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Mechanised Thinning with a Waratah Grapple Harvester and Timberjack Forwarder
MECHANISED THINNING WITH A WARATAH GRAPPLE HARVESTER AND TIMBERJACK FORWARDER Tony Evanson and Mike McConchie ABSTRACT conditions was the Lako harvester in tree length thinning (Raymond et al, 1987). A production study was undertaken of a system using a Waratah HTH Model 230 Extraction by forwarder, while considered single grip harvester and a Timberjack 230 the standard overseas, is becoming a 8 tonne forwarder to production thin a feature of some of the more recent stand of radiata pine on flat country. mechanised thinning operations in New Using a modijiedfifth row outrow method, Zealand. For example, a Volvo 861 the harvester selected, felled and delimbed forwarder was studied in shortwood approximately 60 trees per productive thinning (Raymond and Moore, 1989). machine hour (PMH) in a mean merchantable tree size of 0.48d (29 The two most important factors affecting T~~/PMH).The forwarder extracted log the productivity of harvesters, delimbers lengths of 5.0 to 6.0 metres (0.17 tonne or processors working in radiata pine is piece size), in 11.0 tonne loads, a distance the level of malformation and branch size. of 200 metres to a landing. The extraction These aspects of mechanised harvesting productivity of the forwarder was 22.6 have been examined in several previous m3/p~~.A dzference in productivity of studies (Johannsson and Terlesk, 1989, around 30% between the two forwarder Johannsson, 1990). operators was measured, while a dzference of 25% between the two This Report describes an operation using Waratah operators was found. a single grip harvester and a forwarder in production thinning of radiata pine in New Zealand. -
2001 Pacific Logging Congress • in the Woods • Presidents Message •
2001 PACIFIC LOGGING CONGRESS • IN THE WOODS • PRESIDENTS MESSAGE • at $20 US per person or a 3-day pass at Greetings! $50 US per person. So register now and you will receive up-to-the-minute It's been four years since the last information on the 2001 "In the Pacific Logging Congress "In-The- Woods" show program and activities. Woods" Show in Washington State. On-site registration will be available at Mark your calendars for September the bus parking area. 19-22, 2001 for the 4th "In the Woods" Show passes include: show, which will be held on Longview •Access to all equipment demonstra- Fibre Timberland, 35 miles west of tion areas and exhibitor displays. downtown Portland on Hwy 26. The •Tickets to Thursday Hosted Benson Hotel will serve as the head- Hospitality events. quarter hotel. To make room reserva- You may also purchase tickets to tions call 888-523-6766, be sure to let the Reception and Banquet on Friday them know you are with the Pacific evening. Logging Congress group. To receive Please consider a contribution to the discount rate, please make reserva- Joel Olson the Pacific Logging Congress tions before August 18. Education Fund. PLC will host an The Pacific Logging Congress live Education Day on September 19th, "In-The-Woods" Show, is the largest Congress, "In-The-Woods" Show, is by inviting over 3,000 students and teach- active logging equipment show in the registration only. You must have a ers from Portland area schools to United States. Leading product lines paid ticket to attend. -
TOLL FREE: 1-800-669-5613 Matic Ad Taker Will Take Your Ads
Want To Place Your Classified Ad In IronWorks? Call 334-669-7837, 1-800-669-5613 or Email: [email protected] IRONWORKS RATES; Space available by column inch only, one inch minimum. Rate is $50 per inch, special typeset - ting, borders, photo inclusion, blind ads, $10 extra each. Deadlines: By mail, 15th of month prior to publication. Place your ad toll-free 24 hours a day from anywhere in the USA (except Alaska and Hawaii) 1-800-669-5613 ask for IRONWORKS Classifieds 8:30-5 pm CST. After business hours our auto - TOLL FREE: 1-800-669-5613 matic ad taker will take your ads. 9 0 2 ARMY 6X6 TRUCKS 6 1 2 ⁄2 Ton # 5 Ton # 10 Ton EQUIPMENT FINANCING IF YOU ARE A LOGGER, THEN THIS IS Pull Out Trucks YOUR PARTS RESOURCE CENTER • Preferred Good Credit Plans • Rough Credit Plans CHECK US OUT ON THE WEB. WE HAVE QUALITY USED (turned down, tax liens, bankruptcies) Loader Chassis TIGERCAT, JOHN DEERE, CAT, HYDRO-AX & PRENTICE PARTS AT AFFORDABLE PRICES. • Purchases • Refinance • Start-up Business Complete ** CAT 525C: 165-5509 Fuel Tank Assembly .$500 ** John Deere 648GIII: AT367621 DF Grapple - • Loans Against Military Truck Your Existing Equipment Boom .....................................................$3,000 Parts Inventory for QUICK CASH! ** Tigercat 720 Series: 9488B Dual Motor Trans 2-Hour Approvals! Gearbox ...........................................$3,000/Exc Low Monthly Payments Little or No Down Payments ** Tigercat 620: BH530 32" Suction Fan .......$250 ALL WHEEL DRIVE 15 Years In Business ** Tigercat 5000: 3112D Drive Shaft Spindle CALL NOW .......................................................$1,000/Exc 985-875-7373 MEMPHIS EQUIPMENT Fax: 985-867-1188 CONTACT: Email: [email protected] 766 S. -
