Jawaid Iqbal, Mohammed creator Walter, Despiegelaere, Ir. Chairperson Lysen, Ir. Eric H. Examination Committee Suphat Vongvisessomjai Examination Committee Exell, Robert H.B. Examination Committee C. D. G. (Germany) Scholarship Donor text series technical report th Bangkok Asian Institute of Technology 1981 continuing eng ix, 94 p. This thesis presents the results of the field measurements carried on the Thai multi-bladed windmill ' Sanit-14' and also the results of wind tunnel tests made on the blade profile of the Sanit rotor, which uses a flat plate mounted on an angle iron. The field measurements at 2.75 m head showed that the system at this head has an overall efficiency of about 0.16 at a design velocity of 2.4 m/s. The output of 1 litre/sec, which is normally required for irrigation, is attained at a wind speed of 3 m/ s. ·.At 4. 75 m and 6. 75 m head the overall efficiency is 0.19 and 0:21 respectively, while output of 1 l/s is reached at wind speeds of 3 . 5 m/ s ·and 4 m/ s ·respectively·; Wind tunnel tests on a flat plate mounted on an angle ·iron were necessary since such tests were not reported anywhere in the literature. The test revealed that a flat plate mounted on an angle iron has a c1- design slightly higher than O. 6 and a [Cd/CL]min of 0. 115 which is reached at an angle of incidence of 5. The performance calculations showed that the Sanit rotor has a Cp of 0.25 which is attained at a design tip speed ratio of 1. max A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development Thesis (M.Eng.) - Asian Institute of Technology, 1981 Windmills Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B21563 http://203.159.5.9/ait-thesis/detail.php?q=B21563 110905 20260818171504.0