Open AccessCOMPARISON OF PRODUCTIVITY OF KRANMAN BISON 10000 FORWARDER IN STANDS HARVESTED WITH HARVESTER AND CHAINSAW
Author(s) -
Santa Kalēja,
Agris Zimelis,
Andis Lazdiņš,
Per Johansson
Publication year - 2018
Publication title -
proccedings of international scientific conference "rural development 2017"
Language(s) - English
Resource type - Conference proceedings
DOI - 10.15544/rd.2017.199
Subject(s) - forwarder , productivity , agricultural engineering , environmental science , engineering , forestry , geography , economics , macroeconomics
The aim of this study is to investigate potential uses of Kranman Bison 10000 6WD forwarder in stands, where roundwood is extracted with a chainsaw and Vimek 404 T5 harvester in normal and difficult forwarding conditions. Productivity of Kranman forwarder was compared with medium-sized John Deere 810 forwarder under normal conditions. In total 230 loads were forwarded during the study, including 63 loads from areas, harvested with a chainsaw, and 167 loads from areas, harvested with Vimek 404 harvester. The average forwarded load is 2.0 m³ (the maximum load is 2.5 m³ therefore the average load capacity is 80%). In average 33 minutes of productive work time were spent by forwarding one load (the proportion of productive working time is 94% from total engine hours of the machine). The average length of forwarding road in trials is 286 m. In normal conditions forwarding of 1 m³ of roundwood extracted with a chainsaw takes 15 minutes of productive working time, but in difficult forwarding conditions the time consumption increases by 13%. The average forwarder fuel consumption is 1.8 L per hour. Accordingly, 0.8 L of fuel are consumed to forward 1 m³ roundwood. In comparison, John Deere 810 under similar conditions consumed 1.6 L fuel to forward 1 m³ roundwood. Study results prove that the best application of Kranman Bison 10000 is forwarding small stands or individual trees logged with a chainsaw. Forwarder can work on soils with low bearing capacity, however productivity can be significantly reduced by stumps and uneven terrain.