| Author | Mahmood, Nasser |
| Call Number | AIT Thesis no. AE-86-12 |
| Subject(s) | Tractors--Pakistan--Performance
|
| Note | A thesis submitted in partial fulfillment of the requirements for
the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | Field data was collected for various tractors operating on 41 different
sites in Pakistan for tillage operations to evaluate their tractive performance.
On an average, the tractors' drive tyres were found to be over inflated
by about 1. 5 times the average recommended inflation pressure (i.e . 96.10
kPa as recommended by the manufacturers) . These high inflation pressures
in the drive tyres were also responsible for high power losses and low
tractive efficiencies .
The average forward speed of the tractors during tillage operations was
observed to be 1 .44 m/ sec as against the recommended speed of 1.56 m/ sec
to 2 . 69 m/ sec for such operations.
All the tractors tested were under ballasted. The average actual weight
to optimum weight ratio was 0 .31. Due to under ballasting, the average
wastage of tractor power was estimated to be about 70%. Assuming that all
the tractors were operated around the average recommended speed of 2
m/ sec, the average actual weight to optimum weight ratio was calculated to
be 0.43 . The average power wastage under these conditions was found to
be about 57%.
The calculated tractive efficiency was only 52% of optimum tractive
efficiency, with a maximum value of 96% and a minimum of 27%. |
| Year | 1986 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Gee-Clough, D.
|
| Examination Committee(s) | Singh, Gajendra ;Gupta, Chandra P.
|
| Scholarship Donor(s) | D.A.A. D . Republic of Germany |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1986 |