Yarder

A yarder is a specialized piece of logging equipment used primarily in cable logging operations, also known as skyline logging. It is essentially a powerful winch or series of winches that control cables, which are used to haul logs from the forest floor to a landing, or collection point. Yarders are typically stationary machines, though some mobile versions exist. Their primary function is to overcome difficult terrain, such as steep slopes or dense undergrowth, where traditional ground-based logging methods are impractical or environmentally damaging.

The term "yarder" is often used interchangeably with "skyline crane," although technically, a yarder focuses specifically on pulling and controlling cables for log extraction, while a skyline crane might encompass a broader range of cable-operated lifting devices.

The operation of a yarder involves several cables:

• Skyline: A heavy cable suspended between two points (often trees or portable towers) forming a "skyline" along which logs are transported.
• Mainline: The cable used to pull the logs towards the skyline.
• Haulback: The cable that returns the carriage or block back to the woods for another load.

The yarder operator controls these cables to lift, move, and lower logs safely and efficiently. The size and power of a yarder vary depending on the terrain, the size of the logs being harvested, and the distance they need to be transported. Modern yarders may be equipped with computerized controls and sophisticated monitoring systems to optimize performance and safety.