Investigation of Feller-Buncher Performance Using Weibull Distribution
Article Investigation of Feller-Buncher Performance Using Weibull Distribution Ebru Bilici Forestry Department, Dereli Vocational School, Giresun University, Giresun 28950, Turkey; [email protected] Abstract: With the advancement of technology in forestry, the utilization of advanced machines in forest operations has been increasing in the last decades. Due to their high operating costs, it is crucial to select the right machinery, which is mostly done by using productivity analysis. In this study, a productivity estimation model was developed in order to determine the timber volume cut per unit time for a feller-buncher. The Weibull distribution method was used to develop the productivity model. In the study, the model of the theoretical (estimated) volume distributions obtained with the Weibull probability density function was generated. It was found that the c value was 1.96 and the b value was 0.58 (i.e., b is the scale parameter, and c is the shape parameter). The model indicated that the frequency of the volume data had moved away from 0 as the shape parameter of the Weibull distribution increased. Thus, it was revealed that the shape parameter gives preliminary information about the distribution of the volume frequency. The consistency of the measured timber volume with the estimated timber volume strongly indicated that this approach can be effectively used by decision makers as a key tool to predict the productivity of a feller-buncher used in harvesting operations. Keywords: forest operations; productivity; Weibull distribution; feller-buncher Citation: Bilici, E. Investigation of Feller-Buncher Performance Using 1. Introduction Weibull Distribution. Forests 2021, 12, Innovative management strategies will be necessary in managing forest resources, 284. -
Mobility Range of a Cable Skidder for Timber Extraction on Sloped Terrain
Article Mobility Range of a Cable Skidder for Timber Extraction on Sloped Terrain Andreja Đuka *, Tomislav Poršinsky, Tibor Pentek, Zdravko Pandur ID , Dinko Vusi´c and Ivica Papa ID Faculty of Forestry, University of Zagreb, Svetošimunska 23, 10000 Zagreb, Croatia; [email protected] (To.P.); [email protected] (Ti.P.); [email protected] (Z.P.); [email protected] (D.V.); [email protected] (I.P.) * Correspondence: [email protected] Received: 2 August 2018; Accepted: 27 August 2018; Published: 30 August 2018 Abstract: The use of forestry vehicles in mechanised harvesting systems is still the most effective way of timber procurement, and forestry vehicles need to have high mobility to face various terrain conditions. This research gives boundaries of planning timber extraction on sloped terrain with a cable skidder, considering terrain parameters (slope, direction of skidding, cone index), vehicle technical characteristics and load size (5 different loads) relying on sustainability and eco-efficiency. Skidder mobility model was based on connecting two systems: vehicle-terrain (load distribution) and wheel-soil (skidder traction performance) with two mobility parameters: (1) maximal slope during uphill timber extraction by a cable skidder based on its traction performance (gradeability), and (2) maximal slope during downhill timber extraction by a cable skidder when thrust force is equal to zero. Results showed mobility ranges of an empty skidder for slopes between −50% and +80%, skidder with 1 tonne load between −26% and +63%, skidder with 2 tonne load between −30% and +51%, skidder with 3 tonne load between −34% and +39%, skidder with 4 tonne load between −35% and +30% and skidder with 5 tonne load between −41% and +11%.These results serve to improve our understanding of safer, more efficient timber extraction methods on sloped terrain. -
Northeastern Loggers Handrook
./ NORTHEASTERN LOGGERS HANDROOK U. S. Deportment of Agricnitnre Hondbook No. 6 r L ii- ^ y ,^--i==â crk ■^ --> v-'/C'^ ¿'x'&So, Âfy % zr. j*' i-.nif.*- -^«L- V^ UNITED STATES DEPARTMENT OF AGRICULTURE AGRICULTURE HANDBOOK NO. 6 JANUARY 1951 NORTHEASTERN LOGGERS' HANDBOOK by FRED C. SIMMONS, logging specialist NORTHEASTERN FOREST EXPERIMENT STATION FOREST SERVICE UNITED STATES GOVERNMENT PRINTING OFFICE - - - WASHINGTON, D. C, 1951 For sale by the Superintendent of Documents, Washington, D. C. Price 75 cents Preface THOSE who want to be successful in any line of work or business must learn the tricks of the trade one way or another. For most occupations there is a wealth of published information that explains how the job can best be done without taking too many knocks in the hard school of experience. For logging, however, there has been no ade- quate source of information that could be understood and used by the man who actually does the work in the woods. This NORTHEASTERN LOGGERS' HANDBOOK brings to- gether what the young or inexperienced woodsman needs to know about the care and use of logging tools and about the best of the old and new devices and techniques for logging under the conditions existing in the northeastern part of the United States. Emphasis has been given to the matter of workers' safety because the accident rate in logging is much higher than it should be. Sections of the handbook have previously been circulated in a pre- liminary edition. Scores of suggestions have been made to the author by logging operators, equipment manufacturers, and professional forest- ers. -
