SPECIFICATIONS 



311 



Horsepower and draft required to pull a 27,000-lb. tractor 

 over various grades and road surfaces at a net speed of 1.9 

 miles per hour (no allowance for slippage), calculated from 

 actual tests on the same day on level surfaces at speeds of from 

 1 . 77 to 1 . 99 miles per hour: 



