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Mast bend, Mast curves and sail materials etc

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Post Options Post Options   Quote FcH Quote  Post ReplyReply Direct Link To This Post Topic: Mast bend, Mast curves and sail materials etc
    Posted: 10 Jan 15 at 3:50pm
In 1949, Bee Makinnon (teacher at Eton) asked Austin Farrar to build him a wing sail for his Canoe “Defiant“
You can see a photo of Defiant p. 119 in David Chivers'book
From notes of Austin, he is not the first :
- Lord Brabazon in early 1930' mounted an aeroplane's wing vertically on a turnable on the deck of his Bembridge Redwing One-Design (200 sf ft).
- Uffa Fox in the mid 1930' mounted an biplane's wing on a InT 14' Dinghy.
But there are others precursors, for ex. :
- In 1934, Michel Meneo designed and built the Oberdan, with a wing sail with flexing battens, like Patient Lady II in 1971
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Post Options Post Options   Quote Rupert Quote  Post ReplyReply Direct Link To This Post Posted: 03 Apr 14 at 4:28pm
Thats the one I was thinking of!

And that hull - wow indeed.
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Post Options Post Options   Quote I luv Wight Quote  Post ReplyReply Direct Link To This Post Posted: 03 Apr 14 at 3:25pm
Ljungstrom rig - sort of double headsails that open out downwind.


And wow this is also a Ljungstrom design


http://www.bloodaxeboats.co.uk
Andy P
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Post Options Post Options   Quote Dougaldog Quote  Post ReplyReply Direct Link To This Post Posted: 03 Apr 14 at 3:07pm
Fudheid.... Indeed and well pointed out! Actually, it was with Mrs Currey (Bobbie) and Charles on a 12m Sharpie..... the list of his innovative creativity is amazing...an efficient genoa furling system....

Rupert - yes.... somewhere there is a picture of that! I'm not sure that it did use two booms though - it had a form of preventer that yanked the boom forward and then you flew the other sail on something like a jib stick (or even on a dangly pole as with the Icon). W/L would then have to mean just that.... there would be no going high for more pressure! IIRC, the one I saw was on a cat rigged yacht (a US flat bottomed thing springs to mind...)

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Post Options Post Options   Quote fudheid Quote  Post ReplyReply Direct Link To This Post Posted: 03 Apr 14 at 2:10pm
Originally posted by Rupert

I'd forgotten about the Walker Wingsail - a different take on the concept.

So, with wind tunnel pictures and single element wings on canoes, I'm getting  a better idea of the timeline. There must have been others experimenting around that time, too?

One thing I did see when looking for stuff on this was that AF designed the first curved sliding seat - even more off topic, but interesting just the same.

.......and more..... trapeze on the I14 with Mr currey, not to mention the pulpit which he didn't patent as he considered it safety equipment so allowed anyone to copy his design.....doubt you would see that happen these days...
Cheers you

only me from over the sea......
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Post Options Post Options   Quote Rupert Quote  Post ReplyReply Direct Link To This Post Posted: 03 Apr 14 at 11:39am
Another interesting sail I saw pictures of years ago was the one with 2 sails in one, where you sailed upwind and reaching with the cloth together, but ran down wind having separated and goosewinged the main and set it on both sides. Not ideal with battened sails, but would be fun to try on a Topper! you'd need 2 booms somehow, too, of course...
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Post Options Post Options   Quote Dougaldog Quote  Post ReplyReply Direct Link To This Post Posted: 03 Apr 14 at 11:00am
Jim C........

re double luffed sails.... I was just checked back in my files for the comments that are in the 'Comfortable hiking singlehander' thread when I knew that just a bit further on were the details on the Deenbo!

This was the boat designed by P.B. Kraan - think a Hornet sort of hull form but with more rounded sections rather than the hard chine. This had a double luffed sail set on an unstayed mast. The boat showed some amazing boatspeed but went for one development too far - it had a bizarre sitting out aid that just didn't work - and this dragged down the success of this otherwise interesting development!

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Post Options Post Options   Quote I luv Wight Quote  Post ReplyReply Direct Link To This Post Posted: 01 Apr 14 at 10:44pm


Another interesting rig  Big smile

http://www.bloodaxeboats.co.uk
Andy P
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Post Options Post Options   Quote I luv Wight Quote  Post ReplyReply Direct Link To This Post Posted: 01 Apr 14 at 10:09pm
Originally posted by Dougaldog

Hi Andy...will you be at Gurnard the Easter wkend? I'm at Weymouth until then...but hope to be at the club sometime over the Holiday weekend. If the post works out as it should, I might have something of interest too!

A brill pic of the wing rigged IC - no matter that it didn't really work in that format. it shows the thinking!

D

I sail at GSC in my foiling moth most weekends ( tide / wind strength/ wind direction/wave height dependent - which rather limits things here ), but I will be here ( house at 100m from the club ).

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Post Options Post Options   Quote Rupert Quote  Post ReplyReply Direct Link To This Post Posted: 01 Apr 14 at 8:43pm
Thank you Andy - that wonderful photo answers many of my questions.
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