[TowerTalk] Antenna launcher found

[Patrick Greenlee]

Be careful, be very careful. There is a reason PVC pipe is not allowed 
for distributing shop air.  People do it out of ignorance or because 
money means more than safety to them. Google to see some pix of what 
shrapnel damage from exploding PVC pipe can do. Because people aren't 
killed first time every time they pressure up PVC pipe doesn't mean it 
isn't dangerous.

I bought a tennis ball launcher as a birthday gift for a friend. If I 
recall correctly it is called a K-9 Kannon.  It is made of plastic and 
uses large rubber bands for launching the ball, ostensibly for a dog to 
retrieve, hence the name. There are several models ranging in cost from 
about $7.50 to $20.

Patrick        NJ5G


On 2/19/2017 10:42 PM, Mickey Baker wrote:
> Being the cheap ham that I am, I built one from the plans on that site, but
> a but a bit more robust.
>
> I can launch a standard new tennis ball 250 meters at a ground level target
> and much taller than anything around here. I have ropes in 70 foot pine
> trees supporting wire antennas.
>
> I hate the fishing reel that I'm using, so I should probably upgrade the
> reel.
>
> There's some margin for safety built in, but I wouldn't inflate more than
> the recommended pressure with a PVC pressure vessel. A failure could be
> dangerous.
>
> Be safe, a tennis ball could hurt someone!
>
> 73,
>
> Mickey N4MB
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