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5. Gerasimov Y., Sokolov A. 2010. Decision-support system for harvesting planning in Russia. Proceedings of 43rd International Symposium FORMEC 2010 - Padova, 11-14 July, 2010. 8 p. 46
31. TESTING OF REVOLUTIONARY ROUND WOOD HAULAGE RIG IN SWEDEN Claes Löfroth 1 , Gunnar Svenson 1 , Lennart Rådström 1 , 1 Skogforsk, The Forestry Research Institute of Sweden, Uppsala, Sweden claes.lofroth@skogforsk.se Testing of a revolutionary round wood haulage rig has been going on for more than one year. The rig is 30 m in length, and has a gross vehicle weight (GVW) of 90 tonnes. On two round trips, the volume of round wood that this rig can haul is equivalent to that carried by three conventional haulage rigs. This reduces costs and CO 2 emissions, and also contributes towards enhanced road safety. The rigid truck was manufactured by Volvo Trucks, and the trailer units by Parator. The latest technology and grades of Swedish steel have been used in the construction of the rig to keep the unladen weight as low as possible. Skogforsk is analysing costs, production, fuel consumption, and environmental impact. The Swedish Road Administration is monitoring road safety, road wear, and the load on bridges, and will also be assessing the reaction from the general public to longer and heavier haulage rigs on the roads. Road haulage in Sweden accounts for 25% of the total costs in the forestry sector from stump to mill. Despite improvements in logistics and haulage vehicles, transport costs over the past ten years have risen by 2% per year, largely because of higher fuel prices. In the 1980s and 1990s, the GVW for haulage vehicles in Sweden was increased from 50 tonnes to today’s 60 tonnes. This resulted in a 20% fall in fuel consumption, thanks to fewer vehicles needed to complete the same haulage volumes. This benefited both the environment and the economy. ETT, which is a Swedish abbreviation for One stack more, is a project initiated by Skogforsk to study the consequences of a higher GVW, and extended length, on round wood haulage rigs. The project is a collaborative venture with Skogforsk, the haulage companies, and a national association for the owners of private roads. The aim is to reduce fuel consumption and CO2 emissions by 20–25%. The project work includes studies on new haulage rigs, and testing of the ETT round wood haulage rig that is now operating on a 170-km run from a terminal in the north of the country down to one of SCA’s large sawmills in Piteå. Research Method A number of manufacturers have been involved in the development of the ETT round wood haulage rig. Skogforsk is analysing costs, production, fuel consumption, vibration and environmental impact (CO2, NOx, etc.). The Swedish Road Administration is monitoring road safety, road wear, and the load on bridges, and will also be assessing the general public’s reaction to longer and heavier haulage rigs on the 47
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Rapport 12/2010 fra Skog og landska
Page 3 and 4: FOREWORD In attracting such a large
Page 5 and 6: TABLE OF CONTENTS Keynote 1. Forest
Page 7 and 8: Session 2.3 32. Impact of Extractio
Page 9 and 10: 1. FOREST OPERATIONS RESEARCH IN TH
Page 11 and 12: 2. SIMULATING THE EFFECT OF STRIP R
Page 13 and 14: 3. A LOW-INVESTMENT FULLY MECHANIZE
Page 15 and 16: 4. EFFICIENCY AND ERGONOMIC ADVANTA
Page 17 and 18: 6. COST-EFFICIENCY OF A SYSTEM WITH
Page 19 and 20: 7. ADAPTIVE TREE BUCKING SYSTEM USI
Page 21 and 22: 9. THE COST-EFFICIENCY OF SEEDLING
Page 23 and 24: 10. THE EFFECT OF WOOD PROCESSING C
Page 25 and 26: 12. STUMP EXTRACTION WITH A STUMP D
Page 27 and 28: 13. HARVESTING POTENTIAL OF FOREST
Page 29 and 30: 14. THE IMPACT OF TIMBER HAULAGE ON
Page 31 and 32: 15. STUMP LIFTING PRODUCTIVITY WITH
Page 33 and 34: 16. COMPARISON OF WORKING TECHNIQUE
Page 35 and 36: 18. FOREST OPERATIONS - FROM DOING
Page 37 and 38: 19. DEVELOPING PROFESSIONAL ENTREPR
Page 39 and 40: 20. GREAT POTENTIAL IN CORRIDOR THI
Page 41 and 42: spruce, 12,61 - 17,42 % for birch,
Page 43 and 44: 23. HARVESTING STUMPS FOR ENERGY IN
Page 45 and 46: 24. SCRUTINIZING THE WOOD SUPPLY CH
Page 47 and 48: Table 1. Results of a principal-com
Page 49 and 50: 27. AN EXTRACTION TRAIL GENERATOR U
Page 51 and 52: 29. ASSESSMENT OF VÄSTERBOTTEN CAS
Page 53: • Cost calculation method • Met
Page 57 and 58: 32. IMPACT OF EXTRACTION CONDITIONS
Page 59 and 60: 33. EVALUATION OF DIFFERENT APPROAC
Page 61 and 62: 34. ESTIMATING POTENTIALS OF SOLID
Page 63 and 64: 35. PRODUCTIVITY OF SINGLE GRIP HAR
Page 65 and 66: 36. ANALYSIS OF LARGE-SIZE AND MEDI
Page 67 and 68: 37. FELLING HEADS VS HARVESTER HEAD
Page 69 and 70: 39. COMBINING ADAPTED DUMP TRUCKS A
Page 71 and 72: 40. THE DRYING OF WOOD CHIPS WITH S
Page 73 and 74: Figure 2. Development of profitabil
Page 75 and 76: Table 1. Total economic output from
Page 77 and 78: 44. COMPARATIVE SHELTER-WOOD HARVES
Page 79 and 80: 45. EFFECT OF BOGIE TRACK AND SLASH
Page 81 and 82: 46. NECK MUSCLE ACTIVITY PATTERNS A
Page 83 and 84: 47. BOOM AUTOMATION Löfgren Björn
Page 85 and 86: Keywords: Mechanized seeding, cost-
Page 87 and 88: from the time studies shows that th
Page 89 and 90: 52. PRODUCTIVITY OF HARVESTERS AND
Page 91 and 92: 53. PRODUCTIVITY AND COSTS OF WHOLE
Page 93 and 94: 54. A PROCESS-PERSPECTIVE ON TIMBER
Page 95 and 96: 56. SIMULATION OF SKYLINE SYSTEMS I
Page 97 and 98: 57. VOLUME AND COST CALCULATOR FOR
Page 99: onwards did ground reinforcement wi
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