Mechanization in Short Rotation, Intensive Culture Forestry"; 1994 March 1-3; Mobile, AL
Proceedings of the IEA/BA Task IX, Activity 1 International Conference Mobile, Alabama USA March 1-3, 1994 Edited by Bryce J. Stokes and Timothy P. McDonald U.S.D.A. Forest Service DeVall Drive Auburn University, Alabama 36849 Hosted by Scott Paper Company Sponsored by IEA/BA Task IX, Activity 1 Electric Power Research Institute Oak Ridge National Laboratory U.S. Department of Energy Southern Forest Engineering Center Auburn University Southern Forest Experiment Station U.S.D.A. Forest Service Southeastern Regional Biomass Energy Program Demonstration Sponsored by Morbark Industries Table Of Contents Foreward Session I (Moderator - Jim Decosmo) Industrial short rotation intensive culture operations,Thomas H. Morgan, Jr Harvesting costs and utilization of hardwood plantations, Timothy P. McDonald and Bryce J. Stokes Short rotation forestry in loblolly pine, Alan P. Bruce Utilization of cottonwood plantations, C. Jeffrey Portwood Stand Establishment and Culture of Hybrid Poplars, Charles E. Kaiser, Donald E. Rice, and Kirk R. Wallace Development of a flail harvester for small diameter brush and coppiced trees to produce energy/chemical feedstock, Robert A. McLauchlan, Andrew Conkey, Greg Scherer, Peter Felker, and Stan Brown Mechanization of short rotation intensive-culture wood crops, William B. Stuart Growing Eucalyptus for Pulp and Energy, James A. Rydelius Session II (Moderator - Sam Foster) Management of irrigated hybrid poplar plantations in the Pacific Northwest, Charles A. Wierman Mechanization potential for industrial-scale fiber and energy plantations, Bruce Hartsough and Randall Richter Establishing and tending poplar plantations in the North-Central U.S., Dan Netzer and Ed Ward Hansen Silvicultural techniques for short rotation Eucalyptus plantations in Brazil, Ken McNabb The effects of whole tree harvesting on fuel quality and coppicing ability of SRIC willow crops, Juha Nurmi and Jyrki Hytönen Utilization of short rotation forestry from an effluent disposal scheme, Hamish T. -
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United States Department of MECHANIZED SYSTEMS FOR Agriculture ARVESTING ASTERN ARDWOODS Forest H E H Service Northern Research Station Chris B. LeDoux General Technical Report NRS-69 Abstract In the central Appalachian region, hardwoods traditionally have been harvested by chainsaw felling with trees and logs extracted from the forest to landings by rubber-tired skidders, bulldozers, and crawler tractors. In recent years, mechanized systems that include feller bunchers and cut-to-length (CTL) processors coupled with forwarders and clambunk and grapple skidders have been used increasingly to harvest Eastern hardwoods. Feller bunchers fell trees and pile stems or logs in bunches. CTL processors fell trees and delimb them, buck the stems into logs, and pile them in presorted bunches. Wood piles and bunches are transported to landings by a clambunk or grapple skidder or a forwarder. These system combinations for processing and transporting essentially eliminate the need for woods workers on the ground, a major advantage from a production and safety standpoint, and greatly reduce adverse effects on the site compared to chainsaw felling and conventional skidding. Feller buncher and CTL systems are reviewed, results of environmental impact studies are presented, and cost equations for a range of operating conditions in Eastern hardwoods are provided. The Author CHRIS B. LEDOUX is a research industrial engineer with the U.S. Forest Service’s Northern Research Station at Morgantown, West Virginia. Manuscript received for publication December 2009 Cover Photo 1. Cut-to-length processor (photo courtesy of Andrew 2 Whitman, Manomet Center for Conservation 1 Sciences); 2. Crawler dozer (photo courtesy of Caterpillar); 3. -
Pnw Gtr092.Pdf
