The paper presents description and analysis of the upgraded felling-skidding machine (FSM). It offers a range of technical solutions for efficiency improvement and FSM using expansion, including fuel chips production and log spurs construction with the wood waste. The creation of FSM with advanced features provides the partial import substitution of machines for CTL logging.

Keywords: felling-skidding machine, modernization, efficiency improvement, logging operations, fuel chips, log spurs

The article describes the construction of a modern forest inventory instrument for forest inventory operations, that is a calipers and an increment borer, combined in one body. The described construction provides combination of two operations, which are determination of diameter of a tree trunk and core sampling .

Keywords: borer, forest instrument, calipers, forest inventory

One of the main tasks when organizing workflows of logging transport is the choice of log truck optimal type for logging under specific operation conditions. The method proved by the authors and engineered modelling program of log trucks traffic parameters give an opportunity to accomplish engineering tasks of the choice of logging transport type to operate under various natural-industrial conditions for certain. The example of the log truck optimal type choice is given.

Keywords: logging transport, grade computations, traffic parameters, performance, import substitution

The article reflects the modern problem of logging process relating to the development of hard-to-forest areas. A perspective for the development of hard-to-forest areas. Given the basic logistics for transporting wood using airships. A mathematical model to describe the performance of the airship to transport timber.The proposed mathematical model to determine the performance of airships in the development of hard-to-forest areas allows: to evaluate the effectiveness of airships in the development of different types of forest areas, choose the best option in the logistic scheme of transportation of timber, and therefore choose the technological equipment, to an economic assessment of the transport component of the timber with airships.

Keywords: Airship, wood transport, processing equipment, productivity, cycle time, logistics

The technique of pilot natural studies by definition of critical effort at which there is a capsizing of the trees together with root system growing on coast of reservoirs of the hydroelectric power stations subject to washout as a result of impact of fluctuations of water level, wind, wave loadings and abrasion is given It is necessary for establishment of possibility of use of trees of a coastal zone as support of rope system of devices for collecting and transportation of wood. Pilot studies were conducted on Bratsk and Ust-Ilimsk reservoirs during the period from 2000 to 2012.

Keywords: coastal zone of reservoirs, the washed-away coast, the coastal water area, critical effort, wind loading, effort of rooting out, prism of roots , support of rope installation, wood transportation, "ownerless wood"

In article considered new rigging locks, for reliable fastening of raft side binding, chains, bindings when forming sections, rulers and rafts from assortments and switches, and also the "ownerless" wood with various dimensional characteristics differing in simplicity, availability and low cost of their production in the conditions of repair bases the timber floating of the enterprises are described.

Keywords: rigging lock, timber bundling, raft, wood alloy, "ownerless wood", coastal water area

The article describes the construction of a modern forest instrument for forest inventory operations. The equipment consists of a caliper and a built-in marking device. The developed construction allows conducting two operations simultaneously: determination of a trunk diameter and marking a measured tree trunk. The suggested construction leaves visual marks on measured tree trunks automatically, that allows avoiding doubling of measuring results.

Keywords: marker, caliper, trunk, taxation

The article examines the existing methods for coupe demarcation and the ways of fixation of wood plots at an area for future logging works. A new method is suggested, based on using RFID-technologies. Fixation of borders in this method is realized using RFID-tags with recorded information placed into the ground. Using the suggested method will allow lowering the labour intensity of coupe demarcation, fixing of exact borders of a logging site at an area, eliminating logging works out of the bounds of cutting areas, etc.

Keywords: wood cutting area, coupe demarcation, forest inventory operations, RFID-technology, RFID-tag

The dependence of allowing to determine the optimal mode of reducing speed when approaching trains to areas with restrictions to ensure maximum road conditions on the average speed. The presented method will accelerate and refine the calculations in modeling the movement of logging trucks.

Keywords: timber transport, traction calculations, traffic simulation, indicators movement, restrictions, braking

The article reflects the contemporary problems of the transport component of the process of logging. The analysis of the financial costs during the development of annual allowable cut, taking into account the construction of roads. The recommendations, the implementation of which contributes to the efficient and cost-effective management of air timber harvesting using a helicopter. The characteristics of the cargo helicopters and slinging mechanisms for logging operations. The calculation of the cycle time of the helicopter on the harvesting operations. Conclusions in areas conducive to efficient use of helicopter logging.

Keywords: Helicopter timber harvesting, Logging operations hoisting mechanisms, cycle time,

In clause the opportunity of use balloon cable system descent to transport operations in remote mountain conditions is described. Dependence of system on wind influences is reflected. Proceeding from this, the design procedure of dynamic pressure which arise in the top suspension bracket of system is resulted, in view of mobility of a balloon under action of a wind. The technique allows to estimate the pressure arising in the top and bottom points of a suspension bracket at change of force of a wind, lengths of a suspension bracket, a corner and speed deviation of a balloon.

