A wooden raft is made from dry, sonorous spruce or pine wood. When hit with an ax ax, it makes a loud sound. Dead wood with sweet wood cannot be used. Such a tree will quickly get wet and the wooden raft will sink.
Wooden raft, device, main dimensions, preparation of templates, manufacturing and final assembly.
To determine the specific gravity, a block of wood 10 cm long is sawn from the end of the tree and lowered flat in water. If the sawed-off circle sank no deeper than 5-6 cm, the tree can be used to build a raft. The maximum diameter of logs for a wooden raft should not exceed 25-30. Minimum 10 cm.
For better raft stability, thin woods are placed in the middle, and thick ones along the sides. If the prepared logs have a curvature, they are set humped down. The gaps between the logs of the stav should be at least 2-4 cm. Otherwise, the wooden raft will have reduced stability and slow pop-up.
After laying the logs on the slipway, their top is marked and rolled out to the sides. On an average log at a distance of at least 80 cm from the ends, two grooves are cut and cut down (“dovetail”). The lower planes of the cutouts should be at the same level. The depth of the grooves should not reach the middle of the log. Otherwise, chipping of sawn wood may occur when driving a wedge..
As a template, the end face of the cut-out cross-member-rongin is taken. Ronzhin squeezed out of raw wood, better izobrezy. In the prepared log in the middle, lay the rongin. Ronzhina should freely go from above into the groove of the log. That is, the upper width of the groove should be wider than the lower wide side of the ronzhina.
Wooden raft, appearance and basic dimensions.
A wooden dry wedge is grooved between the inclined plane of the rongin and the inclined wall. Both ronzhiny should lie in one plane. With the help of templates, grooves are made on all other logs and they are alternately attached to the middle log with right wedges and left..
Before you put the extreme logs, they cut out the grooves for the emphasis of the waggons and cut into three racks 10-12 thick and 60-70 cm high, on which they pull the cord or the main rope. On uncomplicated rivers, it is recommended to use a U-shaped cellar.
On two racks, in advance, before the assembly of the stav, vertically cut into the logs of the raft, they put on and wedge the pillow in which they cut out the nest for rowing. So that when wedging racks the logs do not chip, the racks are carried from the bow and stern by at least 0.5 meters.
When rafting along calm rivers or for crossings in reservoirs, a simple knitted wooden raft is made. Logs are collected in becoming overhead rongins with the help of wire twists (staples, rope ties).
To increase stability, a wooden raft can be made wider due to the large gaps between the middle logs. As racks in the logs, they cut and jam racks with a diameter of 10-12 cm, on which rowers are suspended.
Based on materials from the book Homemade Travel Equipment.