GF42 trimaran design

Yeah Corley Lock did say to me that it was silly for people to go cruising in boats that were designed for racing with more than a wink at my living on the Twiggy.

I won't hijack the thread anymore - I will be happy to see the boat sail and listen to the thoughts of the owner. As to my take on some of the best racer/cruiser tri design try this

http://yachthub.com/list/yachts-for-sale/used/sailing-trimaran/newick-traveller-50/110604

cheers

Phil

 

Catsketcher;
I pretty much agree with all your points about cats v tri's for cruising, but only above about 28ft.
Below 28ft a cat becomes two sewer pipes and I think tri's are more suited.
My ideal would be a smaller Cirro or Horstman, I dunno is a Horstman still relevant today ? Could the design be slicked up using ideas in the GF42 shapes ?

 

The Cirro is a nice boat and I think that a good version would cost about $60 000. Easier and probably cheaper than building one. A few thoughts

- Why 28ft? If you can go longer the boat will sail better?
- The Hortsman has the shape it has to deal with the weight it has to deal with. Hull shape on a cruiser starts with the required load. Work out what you want on the boat - be very realistic - and then start the hull shape from the required volume to float the stuff. I would be absolutely rigorous about this as adding volume to a finished hull is really hard and designers are notorious (including on my first design) at underestimating the weight and therefore volume required. Then the boat floats low and goes slow. So no - you can't update something fat and wide with thin sexy shapes until you get rid of the weight.

cheers

Phil

 

More updates on the construction gallery of Greg's facebook page showing the main hull half being laminated and bagged.

https://www.facebook.com/media/set/?set=a.172757886240481.1073741828.172753599574243&type=3

 

The build is progressing quickly more updates at the Facebook gallery:

https://www.facebook.com/media/set/?set=a.172757886240481.1073741828.172753599574243&type=3

 

All that WORK, and they still need someone to test it out .... What a shame.

:idea:

I volunteer.

 

The first float halves have been lifted from the molds and rapid progress is being made on the build. More photos have been added to the construction folder:

https://www.facebook.com/media/set/?set=a.209257685923834.1073741832.172753599574243&type=1

 

moulds

So are those moulds single use ?

 

I had a chat to Greg about it and he indicates they would be good for at least 3 more uses. They are made of 1.5# EPS foam.

 

The main hull is being levelled up in preparation for the crossarms, lots of photos of the progress on Greg Lynn Yacht facebook page:

https://www.facebook.com/media/set/?set=a.209257685923834.1073741832.172753599574243&type=1

 

The platform is together now and looks very impressive:

https://www.facebook.com/media/set/?set=a.719186971465421.1073741827.662279293822856&type=1

 

Gf 42

Sure is impressive! I just found the foil: 80% vertical lift downwind, 50% vertical lift and 50% lateral resistance upwind:

 

The platform is in final paint now and looking very sweet indeed. I'm really looking forward to seeing this one on the water.

https://www.facebook.com/media/set/?set=a.299244676925134.1073741833.172753599574243&type=1

 

Gf42

Sure is gorgeous-thanks, Corley!

 

Greg Lynn had some problems with the initial mast stepping and the mast fell and was broken (no injuries thankfully). They have managed to get the mast repaired and after restepping the rig have shared the first sail test of the GF42 trimaran here sailing under reefed main:

https://youtu.be/wajAR6L2SRo