I’ve seen people using a mini crossbow with the head removed from the bolt and replaced with a golf ball. It is extremely accurate.
73, Bill WE5P Comfortably Numb > On Sep 28, 2021, at 14:54, Pete Smith N4ZR <[email protected]> wrote: > > FWIW, the only thing that would concern me about that sort of solution is > the projectile, and its potential for damage if it should hit someone (or > something). I personally prefer the tennis-ball cannon (antennalauncher.com) > for that reason. > > 73, Pete N4ZR > Check out the new Reverse Beacon Network > web server at <http://beta.reversebeacon.net>. > For spots, please use your favorite > "retail" DX cluster. > >> On 9/28/2021 1:58 PM, Michael Fischer wrote: >> Stan - LOVE "just my 2Hz worth" stealing that from you om! >> >> First of all thank you to each one of you who have contributed your thoughts >> particularly around the mechanical considerations for suspending the InvL, >> You guys are great teachers. Says the guy whose dad was the ME in the family >> and raised a son who had a tough time with math so he went into sales... I >> am grateful for the grace you guys have for those of us to whom engineering >> does NOT come naturally.. >> >> FWIW, my weapon of choice for the past several years for launching lines >> over very high tree limbs has been the PVC cannon discussed in QST some >> number of years ago. My only changes to the design have been (1) to fill the >> projectile (also made from PVC) with lead fishing weights, initially so it >> could pull the monofilament I was using as a tag line back down the other >> side of the Douglas Firs which present a lot of friction. >> >> I learned that (2), braided fishing line is lighter, tangles far less ( limp >> by nature), weighs much less and therefor can be shot much higher, presents >> less friction over the branch (almost guaranteeing you can get it to drop >> back to earth) and is much stronger as a tag line for pulling the heavier >> rope or paracord etc back over the branch ( that you ultimately use for >> suspending the antenna). >> >> The PVC cannon is very accurate and I often get compliments from people >> about being able to choose the branch and put it exactly where I want it. >> Its' a great tool. I can comfortably shoot the projectile over 125' with >> approximately 90PSI in the cannon >> >> Hope this helps someone.. >> >> 73, >> Mike >> K7XH (forever a TB newb) >> _________________ >> Searchable Archives: http://www.contesting.com/_topband - Topband Reflector > _________________ > Searchable Archives: http://www.contesting.com/_topband - Topband Reflector _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