ABSTRACT An operational test of a small, pro- totype running skyline yarder was con- ducted early in 1978. Test results indicate that this yarder concept prom- ises a low cost, high performance system for harvesting small logs where skyline methods are indicated. Timber harvest by thinning took place on 12 uphill and 2 downhill skyline roads, and clearcut harvesting was performed on 4 uphill skyline roads. Skyline roads were spaced about 46 meters (150 feet) apart and were up to 335 meters (1,100 feet) long. Delays caused by the yarder were insignificant. Production as high as 343 logs per day was achieved. KEYIJORDS: Logging equipment engineering, production studies(-forest operations, logging operations analysis/design, logging economics. Contents Introduction .............1 Yarding System ............1 Testsite. ..............3 Logging Layout ............3 Logging Operation. ..........4 Test Description ...........4 Test Results .............4 Summary. ...............7 Literature Cited ...........7 Yarding System The peewee yarder operates a running skyline system as shown in figure 1. MAIN LINE7 HAULBACK UN SLACK-PULLING/ LINE Figure 1.--Running skyline system. The running skyline system was chosen because it provides a combination of features which are not available with other cable logging systems. These include: high mobility due to minimum Introduction rigging and small, light lines; versa- tility due to the ability to log uphill An operational test of the prototype and downhill; and lateral yarding capa- peewee yarder was performed as part of bility for partial cut operations which a program to develop a system for is provided by the slack-pulling car- harvesting small logs in areas where riage. General specifications for the cable logging methods are required. -
LOGGING and LOG TRANSPORT in TROPICAL HIGH FOREST Log Extraction in Waterlogged Areas by Means of Blasted Ditches, Surinam
rv0D AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS As recorded information on methods, production and costs of logging and transport in the developing world - and especially in tropical high forest - is scarce, one of the main purposes· of this manual is to focus attention on the analytic approach needed to quantify output and costs data. An important element of tropical high forest logging is examined: the influence of physical and economic conditions on production. Production and cost data are presented, as far as available information permits, for the most commonly used logging methods adaptable to this. particular situation. LOGGING AND LOG TRANSPORT IN TROPICAL HIGH FOREST Log extraction in waterlogged areas by means of blasted ditches, Surinam. (Bubberman/Vink) FAO Forestry Development Paper No. 18 LOGGING AND LOG TRANSPORT IN TROPICAL HIGH FOREST A manual on production and costs FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS Rome, 1974 The copyright in this book is vested in the Food and Agri culture Organization of the United Nations. The book may not be translated, nor may it be reproduced, in whole or in part, by any method or process, without written permission from the copyright holder. Applications for such permis sion, with a statement of the purpose and extent of the reproduction desired, should be addressed to The Director, Publications Division, Food and Agriculture Organization of the United Nations, Via delle Terme di Caracalla, Rome, Italy. @ FAO 1974 Printed in Italy CONTENTS Introduction . 1 PURPOSE OF THE STUDY 1 SOURCES OF INFORMATION 2 Field studies - Questionnaires - Literature 1. Theoretical framework . 4 SELECTION OF FACTORS AFFECTING PRODUCTION 4 LIMITATIONS OF THE STUDY . -
Bailey's Logger Wear $17999 $19999
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Productivity and Cost of Manual Felling and Cable Skidding in Central
." .~ ~' Productivity and cost of manual felling f< 1 f:.I and cable skidding in central Appalachian hardwood forests Jingxin Wang* Charlie Long Joe McNeel John Baumgras chainsaw and skidding with a cable Abstract skidder. Time studies showed that hour- A field production stlldy was conducted for a manual harvesting system using a ly felling production increased while chainsaw and cable skidder in a central Appalachian hardwood forest site. A partial cut skidding productivity decreased from was performed on a 50-acre tract with an average slope of25 percent. Felling time per the treatments 45 percent, to-60 percent, tree was most affected by diameter at breast height and the distance between harvested and to 75 percent of residual stocking. trees while skidding cycle time was mainly affected by turn payload size and skidding Regression equations were later devel- distance. Productivity of chainsaw felling was 362 ft.3 per productive machine hour oped based on the above time-study data (pMH) (2.23 thousand board feet [MBF]/PMH) with a wlit cost of$8.0/cunit (100 cu- (Brock et a1. 1986), which can be used bic feet) ($13.0/MBF). Cable skidding productivity was 289 ft.3/pMH (1.78 MBF/ for estimating production rates and costs PMH) and unit cost was $27.0/cunit ($50.0/MBF). The balanced manual harvesting for similar thimling operations. system could produce 7,236 ft.3 per week (44.63 MBF/week) with unit cost of Howard (1987) took a different ap- $37.0/cunit ($60.0/MBF). proach to estimating timber harvesting production and cost with cable skidders by collecting shift-level data on fuel consumption, repairs, maintenance, different machine and harvest prescrip- and other operating costs and combined GenerallY the more mechanized the tions.