The original blower in use, the fan spins one way and then the other instead of continuously in one direction The string mechanism allows for a high rpm but not continuous rotation Cutting a rotor for the new fan Rotor cut to 75 cm long and debarked Cutting cane for the fan spokes Fan spokes 50 cm Splitting the spokes Lashing spokes to the rotor with cordage There are 3 pairs of spokes which will hold 6 blades.
The blades are folded leaf squares inserted into the spokes A log is split and lashed at one end The rotor is wedged into the split A nut shell It is added to the top of the rotor as a socket The rotor is spun with the log acting as a counter weight Wetting the socket helps the rotor spin better Making mud for the fan housing The stick that scribes the housing is marked with 4 points past the half way point.
4 points are marked in a cross, each one moving down the marks on the stick The points are then connected to form an increasing spiral or volute Mud is now added to form the walls of the housing The finished fan housing walls The fan must always spin anti clockwise in this housing for it to work Covering the housing with wood as a roof Plastering roof with mud Shaping the air entry Finding where the air entry/ lid boundary is.
Making the lid Taking off lid and inserting fan The fan is folded flat to fit in the opening Once inside, the fan can be folded into its original shape The fan blows wind over the grass a few meters away Making fire Blowing the tinder into flame with the blower Testing on the fire Making a tuyere or clay air pipe for the fire.
Fire drying the tuyere Installing the tuyere View from inside the blower Making a furnace 20 cm in diameter 20 cm internal diameter, 50 cm tall Roasting ore and making charcoal in the same process Taking out the roasted ore Taking out the charcoal 1 hour preheat with wood.
Filling with charcoal 1 handful of ore 3 double handfuls of charcoal one handful of ore Same again This new method is really unergonomic after a while and it takes longer to consume each charge than the original blower I only did 3 charges because it was tiring and it took about the same time as a 6 charge smelt with the original blower The bloom formed under the tuyere Only tiny iron prills formed in the slag, smaller than usual (pause video and look for silver specks).
Volute shaped blower
Author:Author Link:Youtube Link: https://www.youtube.com/watch?v=Csb-AFD58ww
Category:Channel Name: Primitive Technology Channel ID: 28
Tags:primitive,volute,shaped,primitive technology,primitive,technology,tech,primitive tech,technology primitive,tech primitive,prim technology,prim tech,tech prim,technology prim,building from scratch,build from scratch,design,smelting,smelting iron,wood fire,wood,charcoal fire,clay,volute,volute shaped,fire,fire blower,clay design,fire starter,hand cranked blower,forge,fire making,fire blowing,making a fire,wildnerness,handmade fire blower,building with sticks,clay tools,tool,
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