Full text of this article is only available in PDF format.

Matti Kärkkäinen

Optimaalisesta vinssausmatkasta.

Kärkkäinen M. (1970). Optimaalisesta vinssausmatkasta. Silva Fennica vol. 4 no. 4 article id 4830. https://doi.org/10.14214/sf.a14619

English title: The optimum winching distance.

Abstract

The goal of this study was to develop a mathematical model for determination of the optimal winching distance in different conditions as based on harvesting costs. In the thinned forest the strip roads are parallel and the winching routes perpendicularly to them. A directed felling of trees is used so that it is easy to make loads to be winched. The stems can also be prepared to timber assortments on the stump area and gathered to loads for skidding alongside the winching routes.

After winching the timber is transported using a forwarder mowing on the strip roads. If the stems have not been bucked in the forests, they are to be prepared to timber assortments before the following transportation, because the problem of turning whole stems in a thinned forest has not yet been solved.

In the mathematical model the formation of the costs was described using 18 variables of which 15 had an effect on the optimum winching distance. Some empirical values were estimated concerning these variables, and the corresponding optimum winching distance were computed. The optimum was mainly determined by the quantity of timber harvested per unit area, the size of the winching load, the regression coefficient of the times which were depended on the winching distance.

According to the model, the deviation from optimum winching distance does not cause a very great change in the analysed total costs. When the winching distance is longer, the increase of the costs is smaller than if it is shorter than optimum. In general, the increase of the costs was so small that in practice one obviously can be satisfied with rather approximate methods in determining the suitable winching distance.

The PDF includes a summary in English.

Original keywords
harvennushakkuu; puunkuljetus; vintturit; vinssausmatka; korjuukustannukset; ajourat; puunkorjuu

English keywords
winching distance; terrain transportation; forest haulage; harvesting costs; forwarders; strip roads

Published in 1970

Available at https://doi.org/10.14214/sf.a14619 | Download PDF

Creative Commons License

Register
Click this link to register for Silva Fennica submission and tracking system.
Log in
If you are a registered user, log in to save your selected articles for later access.
Contents alert
Sign up to receive alerts of new content

