Daggerboard Adjustment

[Fanie]

Thanks for checking...

I know the daggerboards are in their sheath, but I can imagine they could be difficult to adjust up or down due to their weight as well as side forces from the water.

How are daggerboards adjusted up and down in a sailing catamaran ?

[Fanie]

What ! So many experts on this forum and nobody knows

[Trevlyns]

Patience ou boet!

I'm no expert but I'm not aware of any problems raising and lowering them. S'pose you could always use a block and tackle if it was difficult.

Anyway, lets wait for the experts!

[CTMD]

How big is the boat? Most mid size cruising boats use 2:1 up-hauls and down hauls with the up-haul sheave being built into the board and the downhaul one is mounted on the a frame. If its for a bigger boat have a look at leopard's system (not a monohull but very tidy design).

[brian eiland]

Originally Posted by Fanie

I know the daggerboards are in their sheath, but I can imagine they could be difficult to adjust up or down due to their weight as well as side forces from the water.

How are daggerboards adjusted up and down in a sailing catamaran ?

Weight has very little to do with it. It is their highly loaded condition you are working against...and side loading at that. You must 'unload' the board before trying to move it up or down. This can be accomplished with a momentary change in the boats direction that unloads the board temporarily.

[Fanie]

Ah thanks everyone. I'm getting somewhere now. I appologise I was assuming a cruising catamaran would be understood, in my case I'm looking at a 10m cat.

I'll google for the look at leopard's system, thanks Chris, it's something to go on.

Thanks Brian, I assumed there was a trick to get those wedged ones up. So when you tack if needed that would be a good time to ie swap boards.

Looking at the size of a daggerboard, they should weight a bit. I assume the 2:1 uphaul is like a winch (of sorts) ? I saw a picture of one with a rope to lift it with, not sure if it has something to take it down.

He-he Trev, I'm sure a block and tackle is one way I can see the tri-pod on each hull with a small 5 ton block and tackle... could double as a lifting device for the size fish I intend to get

[brian eiland]

Originally Posted by Fanie

Thanks Brian, I assumed there was a trick to get those wedged ones up. So when you tack if needed that would be a good time to ie swap boards.

For a short moment as you tack, or you can momentarly head-up with a flick of the tiller and unload them momentarly. You can some times winch them up under load, but usually never down. Depends on size of vessel and boards.

[Fanie]

Thanks Brian, all I needed to hear for now.

Thanks everyone else who commented.

I'll come crying again if I need any more on this.

[Meanz Beanz]

Originally Posted by brian eiland

Weight has very little to do with it. It is their highly loaded condition you are working against...and side loading at that. You must 'unload' the board before trying to move it up or down. This can be accomplished with a momentary change in the boats direction that unloads the board temporarily.

Yes... even on a small cat like my SW24.

[Trevlyns]

Originally Posted by Fanie

He-he Trev, I'm sure a block and tackle is one way I can see the tri-pod on each hull with a small 5 ton block and tackle... could double as a lifting device for the size fish I intend to get

In your dreams man

[Fanie]

Yes, you're right. Ok, I won't use them to lift the daggerboards, but I'll defenately need them for the fish

I wonder if fish count for pay load