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Electronics Forum / Basics / July 2007What is the ball for ?
When I drive from state to state, I notice some balls hanging at above 100m above the ground, on the high voltage power cable between the towers. I can't figure out the reason for the use, as the balls would cause wind resistant, making the cable sway. wouldn't this cause some unnecessary technical problem ? can any members enlighten me on this ? Thanks Best Regards AFAIK, they help keep helicopters and planes from flying into the wires. They just make the wires more visible. > When I drive from state to state, I notice some balls hanging at above > 100m above the ground, on the high voltage power cable between the [quoted text clipped - 4 lines] > > Best Regards Yep, they are for wire visibility. There is often a landing strip near by. Helps aircraft pilots see the wires... On Sun, 22 Jul 2007 05:29:41 +0000, j67230 wrote: >> When I drive from state to state, I notice some balls hanging at above >> 100m above the ground, on the high voltage power cable between the [quoted text clipped - 7 lines] > Yep, they are for wire visibility. There is often a landing strip > near by. Helps aircraft pilots see the wires... And pilots who "crop dust" >> Yep, they are for wire visibility. There is often a landing strip >> near by. Helps aircraft pilots see the wires... > >And pilots who "crop dust" These are almost always found where the lines cross rivers and canyons, as air traffic will be more prevalent in those areas, and the lines tend to be at a higher elevation than the usual routing. Crop dusting is so prevalent that almost all transmission lines through cultivated land would have to be marked for that purpose, so I don't think that's a consideration. > When I drive from state to state, I notice some balls hanging at above > 100m above the ground, on the high voltage power cable between the towers. > I can't figure out the reason for the use, as the balls would cause wind > resistant, making the cable sway. wouldn't this cause some unnecessary > technical problem ? can any members enlighten me on this ? Thanks There's an airstrip nearby. The balls are so the pilots can see the lines so they don't crash into them. Cheers! Rich |
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