Posts by Guest

    I'll have to wait for Dan's donated Riffe stock to arrive so that I can confirm the fit, but here's what I have so far. The Hogue isn't my favorit AR-15 grip, but it definately directs the hand higher up against the stock than does the standard Riffe handle.



    I am definitely planning on focusing on my education. But at the same time, like many of you, I can't stand to be away from the water. The water, fishing, and spearfishing are part of who I am and I get super cranky and agitated when I can't spear! lol. Besides, its a great study break!


    Jason- thanks for the offer, I might have to take u up on that.

    I have been playing around and building a prototype handle that fits the Riffe Competition series guns, but will accept an AR-15 handle grip. If I don't screw it up, I should be done in a day or two.


    Problem is, I don't have a Riffe gun to try it on. Would anyone be willing to test fit it, and try it out a little?


    I'll ship you the handle, and two grips to try (Hogue and A2). I would ask that you take a bunch of pictures, particularly of any areas that don't fit quite right, or could be improved in any way. The handle is aluminum, so I am particularly interested in if (or how badly) it affects balance. If this looks like something with potential, then I would need the handle back, so that I can make changes and have it as a reference for building more. I would of course pay for return shipping as well.


    So I'm basically looking for someone with an eye for detail, who dives often, and doesn't particularly like the regular Riffe handle.


    Anybody?

    All the former French, British and Dutch islands are a no go for spearing.


    Try to stay in the states, you'll get much better residencies once you graduate and not loose a year in the transition.


    Yea that's what i'm aiming for. The Caribbean is really just a backup plan. I just dont know if I could be stuck on a caribbean island and NOT be able to spearfish!!! lol

    I'm looking at medical schools in the Caribbean. The four best schools are on the following islands: Grenada, Saba, St. Maarten, and Dominica.


    How is the spearfishing there? I know Tinu, posts about Trinidad and Tobago often, but I know that we have quite a following of international spearos on this site.


    Any info is appreciated.

    Friday, I went out to the bluewater to try and find some wahoo and dolphin. The water was flat calm and we found some floating logs and stuff in 400ft, trolled that for a little bit, and didnt see much. Ended up running from spot to spot for a good 2 hours until we stumbled upon a floating papaya tree in 600ft. I jumped in on that and the guys in the boat started throwing chum. Out of no where as usual, the dolphin show up and I was only able to tag two before they dissappeared. Conditions were deteriorating as we on that spot and we had to turn back in.


    Saturday, went out with some newbies to try and show them what "real" spearfishing is. Successfully got my buddy his first hog and I found this guy on a sweet spot that Hau hooked me up with! Viz both days were absolutely amazing! We could see the ledge as we were anchoring!







    5/8" solid rod weighs about 2.2 lbs for a 72" long piece, and has a relative stiffness of 0.152.


    3/4" OD tube with a 1/16" wall weighs 0.97 lbs for a 72" piece, and has a relative stiffness of 0.163.


    You got it. The 3/4" tube is a hair stiffer, and less than half the weight. Chad and I (well mostly Chad) have been playing with some blue water pole spear designs. After testing the 3/4" prototype, we redesigned it to be 5/8" OD. That seems to be where many of them (like the Odor) end up.

    OK is rod or tube stiffer??? I always thought tube was stiffer but maybe im wrong. My Odor is 5/8" rod, my next project will be 1/2" tube with a .120 wall (almost 1/8") again. its about a pound lighter as far as the material goes, but I don't know if it will be rigid enough to use my 1/2" OD band.


    Solid rod is stiffer IF it has the same diameter as the hollow tube. Here are some comparisions.


    Your 5/8" solid Odor spear weighs about 0.37 lbs per foot. It has no ID, so the stiffness is proportional to:
    (.625 x .625 x. 625 x. 625) = 0.152


    Your 1/2" OD tube, with a 1/4" ID weighs 0.24 lbs per foot, and the stiffness is proportional to:
    (.5 x .5 x .5 x .5) - (.25 x .25 x .25 x .25) = 0.058


    So the Odor spear is 0.152 / 0.058 = 2.6 times stiffer than the 1/2" hollow tube.


    Let's say that you used 5/8" OD tube, with just 1/16" wall thickness. This would weigh 0.13 lbs per foot, and the stiffness is proportional to: (.625 x .625 x .625 x .625) - (.5 x .5 x .5 x .5) = 0.09


    So you can see that the 5/8" hollow tube is half the weight of the the 1/2" heavy wall tube, but still 1.5 times as stiff.

    Jeff please feel free to give me the old "I told you so" haha


    :) No way. I really wanted it to work out.



    If you are going to make the aluminum tube one continuous piece, and you don't intend to get nuts with really heavy bands, then yes, i think that it will probably be strong enough. And you have exactly the right idea by "counter drilling" a little to leave the stainless at the full diameter, and then starting the threads a little deeper.


    For what it's worth, and at the risk of letting the inner nerd out, the stiffness of a round tube is proportional to: OD (to the fourth power) - ID (to the fourth power). So if you wanted to compare the stiffness of 5/8" solid rod to 1/2" solid rod (of the same material), for example, then the ratio would be:


    (.625 x .625 x .625 x .625) / (.5 x .5 x .5 x .5) which equals 2.44 . So the 5/8" rod is 2.44 times as stiff as the 1/2" rod.


    The reason I say this is to emphasize that a small change in diameter can pay big dividends in stiffness. A 5/8" tube can have a thinner wall and be the same weight as a 1/2" tube, but the 5/8" will still be much stiffer.