000			03865nam a2200397 4500
005			20260818113706.0
008			080598 th eng
035			_a.b10277584
099		9	_aAIT Thesis no.AE-93-8
100	1		_aIslam, Md. Sirajul
245	1	0	_aField testing of a PTO powered disk tiller in Bangkok clay soil
260			_aBangkok : _bAsian Institute of Technology, _c1993
300			_a76 leaves : _bill.
490	1		_aThesis ; _vno. AE-93-8
502			_aThesis (M.Eng.) - Asian Institute of Technology, 1993
500			_aA thesis s ubmitted in partial fulfilment of the requirements for t he degree of Master of Engineering.
520			_aField t estin g of a PTO powered disk tiller Model F-800 was conducted in Bangkok clay soil. Tests were conducted at different forward speeds of 1, 2, 3, 4 and 5 kmph and 33°, 28° and 23° different gang angles. Average PTO speed was 540 rpm for all the experiment s . Test runs were also conducted without PTO power s upply. All experiments were conducted at 263 average soil moistu re content. The draft power was measured by a three point linkage dynarnometer. The PTO power was measured by a slip ring torque transducer. The power requirement and the tilling effects on soil physical properties were studied after pass 1 and pass 2. Draft power was calculated from draft force and forward speed. The PTO power was calculated from the PTO torque and speed data. The overall performance of powered disk tiller at different gang angles was evaluated in terms of power requirement, change in soil bulk density, total porosity, cone index, mean weight diameter and percent soil inversion. In general, it was observed that the disk tiller required as much as 273 more power at 33° gan g an gle settin g than at 28° gang angle setting. Power. consumptjon was affected by forward speed and the number of passes. At a ny of the gang angle settin gs power consumption was hig her during pass 1 than pass 2. The tiller performed better at 28 ° gang angle compared to 33 ° gang angle in terms of change in bulk density, total porosity, cone index and mean weight diameter. However, higher percentage of soil inversion was obtained at 33° gang angle. At 23° gan g angle, the disk tiller was not able to work properly due to prevention of disk penetration by the gage wheel which was moving on the unplowed field. The powered disk tiller without PTO power supply required heavy draft and the tillage depth was reduced as muc h as 503. It was found by power spectral density analysis that the soil failure frequency for the draft of powered disk tiller ranges from 4-6 cycles/meter and for torque it varies from 3.3-4.3 cycles/revolution of the disk. The wave length of soil failure was higher at 33° gang angle compared to 28° gang angle for both draft and torque.
650		0	_aAgricultural machinery _xTesting
700	1		_aSalokhe, Vilas M., _eChairperson
700	1		_aGupta, Chandra P., _eExamination committee
700	1		_aSingh, Gajendra, _eExamination Committee
700	1		_aClough, David Gee, _eExamination committee
710	2		_aGovernme nt of Norway, _eScholarship donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. AE-93-8
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B16020
907			_a.b10277584 _bmnait _cx
902			_a240401
998			_b2 _c951012 _dm _ea _fx _g0
945			_lmnait
945			_lmnarc
942			_c22
942			_c40
909			_aBarcode : 30050120578009 _bCREATED : 2014-02-18 _cRECORD # : i12765855 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
909			_aBarcode : 30050120376180 _bCREATED : 2016-01-06 _cRECORD # : i1301044x _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
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