Coloured Balls

This comes under the category of useful information.  You never know when certain facts will come in handy.
Across the river in the Hutt Valley north of Wellington some power lines are strung.  On them are some large brightly coloured balls. these are not, as you might suppose, some form of colour therapy to ensure the health and fighting fitness of the trout in the Hutt river.
It is a little known fact that the vibrations in a helicopter make it physically impossible for even the sharpest eyes to focus on a horizontal line.  This makes the power lines invisible.  The balls provide a helicopter pilot with a means of spotting an area into which it would be inadviseable to fly.
I know that the lines are not really horizontal.  They are a catenary. but they are still invisible to helicopter pilots.  So if you happen to be flying a helicopter up the Valley, keep an eye out for coloured balls seemingly floating unsupported in mid air.  Don’t try to fly between them.
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About Alan

Alone in a sea of spinifex.
This entry was posted in Communication and language, Handy Hints, Humour, Life, don't talk to me about life!, News and politics, Science, Travel, Uncategorized. Bookmark the permalink.

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