Posted by bill in colo on December 30, 2012 at 09:54:44 from (75.107.0.53):
In Reply to: Kinda OT Irrigation posted by super99 on December 30, 2012 at 06:08:23:
I have a Greenfield mini pivot from Zimmactic 660' with a end gun. When my pivot is on the low side end is only 10' above the water source when it is 180 degrees it is 90+ feet above water source, my 20hp pump puts out about 235gpm @ 100psi. I have tight soil so i run Nelson rotators regulated to 12psi. Some towers climb up to 20% which is at design limit for 90' spans,I have 4 90's and 3 100,s I've run this system for 13 years. My pumping costs were at 90 per ton this year driest year that the pivot been in use. I will buy a full sized system next time, I've been around pivots long enough now to buy a used system. About 50% of the new systems here are T&L oil drives as very few rancher here are good at trouble shooting electrics.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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