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View Full Version : gaff riged cutter? right?



Paul Pless
04-20-2016, 11:54 AM
http://40.media.tumblr.com/22edf992004e1612219b5e007b7cbe6a/tumblr_o5ufstQnrD1u8bpubo1_1280.jpg

Bobcat
04-20-2016, 11:57 AM
Nope. No separate peak and throat halyards.

Paul Pless
04-20-2016, 12:04 PM
Nope. No separate peak and throat halyards.
you might note bob perry uses a single halyard (per mast) on this schooner. . .

http://www.jakatan.com/spardeckplansmall.jpg

http://www.jakatan.com/profile.jpg

Bobcat
04-20-2016, 12:20 PM
Even with a single halyard, which I agree is rare, you can adjust the angle of the gaff. On the rig in the OP, there is no way to adjust the angle of the head of the sail

Sky Blue
04-20-2016, 12:59 PM
the efficiencies of sail shape were not as well understood as they are today


....

Chris Smith porter maine
04-20-2016, 01:02 PM
you might note bob perry uses a single halyard (per mast) on this schooner. . .

http://www.jakatan.com/spardeckplansmall.jpg

http://www.jakatan.com/profile.jpg

I had not seen Jakatan before very very nice
http://www.jakatan.com/index.html

gilberj
04-20-2016, 01:08 PM
Fat head sails are sort of derived from gaff sails, sort of resembling the next development of Herreshoff's short gaffs. Some gaffers use a single halyard, mine does for both the main and the mizzen, and would not go back to separate halyards on this boat at least.

CWSmith
04-20-2016, 02:40 PM
I'm still not used to the look of that main head. It bothers me. It doesn't look right.

Peerie Maa
04-20-2016, 02:46 PM
'Tis not a gaff, but it is a half sprit.

John B
04-20-2016, 04:49 PM
Its been the trend for the last few years or decade perhaps as people realised that they could tap into the big advantage a gaff sail has over a pin headed bermudan, lotsa power eased sheets.

First ,lots of roach , then square tops, then ways to make the square tops stand ( a batten like a gaff).

This is the first boat I've seen where the square top is actually peaking up, crossed us about 3 weeks ago.

http://i227.photobucket.com/albums/dd48/Waione_photos/misc%2016/20160313_152705.jpg (http://s227.photobucket.com/user/Waione_photos/media/misc%2016/20160313_152705.jpg.html)

Sky Blue
04-20-2016, 05:36 PM
I would argue that instead of being inspired by gaff sails per se, the thinking is really more about increasing sail area up high, where the increase can do the most good in terms of drive. It is interesting that a traditional technique was used to achieve this, but I suggest this was done more as a practical solution than so much a nod to tradition.

john welsford
04-20-2016, 05:38 PM
There is some interesting research going on in the wind tunnel at Auckland Uni trying to figure out how to manage the airflow around the head of the sail, we see all sorts of shapes on the wingtips of aircraft these days and some of the grad year students have been trying to achieve the same kind of efficiencies.

John Welsford



Its been the trend for the last few years or decade perhaps as people realised that they could tap into the big advantage a gaff sail has over a pin headed bermudan, lotsa power eased sheets.

First ,lots of roach , then square tops, then ways to make the square tops stand ( a batten like a gaff).

This is the first boat I've seen where the square top is actually peaking up, crossed us about 3 weeks ago.

http://i227.photobucket.com/albums/dd48/Waione_photos/misc%2016/20160313_152705.jpg (http://s227.photobucket.com/user/Waione_photos/media/misc%2016/20160313_152705.jpg.html)

Paul Pless
04-20-2016, 05:40 PM
I would argue that instead of being inspired by gaff sails per se, the thinking is really more about increasing sail area up high, where the increase can do the most good in terms of drive. It is interesting that a traditional technique was used to achieve this, but I suggest this was done more as a practical solution than so much a nod to tradition.yes, or what john just posted ;)

the boat in the op is just unusually proportioned (for a modern boat) with the stick more than halfway aft and the bow sprit and the multiple headsails, she's really recalls more cutter than sloop

i threw gaff in there for ****s and grins. . .

Canoeyawl
04-20-2016, 05:45 PM
http://i227.photobucket.com/albums/dd48/Waione_photos/misc%2016/20160313_152705.jpg (http://s227.photobucket.com/user/Waione_photos/media/misc%2016/20160313_152705.jpg.html)
That "Gaff" is a lot more like a sprit.

I might call it a sprit rigged cutter!

Sky Blue
04-20-2016, 05:51 PM
yes, or what john just posted ;)

the boat in the op is just unusually proportioned (for a modern boat) with the stick more than halfway aft and the bow sprit and the multiple headsails, she's really recalls more cutter than sloop

i threw gaff in there for ****s and grins. . .

I was trying to nudge him just a bit without disagreeing with him. These Kiwis are a cagey bunch, one must be ever so delicate in drawing them out. Very different from Aussies, of course.

robm
04-20-2016, 06:05 PM
So when do they add topsails to these modern "gaffers"? Oh wait, that is what they are trying to figure out in Auckland right now: A tip treatment to improve the efficiency of the whole sail.

gilberj
04-20-2016, 07:30 PM
Obviously the intent was performance, but not sure where the inspiration came from. LFH certainly was thinking of performance and other advantages when he designed most of his last boats with short gaffs.
I am inclined to agree these are more technically a development of the sprit.
Brewer designed Mystic, and Chapelle also designed a boat with a similar rig.

Duncan Gibbs
04-20-2016, 07:44 PM
Very different from Aussies, of course.
Yes! We're entirely reasonable and invariably correct. People with the last name of 'Blue' OTOH...

Peerie Maa
04-21-2016, 02:40 AM
'Tis not a gaff, but it is a half sprit.


That "Gaff" is a lot more like a sprit.

I might call it a sprit rigged cutter!
You got me on ignore?

Chris Coose
04-21-2016, 04:48 AM
One thing she ain't is a single- hander. She looks to be hogged, perhaps by the weight of the human mass aft.

Paul Pless
04-21-2016, 10:29 AM
Her rig transmits 150 tons of compression to her deck mast step!

Paul Pless
04-21-2016, 10:29 AM
the head

https://keyassets.timeincuk.net/inspirewp/live/wp-content/uploads/sites/21/2015/03/Photo-13_Tacking-Head-617x400.jpg

Paul Pless
04-21-2016, 10:31 AM
She looks to be hoggedreverse sheer

http://www.one.sail-world.com/Photos_2014_12/Alt_comanche%20003%201.jpg

Paul Pless
04-21-2016, 10:35 AM
http://www.superyachttimes.com/default/cache/file/79121A96-7960-4705-B82FE806DC793795.jpg

Sky Blue
04-21-2016, 03:56 PM
I really like the look of her, especially that last shot. She's a wild rocket.

Paul Pless
04-21-2016, 04:24 PM
http://www.charterworld.com/images/yachts/100-foot%20racing%20yacht%20COMANCHE%20under%20sail%20-%20Photo%20by%20Onne%20van%20der%20Wal.jpg

Paul Pless
04-21-2016, 04:26 PM
how would you describe the sea state in this pic? how large are those waves?

http://www.abc.net.au/news/image/7055210-3x2-940x627.jpg

Duncan Gibbs
04-21-2016, 06:51 PM
2 to 3 metres. A piffle on Bass Straight.

Comanche finally took line honours in the Sydney to Hobart last race after a few attempts to beat Wild Oats.