Internal combustion engines and tractors, their development, design, construction, function and maintenance; by Zimmerman Oliver Brunner 1873- & International Harvester Corporation

Author:Zimmerman, Oliver Brunner, 1873- & International Harvester Corporation
Language: eng
Format: epub
Tags: Internal combustion engines, Agricultural machinery
Publisher: Chicago
Published: 1918-03-25T05:00:00+00:00

lUust. S2. Titan 10-20. A standard'!arm tractor meetins all requirements for plowing, belt work and hauliilg. It has a twin-cylinder valve-in-head medium-spee<l motor operatinv economically on kerosene and distillates to 89** Baume, a plowing speed and a faster road speed, stands squarely on four wheels, simple and easy to operate.

Chapter IX Tractor Requirements

We have thus far considered the power plant of our general purpose tractor. We have detenmned the kind of fuel we shall bum and the design and construction necessary to secure economical and satisfactory operation on low-grade fuels. Now that we have developed the power, it remains for us to transform this power unto useful work at the drawbar or to the belt pulley. The design of the truck, transmission, speed of the outfit and other important featmres are still to be considered.

It would be impractical to decide on these important featiures without considering the requirements up to which we expect a correctly designed general purpose tractor to measure.

General Requirements Taking all these requirements into consideration, we find that they fall largely under two heads—(1) general requirements, (2) special requirements. The important general requirements are six. The engine must be suitable—

(1) for plowing

(2) for belt work

(3) for hauling

(4) must use cheap fuel economically

(5) must be reasonable in cost

(6) must have a reasonable life

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TRACTOR REQUIREMENTS

The special requirements are so numerous that Ve shall not even attempt to mention them.

In our discussion thus far we have already determined upon a design which will meet the fourth general requirement, that is, we have a tractor which will bum cheap fuel economically.

It remains now to determine a design which will fulfill the remaining conditions. Of these the first three are by far the most important —^making the tractor most desirable for plowing, for belt work and for hauling.

Plowing Most Important Work

Analyzing these three requirements separately, we find that the plowing requirement should receive the greatest consideration because it is the one most likely to utilize the maximum amount of power developed for the longest continuous time. During this time there will be violent changes of load from light operation in turning at the field ends to the almost instant load of all plows in the ground at once.

Therefore the question of driving speed, size and nxmaber of wheels, transmission of power and distribution of weight should be considered from the standpoint of plowing utility.

Best Driving Speed The amount of power to be developed by the engine, the size and proportions of bearings, the quality of the material as well as nearly every feature of design, must be of the best. From this viewpoint the

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