the wooden plume was an open trough while the penstock was an enclosed metal pipe. water from the elevated plume would enter the penstock and descend to the turbine runner through wicket gates. the silo was used to absorb water shock in the event the wicket gates where close abruptly. the silo was void of water and served to provide a cushion of air to absorb the shock to protect the penstock and plume from the force of water reversing it direction. one such dam is still in operation on the ocoee river near cleveland, tn.
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Today's Featured Article - New Hitches For Your Old Tractor - by Chris Pratt. For this article, we are going to make the irrational and unlikely assumption that you purchased an older tractor that is in tip top shape and needs no immediate repairs other than an oil change and a good bath. To the newcomer planning to restore the machine, this means you have everything you need for the moment (something to sit in the shop and just look at for awhile while you read the books). To the newcomer that wants to get out and use the machine for field work, you may have already hit a major roadblock. That is the dreaded "proprietary hitch". With the exception of the
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