Ran into this on a Ham Radio site. A version of a potato gun.
http://joplin-arc.org/antenna-launchers/
Antenna Launchers
The JARC Antenna Launcher Kit as featured in CQ Magazine.
Our antenna launcher kit lets you build an easy-to-use launcher
The antenna launcher uses air pressure to propel a mono-filament fishing
line, which you can then use to pull a heavier rope up over the tree.
video of launcher in action:
video of assembly and use:
-----------------------------------
Boy, can I see all kinds of uses at a GTG. Need dto rig up a backpack air tank to recharge. One might even use it to get a rope over a tree!
$50 for the kit or build your own for way less. Suppossedly the valve that
comes with the kit operates easier than the rgular ones from plumbing.
http://joplin-arc.org/antenna-launchers/
Antenna Launchers
The JARC Antenna Launcher Kit as featured in CQ Magazine.
Our antenna launcher kit lets you build an easy-to-use launcher
The antenna launcher uses air pressure to propel a mono-filament fishing
line, which you can then use to pull a heavier rope up over the tree.
video of launcher in action:
video of assembly and use:
-----------------------------------
Boy, can I see all kinds of uses at a GTG. Need dto rig up a backpack air tank to recharge. One might even use it to get a rope over a tree!
$50 for the kit or build your own for way less. Suppossedly the valve that
comes with the kit operates easier than the rgular ones from plumbing.