Baby daysailor

[Fanie]

Hi Guys,

I purchased two feelfree triyaks and a 6hp Parsun outboard.

By the morrow I'm going to see someone to have a frame bent to connect the two triyaks together.

The frame will get a trampoline in the center you can sit on and fish from.

I also want to have a sail as an alternative to motoring.

I don't have any real concerns on the moment and basically have a rough idea what to expect more or less.

Your comments and input and advice will, as always be valued and appreciated.

The attachment is about to scale. The cat will be 3m wide, each hull is 4m400 long. You can see how the frame is bent and will be around 500mm above the water.

[Fanie]

I've had a bit of a play with the triyaks in the pool whille they were tied together (roughly).

I'm having the daggerboards and rudders cut from polistirene, these I'll paint and glass and vacuum form for the sailing part. A very easy way to make daggerboards and rudders.

The triyaks weigh 35kg each and the frame without trampoline should be around 25kg's. Motor is 27kg's.

[Fanie]

I've run the motor's first 10 minutes of idling in, it sounds great for a 6hp.

The 6hp seems to be the exact same motor as the 8hp and the 9.8hp

This made me wonder what makes the extra 3.8hp on the 9.8hp models, which btw is quite a bit more expensive.

If the motor's are identical, perhaps thery use bigger jets in the carb... ?

[Fanie]

The daggerboards can be fitted between the two hulls and fastened on a round tube, made to rotate up when it hits structure. This is just forward of the triyak's center and should be close to the correct position.

Tacking may not be as easy as it can be on these hulls as the triyaks have a keel towards the rear. Never the less, I want sailing as an alternative propulsion.

[Fanie]

On the sail I have nothing to show yet, but I would probably use the same setup I did on the little trimaran - Aft mast setup, controlled by only two ropes to furl and sail.

[Doug Lord]

Fanie, once its done, if you'll pack it up and ship it to me I'll be glad to test it for the next two years absolutely free! Ain't that a deal! Looks like fun..... Are you going to have one rudder and one daggerboard?

[Fanie]

Hi Dough, an almost irresistable offer there

Two daggerboards and two rudders although one probably only need one daggerboard, it just feel more balanced if there is one either side. One each side will also keep the boards sliding towards either side, as would be the case with one center board. The coupling either side is going to be very simple.

One rudder on each stern. I don't like the idea of the long connection rod, so I'm thinking along the lines of the quick connect push-pull cable setup.

[dstgean]

With the expected speeds of a kayak, you might be better off just messing with one leeboard. Either way it looks like a fun exploration mobile. How about a small cat rig like a Hobie 14?

Dan

[Fanie]

What would the expected speed be ?

[basil]

Hi Fanie,

Re; your outboard motor

I believe that the Parsun is a replica of a Yamaha. Apart from the carburetor the 6 and 8 hp are the same. To upgrade horsepower you just put on a larger carburetor.

Tony

[Fanie]

Hi Tony,

I spoke with someone local and they recon the carburettors look the same, but it makes sense. If the carburettors are the same then perhaps a bigger set of jets.

[Doug Lord]

Originally Posted by Fanie

The daggerboards can be fitted between the two hulls and fastened on a round tube, made to rotate up when it hits structure. This is just forward of the triyak's center and should be close to the correct position.

Tacking may not be as easy as it can be on these hulls as the triyaks have a keel towards the rear. Never the less, I want sailing as an alternative propulsion.

----------------
Fanie, I thought I'd show you this. Its a "catamaran windsurfer" I designed 30 years ago. It used one centerboard with a shock cord to hold it down-so it would kick up easily. The one board had plenty of area and even though it was surface piercing it worked well.
It seems like you might at least be able to try one board before installing two-just a suggestion....

Picture-me and my girlfriend:

(click on image)

[Fanie]

Picture-me and my girlfriend

I still don't know which one you are

Ok. I miss something.
What would be the difference between one and two daggerboards ?
(besides double the weight.)

[Doug Lord]

Originally Posted by Fanie

I still don't know which one you are

Ok. I miss something.
What would be the difference between one and two daggerboards ?
(besides double the weight.)

one less daggerboard= simplicity....... For a high performance cat I'd prefer the board in each hull-but this is not high performance so why go to the trouble?

PS I'm the one with the long hair

[Fanie]

not high performance

Says who ! If the 6 doesn't plane it I'll put a 60 on it.

Actually it would be easier with two than with one board. The tubing just rotates with both boards. I also had in mind to use a down position stopper with bungee cord. If the boards are tilted up the bungee goes past the center line and keeps the boards up, like for when you hit structure or sailing downwind. Or that's the theory anyway.

PS I'm the one with the long hair

Hard to tell, both have their hair on the outside !