Ed,
Its a bit early for me to know for sure but I do
expect if built with care 900kg would be achievable.
I expect my floats beamed and painted will be well under 100kg each and that leaves over 700kg for main hull rig and sailing gear.

Phill-

I would be interested on how your numbers compare to my F25c...

See info from Bill Adams Jr who built all 48 F25c below:

"Thom,

If I remember right the main deck and hull were about 600#, the beams with hardware were about 100# each and the ama's were about 150# each. For a total of about 1300#. I remember that 2 guys could lift the hull and carry it around the shop before it had bulkheads etc!(The main deck was heavier than the hull). All of these weights were before paint and hardware and all the other add-ons.

The way we flipped them was to remove the ama's and then support the bow using the spinnaker pole in a cradle that allows it to turn. Support the pole close to the bow, not at the tip. Then pick up the back of the boat with as many friends as you can find and roll it over. We used to do it all the time with 6 guys. When it is upside down support it under the beam pads front and back. (Don't let it hang on the pole for a long time)

thommerrill
F25c 009
Charisma
Have a nice Thanksgiving
Bill"

Thom,
I have been taking weights but not lately and currently held up working on it by a broken collar bone so I can't do much with the boat except give you estimates from what I've measured so far. Bear in mind that I'm building using the heavier glass laminate option and carbon beams built under vacuum.

The floats were around 130 each with the lifting foil cases installed but still some internals and fairing which has already been done but not weighed since. I expect it to be less than the 150. and the floats are much more bouyant , ie- larger, than the F82.

The beams and hardware should come out quite a bit lighter. Maybe as low as half. The folding mech only weighs around 5kg 11pounds plus bolts per beam.
I don't know about the main hull as I have not started it yet.

I will be able to provide more info when I am a little more mobile and can do some more work.

Regards,
Phill

Sorry to hear about your injury.

I wanted to ask you if you had seen Tor Rabe's mast for his F22R? Its a custom shape and similar to some CST shapes.

Take care of yourself,

thommerrill
F25c 009
Charisma

I have been following this thread for a while now and finally took the plunge yesterday to get a F-85SR built. I wish I had the time and patience to build one of these trimarans myself, but I don't.

Instead, I have commissioned Michael Mallory of Multihullsdirect in the Philippines to build the boat. I have been assigned Sail No. 10 and I hope to launch the boat around the 1st October this year.

I have decided to get a standard F-85 built, with following modifications:
- centreboard option (so that it will kick back if I hit a rock)
- reinforcement for the lifting foil cases, so that I can fit them in the future
- all the necessary attachments so that I can race in Category 3 passage races.
- It is an epoxy foam boat with carbon reinforcement only as specified in the plans

Initially I will be racing in the Philippines, but will probably take it back to Perth once my current assignment is over, maybe in 2015.

I am very excited to see how this trimaran performs and will keep you updated with photos. According to Michael, by the end of April, the hull should be well and truly taking shape.

Michael is looking for more customers, so if you want his contact details, please PM me. I think it is a pretty competitive build price, compared to what second Farriers are currently priced at in Australia.

Have just received the first F-85SR main hull photo, which is hopefully attached?

Edit - Seems it is attached, but how do I make it display in the message itself?

Ian Farrier
Farrier Marine

BTW:- this is not my boat however this F85SR builder only lives a few kms from me.
Always handy to have someone to compare notes. Especially when it is someone who has built a Farrier Tri before.


Regards,
Phill

Hello Ian-

I am always amazed to see these photos from builders around the globe.. The surfaces appear to have come from a mold.

Have you heard from Fiat about his F32SRX?

How is the new factory coming along? When do you think the manufacturing of the F22s will start??

thommerrill
F25c 0009
Charisma

I managed to put my folding mechanism together and pinned it up on the back wall for storage.
Mark Hastings machined the mechanism for me on his CNC and then offered to put a 10mm drill
through the centre of the pins so I could use a tool to remove them easily should I ever need to once
the boat is finished. Interestingly that hole through the pins reduced the weight of all the pins by 1kg.

Small savings add up.

I have just finished the internal laminate of all 4 beams.
My broken collar bone really slowed me down for around 3 months but that is finally coming good so it is all ahead full again.

On the last beam ,which was a front beam, I took some notes.
I noted the quantity of resin in each mix, the time of the mix and the temp in the workshop at the time of the mix.

The reason I noted down the temp & time was because the day was supposed to get quite hot but at the time I started it was quite cool. I just wanted to make sure that I stayed inside the vacuum window prescribed for the resin I was using.

I found that the combined weight of glass and uni carbon was 1.17kg. All up I mixed 1.45kg of resin. 80gms of this was used to mix up a bog for fillets along the beam side/bottom join, leaving 1.37kg of resin to wet out the 1.17kg of laminate.
Following wetting out the laminate I pulled a good vacuum of 25 inches. Upon cure I weighed the peel ply and absorption fabric as it was removed to work out how much resin came out in the fabrics. I found that around 200 gms of resin came out leaving 1.17kg of resin in the laminate.
I was very happy with these results.

I must say it is a relief to get this work done, it is fiddly working inside the beams because of the flanges.
Since then most of the internal beam B/Hs have been fitted so after a bit of work to install the UFS recess and some reinforcing around the inner beam end I will be able to start laminating the outside of the beams which should be much easier work.