SP-23-33 mechanized forwarding of short logs with tractor and trailer

Picking up logs that are stored alongside skid road, normally separating different assortments, only forwarding together in order to utilize the trailer, transporting to forest road, unloading.

Functiogram

Advantages

Cheaper trailer combined with farm tractor, that can be utilized in better way
Tractor and trailer is faster than forwarder on roads and in road-legal in many countries – intermediate and short distance transportation

Limitations, thresholds

Lower performance than professional forwarder
Lower maximum load
Less off-road mobility than forwarder

Main use

As combination in private forests, where tractor is used in diverse ways

Economic suitability

Example:

machine costs without personal costs: 75,00 Euro/h
personal costs per person: 35,00 Euro/h
number of persons: 1
in total: 110,00 Euro/h
regression line minutes per tree
- b₀ (loading, unloading) = 0,0
- b₁ (tree volume) = 6,0
- b₂ (skidding distance) = 0,005