Structure Design and Bearing Capacity Analysis for Crawler Chassis of Rice Combine Harvester

Table 6

Rice combine harvester straight travel time (s).

No.	1	2	3	4	5	Mean value/s	Variance	Standard deviation
First gear (1 m/s)	55.65	55.72	55.34	55.60	55.43	55.53	0.1015	0.3186
Second gear (1.5 m/s)	35.78	35.55	35.71	35.30	35.65	35.60	0.1395	0.3735
Third gear (2 m/s)	27.12	26.86	27.15	26.81	26.95	27.03	0.1062	0.3259