Drag, the force that slows the spear down, is also proportional to the v^2.
That's correct for high speeds (and turbulent flow -> high Reynolds number) but at low speeds it's proportional to v...
I just tough I'd mention it so people don't get confused while calculating their diving drag <img src= " class="smiley" srcset="https://spearfishing.world/forum/images/smilies/emojione/1f606@2x.png 2x" height="23" width="23" loading="eager" data-tooltip="biggrin" aria-label="biggrin">
Great pictures!
The fin's brand is blurred 
was that for another forum :)?
If anyone wants a more technical explanation of why this happens PM me. Ill reply tomorrow after my last Final Exam.
Is it too hardcore to post?
I would suggest Giorgio Dapiran's videos!
He's a master....
Welcome David
Welcome. Thats a very cool video, I enjoyed it!
Thanks!
Is that last monster fish a Cobia?
The last fish is an amberjack...
Awesome!!
This is my first try at a spearfishing video so there's quite some things to improve.
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thanks
which spear is that in the vid?
Nothing, I just had something engraved on the plate.
Ok, thanks
I was think that it would be something technical
If it's an open track you can put a pin on top of the shaft near the mech (another use for the drilling jig) and rig a shaft line release.
Side note:
Dan, what's behind the SS plate on the gun's side (in the mech area)? thanks.
Display MorePersonally I was very hesitant to not have a safety on my custom gun. As a kid growing up using firearms we were always taught to keep the safety on whenever possible. They also told us never to trust a safety calling it the "dummy" switch but we used it regardless.
Needless to say nearly every gun I had ever handled had a safety until I made a speargun. At first I was a little uncomfortable. It was always a feature that you dont really use but is nice to have. On my riffe the only time I ever noticed the safety was when aiming at a fish and pulling the trigger only to find out its on safe. Ive since gotten used to not having a safety on the gun and I havent had any misfires or accidents. Knock on wood.
Despite all this there are at least a couple reasons why I like safeties on some of the guns I own. I never allow a loaded gun on the boat but I do feel a little better when loading a gun if the safety is on. Another instance where they are nice to have is when you or your dive buddy passes you their gun or vise a versa so they/you can have their hands free. I trust myself not to pull the trigger but sh@t happens. And possibly the my biggest reason for wanting a safety on a gun is for when I have less experienced friends/family using equipment. All of us on the forum have enough time in the water to control themselves but not everyone is trustworthy with a loaded weapon. Again sh@t happens.
Bottom line, it comes down to whoever is operating the gun. Personally I trust myself not to pull the trigger but the same cant be said of everyone in the water. And honestly, all the fish you fish you ever missed arent worth the damage that can be caused by an accident.
Sh@t happens a lot more when people have a false sense of security!
What the "safety" can do to to give (as mentioned) a false sense of total control and to jam the trigger and make you miss that shot! Is has happen to me more then once, in the past. Serious gun's don't have the "safety"... (but I understand your POV Dan, as a business owner)
Altough with "only" 3 fish, this one is more impressive...
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Dan's shafts have the fins really far back already, but I love how low profile these are, less drag.
the SA shafts on the online store (there might be some not listed there) only have notches and not as far back as these....
But never mind me as I'm not going to get spear from the US (shipping+customs)
I can have the shafts made in that configuration. What are the advantages?
More band strech... You can have the band strech equivalent of a bigger gun in a smaller gun
(that's my interest in it...)
looks great!
What brand are those spring steel spears?
Good looking gun!
Why are the wishbones so long?
I'd prefer that it automatically display the surface interval too, but I really don't miss it that much (especially considering the price of the watch.) I just "listen to my body" to sense when I'm relaxed enough for my next dive. If I'm doing deep dives (for me that's ~70-100') then I give myself ~5 min. surface interval. The watch has a countdown timer, but I haven't messed with that.
Your body will lie if there's some fish action down there
