Arbor Harpoon

Therrin · 10th February 2008, 07:03 PM

Arbor Harpoon test video #1:
- 1/3 powder load, using only tissue for wadding. Very low pressure.
- Results : inadequate boost velocity. "works", just not well.

Arbor Harpoon test video #2:
- half powder load (5 grains), re-using plastic wad = moderate pressure.
- Results : sufficient boost velocity for small to medium applications

Steel building in test video is to give scale, and to prevent tangling and aiming problems for test purposes.

(note: field use has been attained, although circumstances and load parameters were unmeasured, and varried accordingly. Actual line placement at 75 foot has been achieved)

Ekka · 10th February 2008, 08:10 PM

LOL, you're onto something there but lets have some pics of the actual harpoon and perhaps we can make it fly better further etc.

And to think some-one called me a redneck!

JayD · 10th February 2008, 08:17 PM

LOL...Therrin...What a beuty...

Better wear a helmet with that bazooka.

Therrin · 10th February 2008, 08:55 PM

Ekka, the specifics can be found here:
12 guage Line Launcher

The distance has to do with powder load and pressure developed. I'm toying with the idea of using a full load, and just pouring the shot out without messing with the internal wads... hmmmm

we'll see =) Definitely a helmet, goggles, brick wall, etc, for that one! lol It'd make it sooo much easier though... no more messing around modifying loads.

10th February 2008, 07:03 PM	#1 (permalink)
Therrin The Tree World Bandit Join Date: Oct 2007 Location: Lancaster, Ca Posts: 1,254	Arbor Harpoon Arbor Harpoon test video #1: - 1/3 powder load, using only tissue for wadding. Very low pressure. - Results : inadequate boost velocity. "works", just not well. Arbor Harpoon test video #2: - half powder load (5 grains), re-using plastic wad = moderate pressure. - Results : sufficient boost velocity for small to medium applications Steel building in test video is to give scale, and to prevent tangling and aiming problems for test purposes. (note: field use has been attained, although circumstances and load parameters were unmeasured, and varried accordingly. Actual line placement at 75 foot has been achieved) __________________ Ken Fessia I.T.S.A. Tree Service (661) 916-4703 Last edited by Therrin : 11th February 2008 at 03:20 AM.

10th February 2008, 08:10 PM	#2 (permalink)
Ekka Eric Frei Administrator - Brisbane L5 (Dip) Hort Cert III Arb + some Join Date: Jan 2007 Location: Brisbane Posts: 6,869	Re: Arbor Harpoon LOL, you're onto something there but lets have some pics of the actual harpoon and perhaps we can make it fly better further etc. And to think some-one called me a redneck! __________________ Remember to use the "search" function, if you have answers/questions post them so everyone can benefit. Free Tree and Green Industry Link Directory Qualified Brisbane Tree Lopping Brisbane Tree Care, Consultations and Arborist Reports Forum Sponsors

10th February 2008, 08:17 PM	#3 (permalink)
JayD Over mature heritage tree Join Date: Feb 2007 Location: Sydney Posts: 886	Re: Arbor Harpoon LOL...Therrin...What a beuty...Better wear a helmet with that bazooka. __________________ Free Tree and Green Industry Link Directory

10th February 2008, 08:55 PM	#4 (permalink)
Therrin The Tree World Bandit Join Date: Oct 2007 Location: Lancaster, Ca Posts: 1,254	Re: Arbor Harpoon Ekka, the specifics can be found here: 12 guage Line Launcher The distance has to do with powder load and pressure developed. I'm toying with the idea of using a full load, and just pouring the shot out without messing with the internal wads... hmmmm we'll see =) Definitely a helmet, goggles, brick wall, etc, for that one! lol It'd make it sooo much easier though... no more messing around modifying loads. __________________ Ken Fessia I.T.S.A. Tree Service (661) 916-4703

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