For those who can’t understand my English, I include a written transcript of what I said. You could use Google translate, or something similar, to make it understandable. “Today I want to talk about ballasting and balancing. When I use the word “ballasting”, I’m talking about adding weight to a speargun to control its overall buoyancy That is, to determine whether it floats or sinks. When I talk about “balancing” I’m talking about how the speargun sits when free in the water : does the front end droop forward, does the speargun stay level or does the gun sit with butt down? Does ballasting, or balancing, matter? A gun that is ballasted close to neutral bouyancy is easier to carry and easier to aim, especially with your arm extended. A gun that is ballasted to have a slight negative bouyancy will sink, making it easier to find if it’s let go A gun that is slightly nose-heavy gives “proprioceptive” cues , improving intuitive aiming A gun that comes to rest with the tip pointing down is safer I’ve yet to find out a way to determine the right amount of ballast, and where it should be placed, in the workshop. I have to take the gun to a local tide pool and work it out, by hand, and in seawater To do this, the speargun needed to be sealed to prevent water seeping into the timber. It also needed to be fully assembled, with the floating and sinking bits arranged as they would be when it will be on the hunt. I have a collection of sample weights, each one twice the weight of the next smaller. I put the gun in the water and added weights till it just sank. Then I moved the position of the weights till the tip just started to drop. I noted the number and mass of the weights, as well as their position, then I took it back to the workshop. Once the gun had been washed and dried, cavities were excavated in the stock, and the appropriate amount of lead was inserted. The lead was embedded in the pockets with clear casting resin. When the resin had set, I sanded it flat with 80 grit sandpaper. The gun was now ready for varnishing and finishing.”
@ivastabile
Ай бұрын
Muito criativo esses contra peso. Show!!!
@diyspeargunner2386
Ай бұрын
I plan to do a video on making ballast weights : soon I hope. I cast the lead in silicon moulds created for ice cubes. You can purchase them on eBay. The silicon just resists the heat of molten lead
@ivastabile
Ай бұрын
@@diyspeargunner2386 I'll be waiting for your post, I hope you have time to do it
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