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75x105 fletching offsets
Does anyone know the reasoning behind the 4 fletch 75 by 105 degree offsets on the Bitz jig? Never used it before and wondered why it is even there.
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RE: 75x105 fletching offsets
Not sure, but is it for flu flu?
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RE: 75x105 fletching offsets
Possibly for better clearance on a certain type of rest? Not sure here.
Chad |
RE: 75x105 fletching offsets
It's for 4 fletch. Some ppl prefer 4 fletch over 3. I sold several doz arrows fletched like this & even tried it a couple times several yrs back, using 4 - 4" fletches, but couldn't see much difference (other than being able to nock arrows either side up) so went back to 3 - 5" or 5.5" for most of my arrows.
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RE: 75x105 fletching offsets
Yeah Vic, but there are 2 different 4-fletch settings--the 90 x 180 degree, and the 75 x 105. The latter looks kinda funky. The 90 x 180 looks like X, and the 75 x 105 looks something like ><. Bound to have been a special purpose for it.
Chad |
RE: 75x105 fletching offsets
arrows by kelly's web page has a great article referencing just this. Check it out.
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RE: 75x105 fletching offsets
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RE: 75x105 fletching offsets
Re: Your original question of what the 75X105 is for, it's mostly for guys shooting compounds, releases and lizard tongue rests. They do it to get better fletch clearance with the flatter angle. 150 degrees between fletches vs only 120 degrees between them (3-fletch) or with the 90 degree 4-fletch.
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RE: 75x105 fletching offsets
Re: Your original question of what the 75X105 is for, it's mostly for guys shooting compounds, releases and lizard tongue rests. They do it to get better fletch clearance with the flatter angle. 150 degrees between fletches vs only 120 degrees between them (3-fletch) or with the 90 degree 4-fletch. |
RE: 75x105 fletching offsets
Nope. You only have 120 degrees between each fletch with a 3-fletch. With two fletches set at 75 degrees, you wind up with an included angle of 150 degrees, top and/or bottom. 30 degrees MORE clearance. Of course that puts the other two fletches with only 30 degrees between them, so that's why they're set perpendicular to the string. If you can't visualize it in your head, I'll borrow the example LBR used above. It's almost exactly the same angles I'm talking about.
>< |
RE: 75x105 fletching offsets
I currently shoot arrows with 75 105 left wing helical 4" fletching, and I have no idea what the advantage is over 90 degrees. The bowyer who made my bow had arrows fletched as such and they flew excellent paper tuning very easily so I stuck with them.
Jim |
RE: 75x105 fletching offsets
Nope. You only have 120 degrees between each fletch with a 3-fletch. With two fletches set at 75 degrees, you wind up with an included angle of 150 degrees, top and/or bottom. 30 degrees MORE clearance. Of course that puts the other two fletches with only 30 degrees between them, so that's why they're set perpendicular to the string. If you can't visualize it in your head, I'll borrow the example LBR used above. It's almost exactly the same angles I'm talking about. >< From your example, the angle created at your less then, and greater then symbol would be 75 degrees, the angle from created at the top and bottom would be 105 degrees. 75+75+105+105=360. 105 would be less then 120, so I would assume you would get better clearance from the 3 fletched 120 degree arrow. Please explain how you get to 360 degrees from your example. I think that would clear things up for me. Bob |
RE: 75x105 fletching offsets
Bob, I don't think I can do any better job of explaining it than I did in my last post. I'd suggest fletching one up at 75X105 and comparing it to one of your 3-fletch arrows.[&:]
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