My brother and I have been trying to figure out an easier way to get lines over tree branches. We’ve made a few prototype line launchers that use a spring to shoot a small weight with a fishing line attached. Once over a tree branch, the fishing line is used to pull up a heavier line.
The prototypes work well. It’s easier and faster than trying to manually throw a rock. The amount that the spring is compressed is adjustable, so you can use a lower setting for lower branches and a higher setting for higher branches.
The launcher resembles a dart gun. A short stick is used to cock the spring. This is what it looks like:


The total carry weight would be under 3 ounces, and perhaps just under 2 ounces. The prototypes are aluminum, but we might use other materials, such as plastic or magnesium, if we start producing these.
So far we’ve been making these one at a time on an old Bridgeport vertical milling machine. That’s not a practical way to manufacture them. So, if we want to manufacture these we would have to make a serious investment in tooling. Before we spend a lot of money, we want to know if there would be any demand for this device. We have applied for a patent, so we are prepared to proceed if there is a market.
So, would you consider using a bear bag line launcher while backpacking?
Yes, probably,
Maybe, or
No?
Thanks! Any comments are welcome.


