Study on the Plowing Capacity of the 4 Wheel Tractor (VIII)

On the Efficiency of the Two Way Plow

Abstract

Concerning the calculation of the plowing efficiency by the two way plow, 2 turning methods, medusa type and cycloid-type are selected from 5 methods in order to avoid complication.
The tractors used in this calculation are shown in Tab. 3, and 2 tractors are reversible type.
Every corrected calculation formula of distance of futile run about each turning method is shown in Tab. 4.
By appling the value of each tractors into the Tab. 4, we can get the efficiency value as shown in Fig. 1-3 about the medusa type, and Fig. 4-6 about the cycloid type.
On the cycloid type, it is obviously find out that if short side of the field B was divided into 2n parts, the ratio of A/B becomes large, and therefore the distance of the futile run becomes short.
Efficiency curve of the special type tractors, B″ and D″, are shown in Fig. 7. In this case, the distance of futile run, is very small and its advantage would be easily understood.
Fig. 8 shows efficiency curve of each method about B and B″ tractors the latter of which is improved from B.
In the case of using over-line turning method, the special type shows the highest value, and also in general case, the additional plowing method (for B line) have an advantage by using B″ tractor.
But in the case of using the normal tractor, method of the cycloid type shows a tendency of high efficiency value.
The efficiency value of the cycloid-type given here, is calculated by dividing short side width B into 10m each. Therefore, the efficiency eurves change its position ley this divided width. If the width of short side is fairly large, the efficiency curve of the special type tractor becomes higher than the value of the cycloid type, and the special tractor will be suitable to use in all case.