Abstract
In case of the tractor plowing, the capacity is affected by the running distance of the tractor, but the main difference of the capacity come out from the distance of futile run of the tractor on the headland, as the working distance is determined by the area of field and the plowing width.
Therefore, on the case of starting from centre of field, we have assorted several turning types of the tractor, and yielded the following formulas for calculating the turning distance.
(Method of turning) (Type of turning)
S-turn
Octopus type
Balloon type
Poppet type
Medusa type
U-turn
E-turn
(Distance of futile run)
ΣS0=8/3πrs
ΣSb=5/3πrs
ΣSp=(sπ+3s-1)r
ΣSm=(sπ+s+1)r
ΣU=u{πr+(u-1)b/2}
ΣEa=(3π+4)2re
ΣEb=4πre
S: number of turning (in 2 r)
U: number of turning (out of 2 r)
E: number of 1 circulation
