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The natural division of labour in lumber camps led to other specialized jobs on logging crews, such as whistle punk, high climber, and chaser. [17] The whistle punk's job was to sound a whistle (usually at the Steam donkey) as a signal to the yarder operator controlling the movement of logs. He also had to act as a safety lookout.
The whistle operator was known as a whistle punk, [16] [17] who was placed between the men attaching the cables (choker setters), [18] and the donkey puncher, so that he could see the choker setters. [16] [19] When the cables were attached, a series of whistle blows signaled the donkey to begin pulling and the choker setters to stay out of harm ...
High lead logging is a method of cable logging using a spar, yarder and loader. It was developed by Oscar Wirkkala. It is accomplished with two lines (cables) and two winches (or cable drums). The mainline or yarding line extends out from one winch, while a second usually lighter line called the haulback line extends out from the other winch to ...
High Lead logging in Western Oregon Cable grue Larix 3T, installed on agricultural tractor. Cable logging, also referred to as skyline logging, is a logging method primarily used on the West Coast of North America with yarder, loaders, and grapple yarders, but also in Europe (Austria, Switzerland, Czech Republic, France, Italy).
This whistle is the reason for the typical "long high - short low - short high" signal sound of steam locomotives in Germany. [18] Chime whistle – two or more resonant bells or chambers that sound simultaneously. In America, railway steam whistles were typically compact chime whistles with more than one whistle contained within, creating a chord.
Signals are illustrated by an for short sounds, and for longer sounds. (Note that these signals and their indications are updated to reflect modern practice; in earlier times there were unique whistle signals for the engineer to, for example, send out and then later recall the brakeman/flagman riding in the caboose.) Those rules marked with an ...
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Logging while drilling (LWD) is a technique of conveying well logging tools into the well borehole downhole as part of the bottom hole assembly (BHA).. Although the terms Measurement while drilling (MWD) and LWD are related, within the context of this section, the term MWD refers to directional-drilling measurements, e.g., for decision support for the smooth operation of the drilling, while ...