MICROFICHE REFERENCE LIBFUUW - Cd3wd.com

80enclosed circumference can also be utilized as a treadmill POthat manual power can be directly applied without the use ofgears, shafts, etc.Several other names have been found in use for the noriasuch as:scoop-wheel waterwheel elevator (Algeria)bucket-wheelPersian wheelsakia (Egypt) tanbusadawlab (Persian)tabliyyc.tulunba3.3.1.6 TympanumThe tympanum is a wheel device which consists of several individual,enclosed compartments, similar to the enclosed noria of Figure 3.23.However, in tympanums , each compartment has an inlet on the wheel circumferenceand an outlet adjacent to the wheel hub. Therefore, it is notnecessary to lift the water above the required elevation. Of course, forthe same head, a larger diameter tympanum-wheel is needed than noria-wheel,i.e., the tympanum diameter must be slightly more than twice the head. Dueto this size requirement, tympanums are usually limited to lifts of lessthan 10 ft.Several other names which are applied to this device include:sakia (Egypt) tabootsagia tanabish (Eglwt)sagiyasakiyehdrum-wheelwaterwheeltablia spiral wheelscoop-wheel