Keywords: Cable balloon system, timber transport operations, fluctuations of a rope, dynamic pressure of a rope

Presented article provides the results of experimental studies related on the centrifugal impregnation of pine wood process. The studies were carried out respecting influence of the percentage of summerwood and latewood in the impregnated samples on the speed of centrifugal impregnation (impregnant consumption per processing time), and the impregnation depth (the ratio of the volume of absorbed liquid to the total volume of the pore space of a wood sample). On the basis of these results it is shown that the percentage of latewood in a sample does not significantly affect the speed of centrifugal impregnation, while the percentage of latewood affects the impregnation depth (regression model obtained). Furthermore, it is shown that the inner space filled with the impregnant after centrifugal impregnation occurs uniformly along impregnation front trace. The conclusion follows with a list of promising directions for further research on the subject of wood impregnation process using centrifuges.

Keywords: pine wood, centrifuge, impregnation, impregnation front centrifugal method, deep impregnation, summerwood, latewood, uniformity of impregnation

Presented the results of investigation of the motion of logging trucks using systems GPS-monitoring. Is investigated change of output per shift productivity ​​calculated for considering  trains when moving at a distance of 150 to 500 km in increments of 50 km. Examined the effect of distance of transportation and standard deviation values ​​of speed on change the output per shift productivity. More than that was is studied the influence of transport distance and shift productivity values ​​on the change the cost of removal of 1 cubic meter of timber harvested.

Keywords: output per shift, logging truck, the systems GPS-monitoring, maintenance cost, removal

The article shows the necessity of the research effort results state registration in the form of intellectual property objects – databases and software products. The Petrozavodsk State University’s experience in this field is shown

Keywords: Database, intellectual property, software products, intellectual activity result

The article suggests technique of optimization of tree cutting and skidding process via felling-skidding machines and felling-skidding-processing machines. The realization of this technique will allow reducing of time costs and raising of machine efficiency taking into account accessibility of stand cutting, relief features and technological working conditions.

Keywords: integrated machine, cutting, tree, timber harvesting, skidding.

Production lines for manufacturing of cylindrical logs for wood construction are considered in the article. Technological factors influencing on efficiency of production lines are identified and classified. Results of research can be basis for improving production lines.

Keywords: Woodworking, cylindering, technological line, wood costraction, factors

An analysis of the problem of increasing the efficiency of the functioning of the logging trucks for hauling timber to the lower timber depots and consumers. Proposed technical solutions for of raising cross-trains in complex natural and industrial environments.

Keywords: Active semi-trailer used forestry, passableness, prosary operation.

Following ways to increase the competitiveness of energy biomass are defined. The research of biomass as a raw material for logging and utilization, state encouragement of its industrial utilization, analysis and biomass supplier and customer market grouping, making of effective equipment for its logging, transportation and utilization, feasibility study of equipment parameters and modes of operations, energy biomass performance improvement.

Keywords: alternative fuel,energy biomass, biofuel, logging, competition

Cylindering logs are increasingly being applied for construction of houses. Log production are expensive to and is costly application equipment. The article describes the technical and technological solutions allowing to get round the log on the cutting area and at lower cost.

Keywords: cylindering, through technologies, forestry, functional technological analysis

The article represents the description of the construction of increment borer, its present modifications and additional devices. On the basis of the conducted survey the authors of the article defined the ways for improvement of the borer. Suggested technical solutions are at the stage of patenting  

Keywords: Increment borer, preparatory works of forest logging, tree age, forest inventory, core.

The possibility of combination of wood barking and branches cutting within through technologies of timber industries is shown. Comparison of several such processes is made with the use of functional-technological analysis and hypothesis of expediency of creation of the process technology and equipment for simultaneous group wood barking and branches cutting is formulated.  

Keywords: barking, branches cutting, through technologies, woodworking, timber industry

Present the method for determining the optimal plan wood harvesting and hauling on logging enterprise. The method is recommended for use in enterprises applying cut-to-length logging. Optimization criterion is the minimum cost of harvesting and hauling wood. The method use will reduce costs and increase profitability for enterprise.

Keywords: logging area, base of forest resources, natural factors of production, primary wood transport, network transportation, costs

Results of computer modeling intense the deformed condition of a design of road clothes of the lesovozny highway on vertical movings and tangents to tension by a method of final elements on the program PLAXIS complex are given. Deformation of constructive layers of road clothes occurs under the influence of loadings from a lesovozny road train. Results of researches of change of tangents of tension and vertical movings are given for a covering, the basis, a working layer of earth of a road bed.

Keywords: stone mastic asphalt, lesovozny road train, design of road clothes.

  To estimate the effectiveness of forest machines developed technological possibility coefficient. Coefficients reflect the ability to provide a given performance of transport vehicles in the logging, the decline in the quality of the skid road surface. Method allows determining the amount of logging residues, necessary for the skid road construction. At calculating the available volume accounted for logging residues. Resources of logging residues are calculated depending on the type of timber and the length of skid road. The method allows selecting the optimum system of machines to work in these natural production conditions or schedule performance loss due to reduced carrying capacity of skid road.

Keywords: Cross country, technological passableness, forest machines, bearing capacity of soils, skid road, wood types, logging residues

  To improve the effectiveness of the operation of rotary machines for cutting small trees and bushes upgraded its construction. This made it possible to improve the performance, reliability and durability of the machine, and the quality of cut shredding trees and shrubs.

Keywords: grinding, shrubs, small timber, rotary machine, cutting