top of the burn tube a little helps a lot any other thoughts?

Amos Thanks for the input I can see where the increased draft will cool the bed off . I have covered the burn chamber after the fire is out but I think the cold air may still come down and cool the bed. I have an other problem my temp leaving the stack is over 140 F the pipe in my bed from the burn chamber to out side is 66 feet long. I am still in build mode and the pipe has no cob or stones on it yet. Should the bare pipe give off a good amount of heat when its burning the pipe is about 200F but doesn't seem to give off much heat. Is it possible I have to much draft? The top of my barrel gets red hot more the 930F that is as high as my temp gun goes. At the bottom of the barrel its about 520F. Shouldn't the pipe be hotter? My pipe is 8 inch and is straight for 50 feet than goes up 16 feet or so to the rotating cap. Where I live it is very flat and open and the wind gets up almost every day. Can anyone offer any ideas? This is my first rocket so any help would be great.

Big Al Thank you for the positive feed back . I have a problem with posting pics. and such. The real problem is I'm not so good with the computer . However I will gladly share the information on the cap I just need to know how to put a drawing on the forum. When I did the test with the burning paper there was little to no wind if the wind gets up will it be a problem?

Big Al yesterday I finised my chimney when I lit a peace of paper and put it in the tee 4 feet from the bottom of the stack it sucked it out on fire right out side on fire . Do I have to much draft ? The rocket is 50 feet from the stack. Is this normal?

John I was thinking of this because of I am going to have a 50 foot mass and was thinking it would improve my draft

maybe it will work this time

Here is the other picture it will turn 360 with the wind

Big Al here are some pictures of the cap I mentioned. What do you think? I have made them before for normal wood stoves and they word well.

I'm in a lot of commercial greenhouse operations in a week and they burn natural gas and exhaust it right into the house but only in short cycles. I think that not having a exhaust would quickly dis colour the plastic and lessen the light from the sun. Also when the droplets of water forms on the plastic it will rain that brown staining film down on your plants causing another issue to deal with.Not to mention the health to the people in the green house.