Posts by seaweed

    I say go custom with diveskin.net . You don't have to try it on to see if it fits because it was made for you. You can pick any color and style you want and best part is it costs as much or cheaper than most normal suits. In South Florida a 3mm wetsuit is enough but skinny guys might need 5mm.

    Nice space saving, be sure to add a vent and a fire extinguisher now.


    I didn't realize that you only had one side to walk on. Now the horizontal mounting makes sense. Just make sure they don't extend past the bladder or it will be a pain at the dock.

    Sweet ride Dan. Very clean and sharp looking boat.


    Make sure you have all the required safety gear.


    Hope to see you on the water.




    How many horses?

    Drag force is proportional to frontal area amongst other variables aswell.


    A wobbling shaft can increase it's frontal area many times thereby increasing drag many times.


    I think the effect of this makes all other effects very small or even negligible.


    Stiffening the shaft will improve this but will probably cause spears to snap in big fish.


    I think for slip tip use a very stiff spear will be beneficial.

    I only used the Heinrich when my line release broke.


    Line release is not hard at all to make on a gun with the right equipment.


    My mech came with an aluminum jig. The jig marks the beggining and end of mechanism for the slot, lets you drill the side holes perfectly and drill the release pin hole and cut the line release slot perfectly as well. All in all a great help to get it right the first time.

    It might be better to insert it to a piece of rubber, as if it were in use, and put it in seawater.


    The bands contain sulfur so that might hurry up results and be more realistic.

    Jeff's example he used a closed system (sealed pipe) and an open system (water coming into pipe). Kyle is talking about 2 closed systems.


    BF=V*rho(water)- m*g


    Buoyancy force= volume of body times density of water minus mass of body times accceleration due to gravity


    Bouyancy force is not the same for the bottles. Only the first term is the same in both cases, second term differs since the bottle with water has more mass.



    Things float due solely to buoyancy so it is the only determining factor.

    There is a plume of freshwater coming out of an outflow pipe here in Hollywood. If you ever wander into it on your dive you sink like a rock.


    Buoyancy force is the weight of the volume of water displaced minus the weight of the object like Jeff said.


    So in the case of a floating speargun the weight of the water it displaces is greater than it's own weight.


    Gun sinking past a certain depth can be due to the airspace between the handle and the plug as well as the muzzle and plug. If they flood as you descend it can change the buoyancy enough. Guns are close to neutral so any little airspace can change their characteristics.

    Look at the jack in the top left corner of the first pic, you can see the bite just above the anal fin. What's interesting is that the bite looks very small, whereas the shark looked big to me.


    I shot a yellow jack in the keys, they were about 18lbs, he holed up with my shaft and 5 big nurse sharks came with 2-3 reef sharks hovering around. They went at it for about 5 minutes until I had to go down and retrieve my shaft.


    Out came the fish intact, already gutted, they only ate the organs and the skinny belly meat flap. The rest of the fish was unharmed.



    I think they just open a tiny hole and try to suck out the guts. Like we do with mangoes.