Your selected articles
Your search results
Kärkkäinen M. (1986) Value relations of Scots pine and Norway spruce .. Silva Fennica vol. 20 no. 2 article id 5267
Kärkkäinen M. (1986) Model of knottiness of wood material in pine, sp.. Silva Fennica vol. 20 no. 2 article id 5266
Kärkkäinen M. (1986) Value relations of birch veneer logs and stems i.. Silva Fennica vol. 20 no. 1 article id 5261
Kärkkäinen M., Pietilä J. et al. (1985) Impact bending strength of Finnish tree species .. Silva Fennica vol. 19 no. 4 article id 5255
Kärkkäinen M., Halinen M. (1985) Reappraisal of minimum requirements of Scots pin.. Silva Fennica vol. 19 no. 3 article id 5246
Kärkkäinen M. (1985) Norway spruce wood grown in Finland compared wit.. Silva Fennica vol. 19 no. 2 article id 5238
Kärkkäinen M., Marcus M. (1985) Shrinkage properties of Norway spruce wood. Silva Fennica vol. 19 no. 1 article id 5231
Kärkkäinen M. (1984) Effect of tree social status on basic density of.. Silva Fennica vol. 18 no. 2 article id 5208
Kärkkäinen M. (1984) The proper attitude towards birch in forestry Silva Fennica vol. 18 no. 1 article id 5206
Kärkkäinen M., Hakala H. (1983) Effect of log size on the bending and compressio.. Silva Fennica vol. 17 no. 2 article id 5182
Kärkkäinen M., Dumell O. (1983) Effect of basic density and growth ring width on.. Silva Fennica vol. 17 no. 2 article id 5181
Kärkkäinen M. (1982) Note on the calculation of the internal rate of .. Silva Fennica vol. 16 no. 4 article id 5170
Haarlaa R., Kärkkäinen M. (1982) Fibre length in common alder Silva Fennica vol. 16 no. 4 article id 5166
Bhat K.M., Kärkkäinen M. (1982) Wood anatomy and physical properties of the wood.. Silva Fennica vol. 16 no. 1 article id 5155
Bhat K.M., Kärkkäinen M. (1981) Variation in structure and selected properties o.. Silva Fennica vol. 15 no. 2 article id 5115
Kärkkäinen M. (1981) Utilization of aspen and poplars (genus Populus) Silva Fennica vol. 15 no. 2 article id 5114
Bhat K.M., Kärkkäinen M. (1981) Wood anatomy and physical properties of wood and.. Silva Fennica vol. 15 no. 2 article id 5113
Bhat K.M., Ferm A. et al. (1981) On the properties of one-year shoots of Betula p.. Silva Fennica vol. 15 no. 1 article id 5097
Bhat K.M., Kärkkäinen M. (1981) Variation in structure and selected properties o.. Silva Fennica vol. 15 no. 1 article id 5096
Bhat K.M., Kärkkäinen M. (1981) Variation in structure and selected properties o.. Silva Fennica vol. 15 no. 1 article id 5095
Kärkkäinen M., Voipio R. (1980) Finnish literature on aspen and poplar species (.. Silva Fennica vol. 14 no. 4 article id 5090
Bhat K.M., Kärkkäinen M. (1980) Distinguishing between Betula pendula Roth. and .. Silva Fennica vol. 14 no. 3 article id 5084
Kärkkäinen M. (1980) Observations on the out-of-roundness and deviati.. Silva Fennica vol. 14 no. 3 article id 5083
Kärkkäinen M. (1979) Barking loss of mechanically loaded piles Silva Fennica vol. 13 no. 2 article id 5034
Kärkkäinen M. (1978) The effect of barking on the pile density Silva Fennica vol. 12 no. 3 article id 5005
Kärkkäinen M. (1978) Occurrence of decay in aspen logs Silva Fennica vol. 12 no. 3 article id 5004
Kärkkäinen M. (1978) Observations on the effect of age on the basic d.. Silva Fennica vol. 12 no. 1 article id 4989
Kärkkäinen M. (1978) Observations on the calculations of the basic de.. Silva Fennica vol. 12 no. 1 article id 4987
Kärkkäinen M. (1977) Editorial observations on scientific series in f.. Silva Fennica vol. 11 no. 3 article id 4976
Kärkkäinen M., Raivonen M. (1977) Mechanical strength of reaction wood Silva Fennica vol. 11 no. 2 article id 4965
Kärkkäinen M. (1977) Comparison of wood properties of Parana pine and.. Silva Fennica vol. 11 no. 1 article id 4958
Kärkkäinen M. (1976) Auxiliary observations on the measurement of the.. Silva Fennica vol. 10 no. 4 article id 4950
Kärkkäinen M. (1976) Density and moisture content of wood and bark, a.. Silva Fennica vol. 10 no. 3 article id 4948
Kärkkäinen M. (1976) Measurement of basic density of total tree chips Silva Fennica vol. 10 no. 3 article id 4947
Kärkkäinen M. (1976) Height and width of rays in Scots pine stems Silva Fennica vol. 10 no. 2 article id 4938
Kärkkäinen M. (1975) Development of stump utilization in Finland Silva Fennica vol. 9 no. 4 article id 4927
Kärkkäinen M. (1975) Ovalness of Scots pine logs in Northern Finland Silva Fennica vol. 9 no. 4 article id 4925
Kärkkäinen M. (1975) Measurement of the cross-sectional area of birch.. Silva Fennica vol. 9 no. 3 article id 4922
Kärkkäinen M. (1974) Note on the volume based on the mean of butt and.. Silva Fennica vol. 8 no. 2 article id 4899
Kärkkäinen M. (1974) Foundations of middle form factor in the measure.. Silva Fennica vol. 8 no. 1 article id 4896
Kärkkäinen M. (1973) A note on the moving distance of pulpwood bolts Silva Fennica vol. 7 no. 3 article id 4883
Kärkkäinen M. (1973) Amount and size of rays in Scots pine stems Silva Fennica vol. 7 no. 2 article id 4879
Kärkkäinen M. (1973) The size of stems in estimating the time consump.. Silva Fennica vol. 7 no. 1 article id 4874
Kärkkäinen M. (1972) The proportion of heartwood in Norway spruce (Pi.. Silva Fennica vol. 6 no. 3 article id 4872
Kärkkäinen M. (1972) A point of view on the average output in forest .. Silva Fennica vol. 6 no. 2 article id 4867
Kärkkäinen M. (1972) Observations on the branchiness of Norway spruce Silva Fennica vol. 6 no. 2 article id 4864
Kärkkäinen M. (1971) Decay following logging injury in stems and root.. Silva Fennica vol. 5 no. 3 article id 4848
Kärkkäinen M. (1970) The optimum winching distance Silva Fennica vol. 4 no. 4 article id 4830
Kärkkäinen M. (1970) Significance of logging waste in thinnings as to.. Silva Fennica vol. 4 no. 2 article id 4819
Kärkkäinen M. (1970) The choice of power saws on the basis of the pri.. Silva Fennica vol. 4 no. 2 article id 4818
Kärkkäinen M. (1969) The amount of injuries caused by timber transpor.. Silva Fennica vol. 0 no. 100 article id 7609