A One -Wheeled Motor Tractor 



A concrete illustration of how the difficulty- 

 was solved of making one wheel replace two 



THAT a one- 

 wheeled trac- 

 tor Dossesses 

 certain real conveni- 

 ences over a two- 

 wheeled affair has long 

 been recognized, but 

 the problem of working 

 out the practical diffi- 

 culties encountered 

 were many and not 

 easily overcome. The 

 accompanying illustra- 

 tions show an ingenious 

 solution of this prob- 

 lem, and give a com- 

 prehensible demon- 

 stration of how the 

 various difficulties 

 were overcome. Some 



5teerir\g wheel 



steering gear 



For hauling guns over narrow trails 

 or broken ground this tractor 

 would be better than army mules 



Gasolirxe ervglne 



[xKavjst lii\e 



Er\gine-startir\q 

 crarvk 



Bvjmp' 



Cor\tro 



Bull-wheel 



Hesivy radiator icts j), 



as balance weight 

 toer\gir\e 



Showing the interrelation of 

 parts in the one-wheeled 

 tractor, and its compactness 



of the problems encountered 

 were the difficulty of trans- 

 mitting the power from the 

 engine to the driving wheel 

 without a heavy and in- 

 tricate system of gearing, 

 of gearing down the engine 

 revolutions in order to give 

 greater power at the driving 

 wheel, of providing means 

 for changing the gearing as 

 the conditions of load or 



road might demand, 

 and, finally, of getting 

 all these mechanisms 

 into a compact space 

 and of making it pos- 

 sible for the wheel to 

 turn a complete circle 

 of three hundred and 

 sixty degrees in order 

 to meet abrupt turn- 

 ing conditions. 



All of these prob- 

 lems seem to have 

 been solved in the one- 

 wheel tractor shown on 

 this page, the various 

 mechanical contriv- 

 ances for power trans- 

 mission and gear-shift- 

 ing being shown in the 

 diagrammatic picture, 

 and the attachment of the trac- 

 tor to a fire-engine being pic- 

 tured in another. The illustra- 

 tion at the top shows how the 

 tractor could be made to do its 

 bit in the game of war by haul- 

 ing guns over roads not passable 

 by larger motor vehicles. ^ 



The model has a four-cylinder 

 gasoline engine, three-speed gears, 

 a heavy radiator, and every part 

 of the mechanism heavily rein- 

 forced. The tires are solid rubber. 



The old fire engine is attached to the tractor simply 

 by changing from the pole and whipple-tree to a yoke 



8.50 



