Open source 12-15m high performance/semi-cruising catamaran design

Funny- im having all the same thoughts... by the time you have to add this extra structure- you might aswell move the main beam forward and keep the davits or place it on the deck and get rid of the cutout idea.
If we did that- need to think of a boarding arrangement for swimming...

the front prodder can be made into a drop down ramp- theres a few cats out there that do this already, great for beaching but also provides access for swimming too...

 

Given the really mid-ship location of the fwd beam won't the fwd longeron be essential to keep the anchor line off the bows? Umm. All that distance, all that chain, the anchor. weight and weight in the wrong place.

 

UOS - see below;

 

The bridle swings the anchor under the trampoline back to the main beam where the anchor locker is. Id have a similar arrangement on this.

 

nice boat, would be even better if the lee hull was 20-30cm higher in the water, semi-foiling recommended
I guess that mooring at anchor was not high on their design list. A bridle is possible solution but its a bit of a fiddle. Imagine yourself on this boat and wanting to drop hook in many private beaches/coves w/o mooring buoys. Easy to maintain/use the bridle? Your boat, your effort.

 

Looks as if it is 90% performance and 10% cruising.
Your split is??

 

It works effortlessly!. You winch up the mooring line and it cones back until the bridle stops it just short of the locker. As you pay it out, it hangs under it own weight until its on the bottom as you drift back, then your bridle is already in place. What's with all the negativity lately?

 

Not negative, cautious. In most cases the bridle is not at the anchor and exactly where it is set on the mooring chain depends on water depth, weather, etc. The bridle must be set anew with each deployment and removed when retrieving the anchor? I've read comments from owners with the under the tramp arrangement and the difficulty of bridle setting is common complaint.

 

Well its standard design on many cruising cats the world over... i figured it must work or it wouldnt be so popular?
Not worth getting hung up on at this point, all i know is the anchor locker will be beside the daggerboard midship and that keeps weight in a good place. Could run a long channel for the chain beside the catwalk/prodder etc and drop it over the forebeam, all easy to solve problems at any rate

 

Sorry been busy.

Ok..so the tender is lifted up through this cutout..and where do you stow the tender...on the flat deck immediately forward of it?

 

True enough, so many modern cats have the beam mounted anchor.
When playing around with my design I was surprised by how much volume, particularly vertical height, was need for the chain locker. Your boat is much much bigger but if you can bring the anchor shank above the tramp is better?
Here is just a suggestion - run a trough along side the longeron/prodder. Your center board is going to push the anchor run sideways regardless.
Anchor winch is exposed so available for other duties. chain flakes vertically or backwards. Thing is to have the shackles etc out in the open for ease of use.
you want everything buttoned up or out in the open?

 

This idea was loosing traction on many fronts adhoc, but the idea was to have slatted platform which the tender sits atop and the whole shebang can be dropped down into the water as a swim/dive platform etc...

 

Thats more or less what i had in mind... it cam work with or without bridle and or chain guide all the way down the side of the prodder. Just leave a small corner of the tramp open to fit your hands through for shackles etc if deciding to go under... otherwise over the top all the way to front beam etc... many options here, im not going to loose sleep over any of this...

 

Ahh...ok.
I'll let you get on with it then if you've changed your mind.

 

Well it seems silly to build another beam forward of this one to stiffen the floor when i can move the main rear beam forward to do the same job, then support the tender aft of this instead... have to build strong transoms in addition to the beam bulkhead but thats easier than 2 beams all things considered...