194 



LOGGING 



gallons. From i^ to 3 cords of hardwood fuel, i to 2^ tons of 

 steam coal or from 200 to 300 gallons of fuel oil are required. 



A special type of 3-wheeled wagon is often employed for haul- 

 ing logs and lumber with this engine. The front wheel is 3^ feet 

 in diameter, has a 12-inch tire and supports about one-fourth of 

 the load. The remainder of the weight is borne on two rear 

 wheels each 4I feet high and with 16-inch tires. The load is 

 borne on a frame built to carry from 10 to 12 tons. 



Fig. 



A Holt Three-wheeled Traction Engine hauling Sugar Pine Logs. 

 Cahfornia. 



The manufacturers claim that a 60-horse-power engine will 

 haul a load of from 40 to 60 tons at a speed of from 2 to 3 miles 

 per hour, ascending grades as high as 10 per cent. Thirty thou- 

 sand feet of green lumber loaded on three trucks have been hauled 

 up a 10 per cent grade, and 15,000 feet of logs have been hauled 

 on two four-wheeled wagons over a rough log road down a 

 17 per cent grade. An engine hauling empty wagons travels 

 3 or 4 miles per hour. 



