Posts by Toledo

Quote from Tin Man

As Davie noted in his calcs, it's pretty small.

If we had a band slot 1" below the shaft, and the bands were stretched 40", then the angle would be about 1.4°. If we had a 200 lb band load, then the vertical component would be 200 x Sin(1.4°) = 5 lbs.

But here's the part that has always confused me. That small vertical force only serves to pull the shaft and stock together. Whatever force is pulling the stock up, is exactly the same as the force pulling the shaft down. They are already touching, so one cannot be pulled closer to the other. So I don't understand how the vertical component of the band force can generate muzzle jump, even if this component were large.

I can see it if this were an old style gun where the spear were unsupported over much of its length, because then there can be relative motion between the shaft and stock. But that's not the case for most guns.

In my head, it has always seemed that muzzle jump had more to do with the way the recoil force acted about 1) the grip, and 2) the gun's center of mass. Davie points out that the mass of the gun is small compared to the mass of the diver, so it would seem that the height of the grip would dominate. If you follow Davie's analysis a little further, it may even reach the theoretical conclusion that you could reduce muzzle jump by LOWERING the band slot, to put it inline with the grip?

It seems to me that if the Band Slot, grip, and Center of Mass of the gun were all in line, then you should have no muzzle jump. I have wondered if the way the bands jump around at the end of their contraction could somehow cause the muzzle to move. But I don't know how this would be different for inline versus normal bands.

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Jeff,
I follow what you're saying but the fact that the bands are stationary on one end confuses me a bit. If the bands were being released from both ends then the force would be equal, but it isn't. When the bands are released the center point of the bands(contraction) continues to change(forward) until the shaft is released. Even after this occurs the bands will contract further than their resting state and then come to a rest. Maybe this is the point that you are talking about. When the bands ends actually push away from their center instead of toward one another.
One more thing ,the holes in comparison to handle does make sense. Interesting to say the least.

Great vid, and great fishing. :thumbsup2:

Seems like you don't have to go that far...:D

:thumbsup2::agree1:

Welcome.:thumbsup2: Where do you dive out of?

http://www.youtube.com/watch?v=Ua5BdU83K7k
http://www.youtube.com/watch?v=ke0SINqsAXU

I've seen his guns. I just feel they are more of a hybrid than a true "WOOD" gun.

Either that, or they don't have hands available to type:D

Would you consider your Tito gun a "Wood Gun", or a Hybrid?

Thank you for the info.:thumbsup2:

Welcome.

Tinu,
I've always wanted to go to the Azore's. I saw some of your other spearfishing vids there. Can you tell us a little about the fishing there and also about the fish species?

Now that's a thought. How about a Porn Flick depicting "El Che" as a male porn star early in his career. The movie could be called "El Che La Metio"......

Quote from Rolo

Yes, ignorance is ubiquitous.

Well said Rolo.. You should come to Cali and see how many people wear the Che T-shirts, or have the bumber stickers.

Welcome..

:thumbsup2: Great catch.

:thumbsup2: Great day. Looks like a big black margate to me too.

Quote from Tin Man

Do you mean making the inside form out of some other material instead of wax? No, I havent tried anything besides the syntactic form. For a straight cylinder, like this sample, that might work quite well.

The real advantage to something like lost wax, I think, is that the shape is only limited by your imagination. If you want to make it thicker in the middle (like some of the elaborate CF euro guns) then you can do so without regard to whether the inside form can be withdrawn. You could just as easily start with a 2" by 2" by 60" block of wax, and carve the most elaborate shape you could think of. As long as the wax has a way out.

I totally agree, with a shape that has more elaborate contours something like this would be needed.
I know you said KISS but two things that come to mind are: an inflatable form to put the CF around, or just making a thin innercore out of 2 parts(same mold) gluing together and laying the rest on top of that. Why would it matter if the thinnest inner most part was originally 2 pieces?

What other methods have you tried for the tooling/mold. Have you tried a tooling made in 2 parts(connected in the middle) with mold release/wax etc..?

Greek, sweet gun. You and Memo been talking?

I wonder in what holes the Iodine/baking Soda mixture was truly being used.:D