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 <pete.n4zr@gmail.com> 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)
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