Current issue: 54(4)
Under compilation: 54(5)
The paper deals with the development of hand tools and their maintenance methods, and the improvement of working techniques in Finland in the era when forest work was mostly done by muscular power. The development was carried out in a close connection with professional training, permitting the results to be distributed widely throughout the country at short duration courses, and simultaneously collecting new information.
The phases of the entire development cycle is described from founding of the development and training organization to standardization of the tools and comparisons to similar foreign and Finnish tools. On the basis of this, along with analyses and synthesis performed, new hand-made prototypes were created and then tested on forest work sites. The knowledge was used to produce test series in a tool factory, and feedback was gathered from skilled workers. On experience gained, best tools selected could be put into manufacturing. This work gave a natural basis to investigate even working techniques. Good results were achieved through cooperation between researchers, users, manufacturing industry and trade, as well as vocational training.
The PDF includes a summary in Finnish.
The aim of the study was to compare the newly introduced brush cutter to ordinary hand tools in clearing of cutting areas and thinning young birch (Betula sp.) and Scots pine (Pinus Sylvestris L.) stands. Working with a prototype of the brush cutter, Brushmaster, reduced the total working time by 15-20% compared to bush knife and axe, in spite of the cutter’s weight. At rainy weather the advantage of Brushmaster dissapeared because of clogging of the cutter’s air filter. The prototype proved to be more effective when clearing a cutting area, and hand tools seemed to be faster if damage to the remaining trees have to be avoided.
In addition, eight either lighter or more effective motor saws or brush cutters were compared mutually, and the effect of motor effect, weight, handiness, arrangement of suspenders and handles is discussed. With these improved types of the cutter it was possible to shorten the total working time in thinning of stands (mostly clearing of young stands) to 30-40% of the total working time compared to hand tools. The most modern saws appeared to be best adapted in clearing cutting areas.
The article includes an abstract in English.