First of all i want to apologise for any grammar mistakes, and any other mistakes in writting caus i used google translate to translate all text that you will see here ( Engl is not my native languge so i wrote all in my languge than translated it ). I will trie to fix all things that are not translated , also dont laugh if you read onion instead of bow beacus in my country they mean same thing, also acacia caus g.t. is mixing it with b. locust.
As we know (primarily based on the experience of our ancestors) black locust is extremely durable wood, in every sense: solid, hard, Non-susceptible to decay and insects, long lasting and tough. On that basis by many as a perfect wood for bows. The answer is there somewhere in between, yes and no. Black locust tree is very specific in terms of bow's, because of the special way of making and because of the mechanical properties of wood. I'll try to explain in this tutorial that details the process of development can and critical points in it that need special attention.
First, to clarify the properties of black locust wood .... Wood species vary in compresional tension and endurance. Example: If you take a piece of wood in the shape of the rod and bend it into a semi-circular outer part of his suffering, increasing its length stretching and compression of the inner and reducing their length. This phenomenon is happening at such a small scale that is invisible to the naked eye but it is a crucial factor in making bows. If the piece of wood we continue to bend the will inevitably come to a permanent deformation of the play. What happens in a kind of strong tension (most sawmills): As their name suggests, their fibers better than stretching suffer compaction. Because the outer part to withstand bending but on the inside to collapse, ie. zgnjeÄiÄe because the wood fibers are not as able to withstand compaction, compression. With heavy compression types (mainly conifers) are going the other way around: since the fibers are more resistant to compaction it will stand on the inside of the suffering compaction but will break a piece to the part that suffers stretching outside. Very rare species collapse at the same time, are equally strong and compression and tension. The most imbowsant factor here is the thickness of the piece that moves: 1mm thick sheet of veneer can bend the roll and not crack because the thin, but with increasing wall thickness increases the problem that we're talking. The first picture explains this current exhibition.
This introductory part is not only important for the development of bow's below have to understand the essence of thebow's: Wood shall in no way be overloaded because it will break.
Where is all this locust? He has very good compression, the fibers well suffer compaction. But the tension is even better so that experimental piece still hurt by the compression of fibers. The only solution (except for the few exceptional situations) is to hold a piece of black locust as onions, thin and wide, to reduce the negative effects of compression on the belly of fiber ports. Black locustalso has another problem (in a row) that will always inflict LUKAR problem: if too overwhelming the fibers of the stomach, we compress them too much it will be irreversibly damaged, and this will be evident in the form of stretch marks on the cross piece. For other types of fibers are more or less recover if zagibamo piece too, but at a certain place at Locust NE-he does not forgive mistakes when making such a different kind. One of the first tips: press not too many pieces, the motion must be spread on the entire length of the working harbor.
Making a play for the port must be sufficiently dry. It is understood that about 10% moisture wood. It can be measured by carpenter moisture meter (unreliable method determines the most part wood surface moisture) or holding a piece of black locust in the area where the humidity is 55% and the air temperature is 20-30 C (operating with the U.S. Institute for wood) until you stop losing weight (weight control digital kitchen libra ). Black locust should be split before drying or hatchet and other tools of awareness to the approximate dimensions of the port to be dried as soon as possible, DO NOT REMOVE BARK! We can expect a dry piece somewhere in a month, a story of many years of drying the ordinary fiction, because libra is that tells us everything. One of the most optimal design for bow black locust is pyramidal. What does that mean-bow has a narrow handle and a non-working, thick enough not moving and narrow enough to be comfortable to grip. Handle is made from a light switch on the arm of the future port-they should be in the final state of at least 5 cm wide. Means that the rough shape before drying can leave them at 6 cm wide, we reduce the rest when it starts production. Length with handle day-to-spoke crossings could be about 20 cm. The total bow length should not be less than 1.7 m. Short tapering directly from the widest part of the areas that should be no more than a wide 10-12mm in final form. Because of their shape and are therefore called pyramid bow. One of the advantages of the pyramid bow is its nearly constant thickness of the arms (we explain when we get that far).
When the piece is dry first stage is peeling. It is easily removed by knife . Coarse tore it to pieces. I say rough-no need to be too careful in tree bark (unless no nodes) as the first layer of wood under the bark, sapwood, waste from the game: a few sapwood rings and only have a pith beneath it that we need to create port . Around the node we remove sapwood maximum caution.