MICROFICHE REFERENCE LIBFUUW - Cd3wd.com

86sufficiently compact and lightweight so as to allow it to be easily trans-ported, e.g., on the back of an animal such as a donkey-- see Molenaar(1956). A crew of this basic construction, with necessary bearings andhandle for manual crank-operation,would cost about $20-$35, depending onavailable materials (Molenaar, 1956). Typical performances of such devicesare listed in Table 3.7, part A.A variation of this basic wooden design utilizes instead a metalauger which turns inside an outer metal cylinder, as in Figure 2.3. SuchTable 3.7Screw performanceLift(ft)Discharge(wm)Power Remarks ReferenceA.)1.6 65 - 1 man 6 x 1.3 ft Molenaar, 19562.5 65 2 men 8.3 x 1.3 ft Molenaar, 19561.6 100 2 men 6.7 x 1.6 ft Molenaar , 19560.8 2 men 5 x 1.8 ft Molenaar, 195630 engine; 4 in, diameter; Rider, 19660.75 hp @ 1500 rpm65 engine ;1.1 hp10 30 engine4 in. diameter;@ 1900 rpm4 in. diameter;@ 2000 rpm;at 90’ to horizontalRider, 1966Rider, 19667 75. engine6 325 engine;4 hP4 in. diameter;@ 2000 rpm;at 45” to horizontalRider, 19666 in. diameter; Rider, 1966@ 1350 rpm