Direct support and general support maintenance repair parts and special tools list (including depot maintenance repair parts and special tools) for angle drive, cooling fan (2990-00-712-1280), gearcase, transfer (2520-01-061-5570, 2520-01-047-8613, P/N 12313144 (19207), P/N 12323520 (19207), transmission, transfer (2520-00-572-8605, 2520-00-800-3405 ...

Includes index.

Fan's looking through Ferry Field gate

[side gate off State Street]

Postcard, UM Football, Player and Female fan on M banner

[printed by Souvenir Postcard Co., New York]

Postcard, Female Football Fan Sitting on UM Seal

[printed by Raphael Tuck and Sons, "University Girls" Series, of postcards. No. 2626, Art Publishers to the King and Queen. Chromographed in Berlin]

Series of articles on compressor and fan design written by German engineers.

Composed primarily of articles written by Bruno Eckert's group, Forschungsinstitut für Kraftfahrwesen und Fahrzeugmotoren, Technische Hochschule, Stuttgard. Translated by various groups and individuals both in and out of the Navy Dept. Preliminary translation done by German prisoners of war.

Hydrogeologic facies characterization of an alluvial fan near Fresno, California, using geophysical techniques /

Mode of access: Internet.

Energy saving and solar electricity in fan-ventilated greenhouses

Greenhouse cultivation is an energy intensive process therefore it is worthwhile to introduce energy saving measures and alternative energy sources. Here we show that there is scope for energy saving in fan ventilated greenhouses. Measurements of electricity usage as a function of fan speed have been performed for two models of 1.25 m diameter greenhouse fans and compared to theoretical values. Reducing the speed can cut the energy usage per volume of air moved by more than 70%. To minimize the capital cost of low-speed operation, a cooled greenhouse has been built in which the fan speed responds to sunlight such that full speed is reached only around noon. The energy saving is about 40% compared to constant speed operation. Direct operation of fans from solar-photovoltaic modules is also viable as shown from experiments with a fan driven by a brushless DC motor. On comparing the Net Present Value costs of the different systems over a 10 year amortization period (with and without a carbon tax to represent environmental costs) we find that sunlight-controlled system saves money under all assumptions about taxation and discount rates. The solar-powered system, however, is only profitable for very low discount rates, due to the high initial capital costs. Nonetheless this system could be of interest for its reliability in developing countries where mains electricity is intermittent. We recommend that greenhouse fan manufacturers improve the availability of energy-saving designs such as those described here.