03-29-2018, 11:19 AM
Projekt Thomas... 
A hollow edge can go deeper then wanted becuse it stands on two points, the cutting edge abd yhe baxk edge. A flat edge stands on the complete edge and pressed down it cannot go up or down in wood.
It is common in some wood working old cultures that have a singel edge knife becouse the flat side of the blade can be used as a plain along for example a log. The flat side stear the cutting edge to go straight forward, the edge-side press the flat side down against the logg.
When building logg houses you make locking corners. Each logg end in the corner are locked in place. There is many ways to make this lock. Some lock are simple, some are very advanced. The advanced are invented to stop drag (?) (stop unwanted air to come in to the house).
A normal size of fire are around 2,5 kilo wood burning. The heat from this size fire evaluate 500 Cubic meter of hit air ut from the room (house) together with the smoke,mthe evaluation can be thru a hole in the roof or thru a chimney. Only 5% of the stored energy innthe burning wood can be used for heating the room.
When 500 CM executed - 500 CM fresh air fromnthe outside sucks in to the room. We name this "drag" i think you guys say "draft"?
This draft is the reason that your backside is cold when you sit by a fire becouse the fire drags air in to it self. So, when building a log house, you get draft from the walls and corners. To stop this draft you use clay and Hey between the logs - and that is also possible to do in the corners - but muxh more difficult. That is why some houses are builders with airlocking corners.
A tepee works innthe same way - and its fire is also around 2,5 kilo burning wood. A tepee has two layer of huds, they have a inner wall that is adound 1-1,2 meters high. when the fire is burning it evaluate 500 CM hit air together with the smoke = a vacum is building up inside ghe tepee. Nature sont like vacum so nature allways fill vacum up with fresh air, in this case fromnthe outside - andryge fresh air drags in between the walls (cold air) and it "falls down" against the fireplace, over the head if the people sitting around the fire = they will not get cold backsides
I lived many years in a Sami kåta (Hogan) with open fire in the middle if the floor. A kåta works as a tepee with 500 CM air circulating - but we sit only in two sides of the fire. The third side have door and on the forth side is the kitchen (uppersit side from the door.
From the door there goes two logs to the fireplace, one on each side. On both aide if the door there is two holes for incomming frech air - and a third hole behind the kitchen. The cold outisde air flotes between the two logs to the fire,mthe third hole behind the kitchen hold the food cool and give the dire fresh air.
So, fire in rooms ans houses are a "ingine" that hild 500 CM circulating in the room/house. By steering the incomming air in different ways humans create warm places without any draft abd they have a comfortble home to live in
Thomas
A hollow edge can go deeper then wanted becuse it stands on two points, the cutting edge abd yhe baxk edge. A flat edge stands on the complete edge and pressed down it cannot go up or down in wood.
It is common in some wood working old cultures that have a singel edge knife becouse the flat side of the blade can be used as a plain along for example a log. The flat side stear the cutting edge to go straight forward, the edge-side press the flat side down against the logg.
When building logg houses you make locking corners. Each logg end in the corner are locked in place. There is many ways to make this lock. Some lock are simple, some are very advanced. The advanced are invented to stop drag (?) (stop unwanted air to come in to the house).
A normal size of fire are around 2,5 kilo wood burning. The heat from this size fire evaluate 500 Cubic meter of hit air ut from the room (house) together with the smoke,mthe evaluation can be thru a hole in the roof or thru a chimney. Only 5% of the stored energy innthe burning wood can be used for heating the room.
When 500 CM executed - 500 CM fresh air fromnthe outside sucks in to the room. We name this "drag" i think you guys say "draft"?
This draft is the reason that your backside is cold when you sit by a fire becouse the fire drags air in to it self. So, when building a log house, you get draft from the walls and corners. To stop this draft you use clay and Hey between the logs - and that is also possible to do in the corners - but muxh more difficult. That is why some houses are builders with airlocking corners.
A tepee works innthe same way - and its fire is also around 2,5 kilo burning wood. A tepee has two layer of huds, they have a inner wall that is adound 1-1,2 meters high. when the fire is burning it evaluate 500 CM hit air together with the smoke = a vacum is building up inside ghe tepee. Nature sont like vacum so nature allways fill vacum up with fresh air, in this case fromnthe outside - andryge fresh air drags in between the walls (cold air) and it "falls down" against the fireplace, over the head if the people sitting around the fire = they will not get cold backsides
I lived many years in a Sami kåta (Hogan) with open fire in the middle if the floor. A kåta works as a tepee with 500 CM air circulating - but we sit only in two sides of the fire. The third side have door and on the forth side is the kitchen (uppersit side from the door.
From the door there goes two logs to the fireplace, one on each side. On both aide if the door there is two holes for incomming frech air - and a third hole behind the kitchen. The cold outisde air flotes between the two logs to the fire,mthe third hole behind the kitchen hold the food cool and give the dire fresh air.
So, fire in rooms ans houses are a "ingine" that hild 500 CM circulating in the room/house. By steering the incomming air in different ways humans create warm places without any draft abd they have a comfortble home to live in
Thomas