Sharked Kayak Trailer




About: I made a beer mug with only a knife & a hatchet. I think that says a lot about me.

Everybody who likes kayak fishing must have the same big problem: STORAGE.
What to do with the caught fish?
Where to stock rescue stuff, fishing gear & fishing beer?

Just put & fix & wrap it on the kayak? Yeah right. It's a kayak, not a carrier!
Use the kayak's trap? Yeah..., even my drinking bottle doesn't fit in!

And what to do with other fishermen? Everytime I'm on a good spot others come disturbing my karma.
I tried the angry russian accent. They answered with the horn.
I tried the crossbow. They answered with the water canon.

So I taught: why not storing my stuff OUTSIDE the kayak?! Why not carrying it all like a sled?
Inspired by one of my favourite pictures ever - you'll agree - the idea was born to build an insubmersible container.

The yakproof way (or how marrying practicalness & crazyness)

- some Alubond-style aluminium composite panels
- some big pvc-pipe
- screws, glue & duct tape

Step 1: Sharky's Fin

Tape two pieces of alubond together with duct tape.
Design the fin. Mine's more than 3 feet at the base, corresponding to a shark of about 33 feet (same as the biggest shark ever caught, in Iceland).

Cut it out with a circular saw to obtain two the same fins (to cut it out correctly without scattering: put a piece of plywood under the panels).
Round the edges.
Drill tenthousand holes in the sides - no more no less.
Glue a piece of small diameter pvc-pipe between them, on the place of the joint.
Prepare some polyester-rope.
Glue the edges.
'Sew' the sides together.
Rivet the four prepared 'L'-alu-pieces aka fixations to the body you'll build later.
Foam the inside.
Duct tape the whole.
Ready for assembling!

Step 2: Sharky's Keel

The fin is quite heavy, so a counterweight in form of a keel is needed.
Same concept, different assembling.
No sewing, just a piece of small alu-pipe and a lot of auto-drilling screws.
Rivet the same L-pieces on the upside.
Add two round-shaped profiles on the downside (those will be used fo a lead-filled pipe).
Add a steel bar in the inside - air is out, weight is in.
Foam the space left on the inside.
Powertape the outside.
Ready for assembling!

Step 3: Sharky's Body

Just a 7inch piece of pvc-pipe & two covers, glued together with pvc-cement (that's a huge amount of storage space!).

Step 4: Drill & Screw

Use no plates, but alu rods in the inside of the tube for more yakproofness.
Pre-drill the rods, insert screws, tape together, put the rods in place in the inside of the tube, bolt them on the outside and srew finn & keel in place.
Easy to mantle, easy to dismantle.

Step 5: Put on That Weight

Never said it would be a goldfish. Add weight to the keel for more stability.
Just another tube, filled with lead. Lots of lead.

Step 6: Shark You Go

An then, one summer morning, time for sharky's first swim.
There was some wind.
His belly was empty (and thus filled with air).
And so he bumped like a wild horse in a bee swarm.

Not exactly the right behaviour of a kayak container.

So time for some recommendations:
- his belly needs more weight to get it all stable: gear, crushed ice, beer, whatever
- the fin is - definitely - a bit too large (too much weight and too much wind capture)

More weight means more power needed to get the kayak moving.
So I think I'll make a smaller fin. Half as big will still be impressive - it will still keep other fishermen away from my fishing ground, whooha!

This one will be mounted on my car, probably...

- we need a lighter fin
- we also need a more 'aquadynamic nose' to led it flow more smoothly to the water
- AND I'll fix at least two traps on the upper side of the body for more accessibility

Thanx you folks for whatching!



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    19 Discussions


    4 years ago on Introduction

    Be careful, for the world we live in, this just might be Terrorism. On a side note, you know I have one simple request, and that is to have sharks with frickin laser beams attached to their heads.

    1 reply

    4 years ago on Introduction

    instead of drilling holes into tube wrap metal straps from fin to keel around body, this will have less chance of leaks.

    Nice fun idea but this would cause trouble here in Perth as there have been so many people bitten by sharks in the last couple of years that someone will call the cops on me if i tried it.

    1 reply

    Reply 4 years ago on Introduction

    Good idea, those straps. It's definitely the way to do and it'll make the assembling a lot easier.

    I had the chance to test this project in the Mediterranean - the last sharkbite was in Roman era, or Greek, I guess - whatever. In your case I would givde the orca version a try! ;)


    Looks like you may have stumbled upon a sail for your kayak too! LOL. Make another one of these that goes in front of you and it will tow you along!

    One thing you could do, is calculate the buoyancy of your air-filled PVC tube and find the amount of keel weight you would need to hang under the container to keep it just barely submerged. Then fill it with stuff and see how much lower in the water it sits. Give the fin some extra height based on what you plan on carrying inside it.

    You may also consider adding a pivot point on the very front of the fin so that if the wind blows hard, the container and the fin could be pointed in different directions.

    1 reply

    Thanx for those suggestions mate, I like that idea of a pivot point btw. Too bad I didn't have got the chance to finetune this project since we left the sea far behind us. It's one of those projects I'll finish one day...


    5 years ago

    wouldnt the fish attract a REAL shark?


    5 years ago

    Very amusing way to solve a problem!


    5 years ago on Introduction

    Try fiberglass for all of it... would be lighter... and could all be manipulated easier...

    plus u could make the storage compartment below the fin any shape you want... just a thought... awesome idea though


    5 years ago on Introduction

    just out of curiosity, would it work to make the body into smaller sections that fit together with threaded connections instead of one long tube?

    sort of like this ... but on a much larger scale to accommodate the gear you want to stow

    1 reply