Drag Race Spearfishing

[junior]

I responded to a thread posted by IyaDiver yesterday and it got me to thinking about a method to slow down large fish with a modified sea anchor instead of a buoy. Call me crazy, but see what ya think.

This application would be used for a reel gun, or possibly a line gun that would allow the line to detach once the shaft left the gun. Semi-freeshaft I guess.

Mount an eight-inch section of 2" PVC to the bottom of the handle. For a reel gun, make the wraps from the slide mechanism as normal, but the final wrap would lead into the PVC. Inside the PVC, stuff a sea anchor of appropriate size with the flared end facing towards the front of the gun. The line that leads from the shaft attaches to the sea anchor and a line from the back of the sea anchor then attaches to the reel.

It goes like this...you shoot the big ass fish and the shaft peels off the first few wraps to allow for distance and penetration. Once the fish is on, it takes off running and pulls the sea anchor from the PVC tube. The sea anchor deploys and all of a sudden the brakes come on and that fish feels like a dragster at the end of the strip. If you've got a reel, attach a line from the rear of the sea anchor to the reel line and allow the fish to run so that the anchor stays open. When the fish is tired out, reel him in and the anchor closes up, if he comes back to life, the anchor opens back up. With a semi-freeshaft setup, the sea anchor is the end of the line and nobody is running off with your shaft in a hurry attached to a parachute.

Alright, do I need to keep my day job or what???

:cool:

[kitefisherman]

Sounds like it would best for open and deep water pelagics. I guess that you would have to experiment with the size of the sea anchor because if it were too big, fish might have a tendency to tear off. You would also have to mount your PVC pipe so that it did not interfere with the wraps of line coming off your gun when you shoot. Interesting idea.

[IyaDiver]

Sweet one junior !!!!!!!

In powerboats, the formula in general is like this :
To double the speed, you need quadraple power.

I don't know if it applies to parachute underwater (sea-anchor). If I start with a 22 pound equivalent drag from a sea-anchor rated at 10MPH fish speed, will that same chute offer 88 pound drag at 20MPH? Let me do some research on the net. Will get back to you.

If I do that parachute thing, I will use a breakaway and the C02 underwater float or else I will loose the fish. I am still looking for a manufacturer that can build me a 15 liter float CO2 powered and can be pumped to 75 psi. With 75psi or 5 ATM, this guarantee the float will maintain its volume at 140 feet (4.6ATM). Since flotation quality comes from total air volume, I need to keep the float as fat as possible even in the deep.

The 88# tuna I landed weighs like shit when dead, a 15 liter float will be able to surface decent size fish when used with breakaway shooting system and that parachute.

Indeed if the tuna swam into the rocks, the parachute must be made very tough. I think 1000 denier Codura or Ballistic cloth is the minimum way to go and use 1000# Kevlar as line where required.

IYA

[junior]

Good luck Iya. I don't know much about the math required to figure out the drag other than such math must exist. I'll ask my wife. She has aced every math course on the planet:cool:

[keyspearfisher]

The parachute idea has already been done! It was on Jack prodo..(can't remember last name) super tuna gun. Nice peice of engineering. I think it is on rocknfish website. Made for huge pelagics.
http://www.rocknfish.com/Jack%27s_Tuna_Gun.html

[junior]

Pretty cool stuff. Thanks keys.

[esmiami]

I've been working on this for a while. A sailboat snap shackle is used for the line release. A 68gm Leland CO2 cartridge is used for inflation (20 lbs lift at 100 ft.), I might use 2 cartridges. A Halkey Roberts breakaway inflator mechanism is used. Carter liftbags is going to custom make me a combination liftbag/drogue chute. It is a square pillow bag with lanyards at the 4 corners and an area in the center that is heat sealed to form a square doughnut. It will fit into a 3” PVC tube mounted on the side of a Riffe gun with an ice pick tip.
You shoot the fish, if it’s small enough to deal with, you deal with it, if it’s too big to deal with, you pull on the snap shackle and it releases the bag. I have tested it on dry land with a regular self inflating Carter bag, seems to work so far. Should have it in the water soon.

[fishkilla]

i've found if you just stay in the boat and throw dynamite in the water you then only have to scoop up yer prize with a long handled net. it's much easier this way and you don't have to worry about mounting pvc on yer gun.

[richhermes]

Originally posted by fishkilla
i've found if you just stay in the boat and throw dynamite in the water you then only have to scoop up yer prize with a long handled net. it's much easier this way and you don't have to worry about mounting pvc on yer gun.

Hector brought along some really nice grenades on the last grounds trip that would have really stirred up the fish and we would have stayed dry.

Too bad they were training rounds.

[junior]

Does Hector have access to depth charges for reaching some of those deeper pelagics?

Redneck fishin' at it's best. How about running some electrical wire down and hooking it up to a generator? A little shock therapy for those holed up gags. And best of all, this would provide a force field around a diver guranteed to prevent the loss of teeth:D

[IyaDiver]

Hi Esmiami,

Can I have the email of Carter bag and the person I should talk to there. Thanks.

Do you know what pressure is your float working at when fully filled and at the surface and what pressure it can withstand. Any special pressure relief valve ?

Last question, how much is a 68 gram C02 cartridge in ur area ? At the time being even my 16gram C02 cartridge need to be imported from the USA.

Thanks Again.





JUNIOR,

I have been peeking at sea anchors manufacturer. There is one model with 2 feet wide chute called Sea-Brake and goes for US$109, weight 3 pound. Must be super tough material, something this small weighing that much. This is the smallest they have. With a chute and a CO2 float, my gun will weight and look like Terminator 2.... :D :D. Sure better than dragging 200 feet of float line, I hope.

[fishkilla]

yeah i'm all for being sporting but when it's almost time to steam back home and your limits are not filled then it's time to pull out all the stops. a couple of homemade bundles of c4 and boooooommmmm.... oh look i have my 10 gags and 20 snaps with a few peligics to boot. score one for the rednecks.

[junior]

Iya,
Check the link that keyspearfisher posted on this thread that has to do with the parachute. That is one terminator looking gun:cool: