Cruising cat - sub 90 degrees tack upwind

[Dave_S]

Originally Posted by arsenelupiga

you are forgetting about bridgedeck clearance loss. If as you say loads 3 T then we see 30-40 cm drop in clearance. That is outright dangerous. I had opportunity seeing lighter cats loaded in these 3-4 m beam seas and i can assure you it iwas not pretty. Confirmed by crews. As i am polite will not repeat their werds.

Not sure about the math. I'm fairly skinny (haha, not myself... I mean my boat :-) ) around 15:1 hull ratio and 1m wide at its widest, about 0.4m wide at the stern, and 0.0 at the bow. We are 7.25t for a couple of nights away (2.25t above bare weight and 0.25t over suggested target weight) and draw 0.42m. So 7.25t draws 42cm and don't forget the first cm might only create 5kg of displacement increasing with depth to the last cm which maybe 230kg of buoyancy. From its current waterline it will only increase buoyancy further with depth.

I can't think what I'd put on to add up to 5.25t payload but I would expect to move the waterline no more than about 12cm from where it is now with an additional 3t. What do people take to add up to 5t or more ?

I would guesstimate my weight if I were to do a crossing at 7.5 to 7.75t or about 2cm from where I am now.

[Matt Johnson]

Straight from Bob Oram on Feb 17 2020:

44C B/L ratio = 11.5 @ 5200kgs disp @ 13.5mts LOA. Payload = 1800 - 2200kgs

So now you don't need to guess anymore on these numbers.

Matt

[44'cruisingcat]

Originally Posted by Matt Johnson

Straight from Bob Oram on Feb 17 2020:

44C B/L ratio = 11.5 @ 5200kgs disp @ 13.5mts LOA. Payload = 1800 - 2200kgs

So now you don't need to guess anymore on these numbers.

Matt

Thanks, saved me digging out the plans.

So were looking at an immersion rate of around 220 kg/cm.

So for every tonne, an L400 will sink about 40mm, and we'll sink about 45. The difference is devastating!

[44'cruisingcat]

Originally Posted by Jim Cate

Going bankrupt as a boat builder is not specifically related to poor construction. More often is is quite the opposite, ie, putting too much time and money into the construction and failing to make a profit in the market place. Other times it is due to poor management, labor difficulties or government intervention (ie luxury tax on yachts).

So, I'll add my voice: what builders have worse construction records than Lagoon... you say you've seen plenty, so name them and point out their shortcomings.

Jim

People often seem to equate success with quality. Obviously they think MacDonalds is the best quality food on earth, and Coca cola the best drink!

[double u]

Originally Posted by Dave_S

Not sure about the math. I'm fairly skinny (haha, not myself... I mean my boat :-) ) around 15:1 hull ratio and 1m wide at its widest, about 0.4m wide at the stern, and 0.0 at the bow. We are 7.25t for a couple of nights away (2.25t above bare weight and 0.25t over suggested target weight) and draw 0.42m. So 7.25t draws 42cm and don't forget the first cm might only create 5kg of displacement increasing with depth to the last cm which maybe 230kg of buoyancy. From its current waterline it will only increase buoyancy further with depth.

I can't think what I'd put on to add up to 5.25t payload but I would expect to move the waterline no more than about 12cm from where it is now with an additional 3t. What do people take to add up to 5t or more ?

I would guesstimate my weight if I were to do a crossing at 7.5 to 7.75t or about 2cm from where I am now.

...absolutely gorgeous, your boat!!!

[sailjumanji]

Originally Posted by double u

...absolutely gorgeous, your boat!!!

I agree. Absolutely stunning. And I bet she sails really well.

[Uncle Bob]

Originally Posted by double u

...absolutely gorgeous, your boat!!!

Dave, I concur, oozes style.

[GRIT]

Beautiful. Love the shoal draft too!

Cheers.
Paul.

[smj]

Yes, I’m jealous!

[sailjumanji]

Originally Posted by smj

Yes, I’m jealous!

Which is funny because I think your boat would probably have similar PHRF rating. But he's got a bigger hard top.

(Note that I tried to tell Tony ......)

[double u]

incomprehensible why somebody would buy a boat with the "looks" of a Lagoon...

[GRIT]

Horses for courses. My wife and I like the looks of the "single story" lagoons. The newer ones... not so much.

Cheers.
Paul.

[smj]

Originally Posted by sailjumanji

Which is funny because I think your boat would probably have similar PHRF rating. But he's got a bigger hard top.

(Note that I tried to tell Tony ......)

I’m guessing Tony was trying to save weight?

[sailjumanji]

Originally Posted by smj

I’m guessing Tony was trying to save weight?

Yep, my guess too.

[double u]

Originally Posted by GRIT

Horses for courses. My wife and I like the looks of the "single story" lagoons. The newer ones... not so much.

Cheers.
Paul.

the early generations, before they started the "vertical-windows-craze" looked ok (& an early 55 actually looked sleek!), but those vertical windows are simply unacceptably ugly to me