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Technodiversity in forestry
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SP-10-33 mechanized harvesting and forwarding with harwarder
Combination of
harvester
and
forwarder
:
forwarder
with
harvester
head at the tip of the crane
Working like
harvester
, but feeding logs directly into the basket until full, then forwarding and unloading
Functiogram
Advantages
1 machine, 1 driver, 1 times moving to the
felling
site
No access for the
harvester
– 1 turn less on the skid road (but
harvester
is not important when followed by
forwarder
)
Cleanest load - no contamination
Limitations, thresholds
While
processing
is
forwarder
not productive, while transporting is the heavy and expensive
harvester
head unproductive
Possible lower payload/tare ratio?
Main use
Only in areas where there is few
harvesting
mass (like singular windthrows, beatle trees) so that machine can finish its job at the first access
Economic suitability
Example:
machine costs without personal costs: 250,00 Euro/h
personal costs per person: 35,00 Euro/h
number of persons: 1
in total: 285,00 Euro/h
regression line minutes per tree
b
0
= 0,5
b
1
(tree volume) = 2,3
b
2
(
skidding
distance) = 0,01
Ecological suitability
:
Ecograms
Social suitability:
S-class: unloading of short wood at forest road -> S4
E-class: advanced machine work, moderate -> E4
»
Technodiversity Glossary
Tags:
PR1-B07
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