Modern harvesting in steep terrains

Slopes are challenging terrains within the forest industry, as forest machines are heavy and may damage the ground surface. Luckily, there have been constant advances in forest machine technology and today solutions exist for collecting timber on steep slopes.

In South America, Logset has tested a separate winch on forwarders with great results.

- If the machine works daily in slopes, I would recommend the separate TWinch assistant developed by Ecoforst. We have used their solutions with our biggest forwarder Logset 12F GT in South America with impressive results, says Logset’s Technical Director Jukka Kivipelto and continues:

- The TWinch makes the machine more versatile, because the cable can be either attached to the front or rear of the chassis. The T-Winch can also easily be transferred to another pulling spot by remote control. 

Maximum power and efficiency with a T-Winch

Logset delivered 12F GT forwarders with clambunk configuration to Biofor in Chile in mid-2016. Their work sites are exclusively clear fells. On the hills, the weight distribution among the eight wheels is uneven and therefore the T-Winch is of a great assistance.

- The synchronized TWinch is automatically connected to the operating machine through radio control. For example, if the driver of the machine stops, the T-Winch also stops. This way the cable always stays tight and secure, Kivipelto explains.

The Logset 12F GT forwarder has a tractive effort of 250 kN. Combined with the T-Winch’s pulling power, the machine operator has 350 kN of tractive power available. The 12F GT combo can operate safely on a regular 45 % slope. On a few occasions, the 12F GTs were performing on 80 % slopes.

- This option is really recommended if you constantly need to forward or skid on slopes and are looking for maximum efficiency. Since the TWinch assistant has its own engine, it doesn’t take power from the operating machine, Kivipelto mentions.

More images
The T-Winch can easily be transferred to another pulling spot by remote control.
In Chile, Biofor is using a Logset clambunk, with which they can pull the whole stems from the slopes. The size of the clambunk is 2,75 m2.