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The Lincoln Tractor Trials, 1920. 



[Nov., 



NOTES ON THE LINCOLN TRACTOR 

 TRIALS, 1920. 



Thompson Close, B. J. Owen, B.Sc. (Eng.), and 

 H. G. Richardson, M.A., B.Sc. 



The recent trials of farm tractors at Lincoln were organised 

 by the Royal Agricultural Society of England in conjunction 

 with the Society of Motor Manufacturers and Traders, who 

 were responsible for the highly successful trials of last year. 

 The trial ground was in close proximity to that chosen in 

 1919, and presented very similar features. The chief difference 

 between the two trials was the method adopted by the Royal 

 Agricultural Society of placing machines in a definite order 

 of merit and awarding gold and bronze medals. In certain 

 classes where the competitors numbered only three (some 

 reduced to a single tractor), two and one, this method had an 

 air of unreality, and the competition was in effect restricted 

 to classes 1, 2 and 7. 



Entries were accepted under seven classes, which are set 

 out below. It will be observed that there were three classes 

 for internal-combustion tractors, one for steam tractors, one 

 for " self-propelled ploughs," and two for cable sets; the last- 

 named, it will be recalled, did not figure in the 1919 trials. 



Class 1. — Internal Combustion Direct Traction, not exceeding 24 H.P., 

 suitable for ploughing two furrows 10 inches wide by 6 inches deep. 



Class 2. — Internal Combustion Direct Traction, not exceeding 30 H.P., 

 suitable for ploughing three furrows 10 inches wide by 6 inches deep. 



Class 3. — Internal Combustion Direct Traction, over 30 H.P., suitable 

 for ploughing four furrows 10 inches wide by 8 inches deep. 



Class 4. — Direct Traction Steam Engine, suitable for ploughing four 

 furrows 10 inches wide by 8 inches deep. Engines to comply with Light 

 Road Locomotive Acts. 



Class 5. — Internal Combustion Double Engine Set, with wire rope 

 haulage for ploughing three or four furrows 10 inches wide by 8 inches 

 deep. Engines to comply with Light Road Locomotive Acts. 



Class 6. — Double Steam Engine Set, with wire irope haulage for 

 ploughing three or four furrows 10 inches wide by 8 inches deep. 

 Engines to comply with Light Road Locomotive Acts. 



Class 7. — Self-propelled plough for ploughing not more than four 

 furrows of not more than 10 inches wide by not more than 8 inches deep. 

 Design. — Among the machines competing in the various 

 classes there was striking uniformity in design and construe- 



