hi i have just been given, 2 very light 45lbs (each) 16' v deep and i want to make a formula 16, i have most of the gear from a unicorn, except a mast so if anyone has a 8.5m (28')ish ,mast in the uk that would be cool,
i realy need a plan of the sails for a formula 16 so i can get them in the right place to stop it sailing to leward or windward and any other advice ppl could give me thanks rich

Hi Rich,

Take a look at www.formula16.org

All the information you need should be there (although having just tried the site it doesn't seem to be up at present....Paul?)

I don't quite understand what you mean by getting the sails 'in the right place'?

EDIT: Just checked again and it's working fine.

Rictorn,
It may be worth talking to John P of Stealth as he is in the UK.
Stealthmarine@tiscali.co.uk
He may be able to help you out with mast and other stuff.

Good luck.
Regards,
Phill

Jp is your man font of knowledge ,builds boats , very helpfull and may have some bits for you.

If you plan to use a unicorn main though , you could only use a unicorn mast , they are unlike any other cat mast sailing in existence --- very , very , very bendy !! and sail cut accordingly

http://www.stealthmarine.co.uk/

Hmm - wretched thing. We've got some bizarre problems on that server, which we're looking into. In the meantime, I've pointed the DNS back to another server. This should fix it, but if you've tried to look at the site in the last few hours, your computer may have cached the DNS results and you'll get pointed to the broken server.

Paul

hi just to clarify, i am going to use rudders, beams tramp and so on from the unicron, but i don't have a mast, so i would realy like a 8.5m/28' one but a unicorn mast would be better than nothing
i intend extenending the sail by adding a pannel to the bottom an some to the leach at the top to give it ia high aspect ratio, but i am worried if i just plonk this mast and sails on the beam the boat would almost certianly be unbalanced and either have lee or weather helm, what do people think?

What are the hulls that you have Rich? Can you post a picture?

A measurement of main beam position measured from the bow would also be a help...

There is already a very successful F16 modified from an A Class in the class. It is called Altered. You can do a search on this forum for the story behind her. I don't know whether or how Gary calculated the main beam position (I know he took about 18" off the bows and 6" off the sterns) but the result is very successful.

hi the centre of the frount beam is 80" or 203cm from the bow, asuming a normal rake? what is normal in degrees from perpendicular?is this the correct length from the frount to put the mast on a normal (production) formula 16?

it is 15'10' is the f16 dead on 16 foot i could extind it a bit but don't realy want to as i am quite happy fitting it up but not skilled enough to maka a hull myself, so this is a ideal project

From past experience I wouldn't take Cat measurements from the bow as they vary so much. I have it from good authority that the main beam, centreboard casings etc are better measured from the transome as this is a definfinte point.
P.S Good luck with the project and keep us all informed.

I forgot to mention that F16's are up to 16'5" long. As for main beam location the length of your mainsail foot will be a significant factor as the longer it is the further forward the main beam will have to be moved. So as previously mentioned have a quick check on the F16 website for sail dimensions (I hope you'll find them). <img src="http://www.catsailor.com/forums/images/graemlins/confused.gif" alt="" />

thanks for all your replys keep them coming any ideas/ critisism will be taken on board, please tell me what will and what may not work and why of course

the hulls are vdeep so their is no daggerboard the bow and stearn are very similar so where the place where the centre of the wetted area is (prosumably the centre of the daggerboards would be) is 95" from the bow and stearn

i can't realy find sensible sail foot length for a f16 sail but it is not a issue as i have a stainly knife, friendly sailmaker and hack saw for my pretty carbon boom boom so for the sail i would i go short at the bottom and make it as square as poss at the top i am not worried about pitching i just want it to go as quick as poss in a fource3

so if anyone can put me on to a pic/plan idealy with dimentions or just dimentions of the highest aspect ratio sail for a f16 they know that would be ice cool

i'll get some pics up of the hulls on here

and i am very interested in any sugestions, as i know the pitfalls of just putting a random rig on th eboat

thanks rich

My mainsail has a luff length (full tensioned) of 8.00 mtr and an area of 14.80 sq. mtr. With this I have an aspect ratio of 4.31 and a foot length of 2.10 mtr. The length of my squaretop is 580 mm.

My mainsail was made in 2003 and it reflects the standard then. Currrently the squaretops have grown to about 800 - 850 mm in length and the max allowed F16 area is now 15 sq. mtr with a max luff length of 8.10 mtr. I estimate the foot lengths to now be just over 2.0 mtr, as in 2.05 and such. This leads to an aspect ratio of 4.37.

Pretty much F16 mainsails have aspect ratio's between 4.25 and 4.40 depending on how the individual sailmakers cut their sails.

I hope this helps.

Wouter

Hi Rich, I am not an expert on this, Maybe Wouter or some of the others can help, but if you have hulls from a Quatro or a similar cat, a full F16 rig just might be too much for that platform. I am not sure that the buoyancy would be there. When the others see the photos, I am sure that they will comment.

i realise the hulls may lack a bit of boancy at the bow but, i have a friend who is a hydrafiol expert and he aggrees you could have lifting foils on the bows or i could just extend beeth up the bows, but that is not somthing i will worry about untill it is a problem i just want to get the sails in the right place so it wont have lee or weather helm, but thanks for your concern and keep any suggestions coming

especialy where the frount beam should be if the sail is as suggested, am 15m squere main 2m at the foot and 0.8m at the top and i have a normal size jib

keep it coming

ps t-foil rudders would counter act the lack of boancy at the bow