Logging; the principles and general methods of operation in the United States . TAIL TREE Fig. 53. — A Tail Tree showing the Method of is tightened. attaching the Blocks The head spar tree is also braced by cables to the Tree; also the ^^ gj^^^^^ ^^ pjg ^^ Q The trolley which travels back and forth on the main cable is operated by an out-haul cable and a skidding line. The outhaul cable is f- orf-inch in diameter and passes from a drum on the engine,through a block in the head spar tree, through the trolleyand also through a block on the tail tree, after which it isbrought back and attached to
Logging; the principles and general methods of operation in the United States . TAIL TREE Fig. 53. — A Tail Tree showing the Method of is tightened. attaching the Blocks The head spar tree is also braced by cables to the Tree; also the ^^ gj^^^^^ ^^ pjg ^^ Q The trolley which travels back and forth on the main cable is operated by an out-haul cable and a skidding line. The outhaul cable is f- orf-inch in diameter and passes from a drum on the engine,through a block in the head spar tree, through the trolleyand also through a block on the tail tree, after which it isbrought back and attached to the rear of the trolley. It serves Head Spar TreeLoading (]iD2 RopeLoadiog Cillaii) Cable EjteosiStay Blocks S: Ro|>.. By permission of the Lidgerwood Mfg. 54. — A Cableway Skidder showing the Arrangement of the Linesfor Skidding and Loading. to draw the trolley out along the main cable. The f- or|-inch skidding line passes from a drum on the engine, througha block on the head spar tree, then through a block on thetrolley. It serves as a point of attachment for tongs or other POWER SKIDDING 199 skidding devices. The logs are dragged up to the main cableby this line, which also suspends them and serves to return thetrolley to the head spar tree. When the trolley is run out from the head spar tr^e, theskidding line sags between the two points of support and itsweight pulls the tongs against the trolley. The line is either
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisheretcet, bookyear1913
