Aftmast rigs???

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My post above sounds too negative and I can't delete or edit it. Mea culpa.

 

I like the idea of an aft mast A frame so that it could easily be dropped for bridges etc. The A frame could also maybe have movable foil fairings over a structural tube? Then it could be counted as sail area rather than just drag. There would be almost no parasitic rigging wire. I expect an A frame has many structural advantages, but its downfall has always been air drag. Dropping a mast on a large cat could then just take an hour or so instead of needing a crane. That would open up many areas for cruising.

 

aft mast in winds too light to sail.

Some thing I have noticed about my rig is that in light winds I am the fastest boat on the lake at 2 knots. The ability to a make way, with a huge Genoa in winds so light that every one else is stalled.

 

Where is "Monties marina" ? Is that the correct spelling??

 

Its a not that close to my house, so I have not been there just to speak to him.

https://plus.google.com/111943354826214498129/about?gl=au&hl=en

 

Ah ha,...I thought maybe it might be 'over there' due to your hailing port. When I googled it first time I got a location in Miami, Florida for a 'Monties marina'.

Still looking forward to talking with him.

Recently I moved to a new residence, and had occasion to unpack a box that contained a small model of this design that I had taken to the 2005 Miami Boat Show. It has 'renewed' my interest to 're-explore' the possibilities with this rig. I'll post a few pics of that model soon.

 

Atlantic Mastfoil 47 Cat

Another mainsail-less, alternative design sailing rig that looks quite promising...

http://www.chriswhitedesigns.com/atlantic_cats/mastfoil/update_01-12.shtml

...sleek looking also

 

Pretty damned clever. They must be using carbon fiber masts, as I see no spreaders, and I see the back stays going all the way to the masthead.

I presume the masts are round in section, so the foil socks can easily rotate.

 

Actually the mast are foil shaped, and consist of 2 segments

http://chriswhitedesigns.smugmug.com/ATLANTIC-CATAMARANS/Atlantic-47/Atlantic-47/38278190_6FgXKw#!i=2419796815&k=RnZMM5k

 

Nice, real life, non-argumentative summary of a well-thought-out and well-executed "radical" or "non-traditional" design and voyage. Makes me wish we could rotate our foils. Thanks for the post.

 

Back stay angle

Hi
I am thinking of adding a stern spar for a back stay anchor. It will also be used to raise and lower the mast. It will be built from aluminum mast.
I am planning on going to the mast head. As I think a stern spreader would bend the mast more than going to the mast head.
Any ideas on what would best for keeping the bow stay tight. It's an old Hobie cat mast. So if it gets destroyed it's no major lose. I attached some pictures.

 

No sense in re-inventing the lever

http://www.macgregor26.com/mast_raising/mast_raising.htm

 

yep a great little machine.

My mast only hinges forward. Mostly curious about a good scope angle for the back stay on a masthead rigging. I have been using a nearly free standing 24' mast. I need to tighten my bow stay more. I can add a single aft spreader at 19' up and anchor at the mast step. Or add a stern spar about 8' long at a 45 degree angle up and over the stern.

Really I need a 20' center hull with 5 feet of boat behind my aft mast mounting step.

I think a mast head rig would be inherently more rigid. Than mounting a aft spreader at 19' and coming straight down with a mien sail wire.
Thanks.

 

Mien. " Mizzen sail." Auto spell checker is nauticaly illiterate.

 

Back in Perth I had a conventional cat with a lowerable mast.
My main problem was to keep it in column once the shrouds got loose as it wanted to go either to port or starboard, I solved the problem then, but it took me 15min to get set up and only 1m to lower or raise it by electric winch.
An "A" frame would be much easier.

I now have been living on a production cat for 5y, but I am still keen to build a new one with an "A" frame and the idea of having foils as in Chris White (that you just mentioned) is very attractive.
Very well worth studying and developing it.