This was my second attempt as a small fan assisted wood burning stove, inspired by Risk's Forge http://www.imrisk.com/forge/forge.htm
Warning this little project may cause you to have to find somewhere to dispose of the contents of 2 beer cans
As it comes out of the 6" billy
It's actually about 0.25" too tall for the billy lid to close all the way down but the lid has a large enough lip that it doesn't cause a problem, it also still packs away inside the next size up, even when stored in the soot proof carrier bag.
Dimensions of the unit are 4" diameter by 5.25" from base to top of lid.
Taking the lid off the burner, packed inside I have the windshield/pot support, from a Green Heat base pack cooker, partly as it fitted so well http://www.simplyhike.co.uk/ProductDetails.aspx?StockID=9374
and a tealight balanced on a mini drinks can alcohol stove[1]
Dimensions of the burner box are ( approx ) 3" diameter by 1.75" high.
( Wind )Shields up
Taking the burner box out to show how the blower unit packs away.
Bottom left is the lid with alcohol stove and windshield/potstand this can be used as a self cook unit as is, or replace the alcohol stove with hexy. To this end I've made a second windsheid/potstand based on the Green Heat one using metal from a beer can folded double for a bit more strength.
Top center of the picture is the fuel chamber itself, you can just make out the arrangement of ventilation holes.
Inside is the fan and blower tube inside that are the battery and wires
The Hoblow Stove assembled.
I've also used it in this configuration as a heating fire, watch out for flames being blown out the opening though, I'm planning to stick some flame arresting gauze over that hole at some point
And this config as a tealight lantern, which can dry wet wood in the burn chamber ready for morning ( or melt a container of snow I guess )
Close up of the burner box vents ( with white paper inside to help them show up )
Initailly it didn't have the small holes at the top but they do seem to help it burn cleaner, I might double them in future and see how that works.
Ready to start a cooking 2 course meal?
This accessory was an afterthought, but as it fits snuggly in the burner box cost and weis notin much ( its the end of a baked bean tin with a cross cut in it and the edges bent up ) but with the addition of a coton wool wick enables me to burn lamp oil and cookin oil in the burner box I figuered I didn't mind carrying the extra weight.
So there we have it, constrution was simple.
Drill some holes in the sides near the bottom of the burner box, I did the sides to stop as and stuff falling through to the bottom others may want to drill the bottom itself.
Get a sharp point and score a line from the end of a beer an blow tube onto the main container, cut this out with curved ended tin snips.
Open beer can and dispose of the contents in a way that seems fit to you, open top end wit tin opener leaving the rim on this keeps it quite strong and the inward curve at the top helps it locate in the main hole.
Push the empty beer can into main hole tight up aginst the oppersite wall and mark it were it first point sticks out the hole. This gives the size that will pack away neatly. Now take of the width of the computer fan and mark that around the circumferance. Cut off bottom off beer can, I used kitchen scissors to just under twice the length marked above. From bottom cut slots up to the original cirumferance mark, I used 4 or 5 cuts, and fold these strips inside the tube, giving a double thickness tube. Push tube onto fan and tape inplace with heat proof tape.
Your done apart from connecting up the battery and having to drink another can of beer to make a windshield/pot support. I hghily recomend the Green Heat one though as it's springy and strong but it's nice to have a second ( beer? )
Tips : Have a second battery connector with the ends taped up, this goes on the battery for storage and makes sure it doesn't short, plus is a feild replacable spare.
[1] Red Bull and ToastTopper( for flat bottom ) 8 jet holes around the outer rim, 8 jet holes around the inner rim, offset between the outer ones, 4 jet holes space about the diameter of a 10p piece. On filling the outer holes vent means meths can be poured direct into the centre and left to drain through leaving a few mls ( when it drains down to the level of the 4 inner hole ) to help prime.
Warning this little project may cause you to have to find somewhere to dispose of the contents of 2 beer cans
As it comes out of the 6" billy
It's actually about 0.25" too tall for the billy lid to close all the way down but the lid has a large enough lip that it doesn't cause a problem, it also still packs away inside the next size up, even when stored in the soot proof carrier bag.
Dimensions of the unit are 4" diameter by 5.25" from base to top of lid.
Taking the lid off the burner, packed inside I have the windshield/pot support, from a Green Heat base pack cooker, partly as it fitted so well http://www.simplyhike.co.uk/ProductDetails.aspx?StockID=9374
and a tealight balanced on a mini drinks can alcohol stove[1]
Dimensions of the burner box are ( approx ) 3" diameter by 1.75" high.
( Wind )Shields up
Taking the burner box out to show how the blower unit packs away.
Bottom left is the lid with alcohol stove and windshield/potstand this can be used as a self cook unit as is, or replace the alcohol stove with hexy. To this end I've made a second windsheid/potstand based on the Green Heat one using metal from a beer can folded double for a bit more strength.
Top center of the picture is the fuel chamber itself, you can just make out the arrangement of ventilation holes.
Inside is the fan and blower tube inside that are the battery and wires
The Hoblow Stove assembled.
I've also used it in this configuration as a heating fire, watch out for flames being blown out the opening though, I'm planning to stick some flame arresting gauze over that hole at some point
And this config as a tealight lantern, which can dry wet wood in the burn chamber ready for morning ( or melt a container of snow I guess )
Close up of the burner box vents ( with white paper inside to help them show up )
Initailly it didn't have the small holes at the top but they do seem to help it burn cleaner, I might double them in future and see how that works.
Ready to start a cooking 2 course meal?
This accessory was an afterthought, but as it fits snuggly in the burner box cost and weis notin much ( its the end of a baked bean tin with a cross cut in it and the edges bent up ) but with the addition of a coton wool wick enables me to burn lamp oil and cookin oil in the burner box I figuered I didn't mind carrying the extra weight.
So there we have it, constrution was simple.
Drill some holes in the sides near the bottom of the burner box, I did the sides to stop as and stuff falling through to the bottom others may want to drill the bottom itself.
Get a sharp point and score a line from the end of a beer an blow tube onto the main container, cut this out with curved ended tin snips.
Open beer can and dispose of the contents in a way that seems fit to you, open top end wit tin opener leaving the rim on this keeps it quite strong and the inward curve at the top helps it locate in the main hole.
Push the empty beer can into main hole tight up aginst the oppersite wall and mark it were it first point sticks out the hole. This gives the size that will pack away neatly. Now take of the width of the computer fan and mark that around the circumferance. Cut off bottom off beer can, I used kitchen scissors to just under twice the length marked above. From bottom cut slots up to the original cirumferance mark, I used 4 or 5 cuts, and fold these strips inside the tube, giving a double thickness tube. Push tube onto fan and tape inplace with heat proof tape.
Your done apart from connecting up the battery and having to drink another can of beer to make a windshield/pot support. I hghily recomend the Green Heat one though as it's springy and strong but it's nice to have a second ( beer? )
Tips : Have a second battery connector with the ends taped up, this goes on the battery for storage and makes sure it doesn't short, plus is a feild replacable spare.
[1] Red Bull and ToastTopper( for flat bottom ) 8 jet holes around the outer rim, 8 jet holes around the inner rim, offset between the outer ones, 4 jet holes space about the diameter of a 10p piece. On filling the outer holes vent means meths can be poured direct into the centre and left to drain through leaving a few mls ( when it drains down to the level of the 4 inner hole ) to help prime.
