Posted by JerryS on September 05, 2014 at 23:16:12 from (98.80.118.71):
In anticipation of the next major ice storm (which we know is coming, since it has been several years since the last one) the electric co-op in my area has been making a determined effort to get all its ROWs—transmission lines and residential service lines--cleared of overhanging limbs. The co-op’s major tool in this effort is this tracked, telescoping pole, which can extend a circular saw blade for about 50 feet in all directions. It trims limbs with ease. It can also top trees with an angled cut. Strangely, to make an angled cut the cutting head does not pivot; instead, the entire boom operator’s cab tilts, with the result that the operator has to do some serious cheek-gripping to stay in his seat. In these photos, the saw is lopping and dropping limbs around my house. The operator, apparently a “guest worker”, maneuvers this pole with as much ease as he can use his own arm. He works inches away from the power lines (me, I’d have sparking lines laying down everywhere), without mishap. If a limb should lodge on the line he can flick it away as easily as thumping a bug off his shoulder. As a result of his skill, the crew can clear a lot of line in a short period of time.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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