小松WD 45ホィールトラクタの作業能力検定試験結果 (第1報)
1959 年 21 巻 3 号 p. 96-102
詳細
1959 年 21 巻 3 号 p. 96-102
The performance tests for Komatsu WD-45 wheel tractor were carried out on the test fields at “Hokudai” and “Tomikawa” areas. The top soil is loose and dry clayey loam at “Hokudai” and light volcanic loam at “Tomikawa”.
The results are as follows.
1. Coefficient of adhesion at “Hokudai” 0.52
2. Practical maximum drawbar pull at “Hokudai” 1200kg
3. Max. tractive efficiency at “Hokudai” about 50%
4. Plowing efficiency, when pulling two-bottom 14″ integral-mounted moldboard plow at the depth of 20cm is 0.36ha/hr at “Hokudai” under 2nd gear operation, and 0.40-0.47ha/hr at “Tomikawa” under 4th gear operation. However, fuel consumptions are both about 2.2 its per 10a.
5. When pulling a single standard mole plow (mounted type, dia of mole ball is 3.5″), we obtained practical maximum penetration of 42cm on the top soil at “Tomikawa” under good conditions, but about 32cm on the loose top soil. It took 1 hour 7 minutes 35 seconds to penetrate along 710m under 1st gear operation, and fuel consumption was less than 8 1ts.
6. It is able to pull a four-gang pick up type 20″×24 disk harrow under 3rd gear operation (1.8-2.0m/sec) on the field plowed 20cm deep. Althongh efficiency is at variance with the methods of harrowing, it is able to cover 0.94-1.25ha/hr. for one round, and fuel consumption is 0.57-0.87 1ts. per 10a.
7. It is able to drive the rotary pulverizer (power-take-off-driven, 185cm wide, 48 tines attached) on loam plowed 20cm deep under 2nd gear operation. Efficiency is 0.683ha/hr. at a depth of 16cm, however it may be increased up to about 0.74ha/hr. when becoming skillful. In this fall, we will repeat the performence tests for Komatsu WD45 on heavy clayey soil.
