MICROFICHE REFERENCE LIBFUUW - Cd3wd.com

here, the circular mot is usually limited to S-15 foot lifts, with capac-ities of around 800 cfh. This data is reported by Molenaar using 16 gallonbuckets. However, by utilizing additional pulleys and longer ropes, liftsof 30 feet with dischargesof 250 cfh have been accomplished using 12 gallonbuckets.Adjusting cost estimates reported by Molenaar in 1956, the initialcost of a mot (including rope, pulleys, trough, supports, bucket, andinstallation) would be about $50.00, with repair costs of a few dollars ayear. Of course, the cost of animals and the land needed to grow feed forthe animal (multiplied by the percentage of time for water lifting) mustalso be included in initial costs. In addition, the cost of feed or loss ofproduction of the land must be considered in the operating cost.3.2.1.4 Bucket, Rope, and Windlass (Crank)As with the use of multiple pulleys, the windlass or crank providesmechanical advantage to allow increased capacity (load) of a bucket and rope.Many variations of the windlass are possible, including combinations withpulleys, gears, treadmills, etc. The most commonly used modification is theutilization of two buckets attached to opposite ends of the same rope whichis wrapped around the windlass roller. In this way, the buckets counterbalanceeach other and the BHP must only balance the water weight and friction.The use of these additional devices, such as gears, rollers, and pulleys,can significantly increase the efficiency of the windlass by decreasing theneeded BHP . The use of low friction losses. No data appears availableon the performance and cost of this simple lifter.Costs throughout this paper have been adjusted to 1975 United Statesof America Dollars.