LOGGING IN THE DOUGLAS FIR EEGION. 163 



the cars from the point of delivery of the yarding engine. In many 

 cases the loading engine is mounted on the same sled or car as the 

 yardiiig engine, the combination machine being set as close to the 

 head spar tree as possible. 



When the yarding output is large, this method is not entirely 

 satisfactory, since the logs can not be loaded with it as fast as they 

 are yarded. In an attempt to remedy this condition and still use 

 practically the same method, some operators are using two loading 

 lines instead of one (fig. 34), The two lines lead from the loading 

 engine and pass through blocks suspended on guys immediately over 

 the car to be loaded, in the same manner as in the case of the single 

 loading line method. One loading engine designed especially for this 

 method consists primarily of two independent loading engines 

 mounted on a common frame. The drums are fixed to the shaft and 

 can be operated in the same direction or opposite directions at the 

 same time, being controlled by two throttle levers. The cylinders are 

 9:^ by 10 inches. The loading engine is mounted on a 125,000-pound 

 capacity car, immediately in front of the yarding engine. The yard- 

 ing and loading engines and car form a complete yarding and loading 

 unit, somewhat similar to the tree-rigged Lidgerwood overhead 

 skidder. It is not necessary, of course, to mount the loading and 

 yarding engines on a car. Certain advantages, however, result from 

 this arrangement, such as the saving of time when moving, and the 

 elimination of a loading fireman, the loading engine taking its steam 

 from the same boiler as the yarding engine. When operators are 

 properly equipped to get the most out of this equipment, the loading 

 and yarding engines are mounted on a steel car with swivel trucks, 

 the swivel trucks making it possible to set the car to one side of the 

 track without constructing a siding. 



The fixed investment in equipment with this method at one side, 

 where two loading lines are used, amounts to about $4,420, as fol- 

 lows : 



1 9i by 10 inch Duplex loading engine _" $3, 000 



2 loading jacks 120 



2 loading guys 225 



5 blocks I :. 110 



2 loading lines 120 



1 spotting line 45 



Loading engine repair parts and materials 75 



Loading engine sled 250 



Oil burner equipment, including oil and water tank 375 



Miscellaneous equipment 100 



Total 4,420 



Note. — The statement includes operating equipment as well as equipment on hand. 

 Duplex loading engines without boiler cost from $2,200 to $2,400. A steel car costs about 

 $2,000 : with air brakes, .$2,200. 



