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Cutting IOM Sails
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lester
Wed Feb 03 2010, 06:42PM
Registered Member #52
Joined: Wed Jan 24 2007, 08:57PM
Location: Southampton
Posts: 128
Hi David, you mention a prospective sailmaker needs three 'seam block's -- are these the same as the 'sail block's of the kind described in Larry's booklet? You also mention you are using a 'full size lofting jig' or a 'full lofting table' -- is the 'jig' the same thing as the 'table'? And if so, does it consist of anything more than a nice large flat surface? (Just trying to understand how you do your sailmaking, thanks!)

Lester
Web site http://www.onemetre.net/
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lazy G
Thu Feb 04 2010, 10:23AM
Registered Member #464
Joined: Thu Dec 31 2009, 05:39PM
Posts: 2
Many thanks for all the usefull info and tips David, some great detail.
I would echo Lester's comments, and would love to know more detail about your jig and how you've gone about shaping and using your seam blocks.
Thanks for sharing! G
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David Alston
Thu Feb 04 2010, 06:03PM
Registered Member #378
Joined: Mon Apr 20 2009, 01:15PM
Location: Rugby UK
Posts: 101
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[ Edited Sat Feb 06 2010, 07:58AM ]

Dave
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lester
Thu Feb 04 2010, 08:34PM
Registered Member #52
Joined: Wed Jan 24 2007, 08:57PM
Location: Southampton
Posts: 128
Hi David. Nice curves and table. I was wondering if your 'seam block' is what Larry would call a 'sail block'? And, was wondering if your 'full size lofting jig' or 'full lofting table' is a nice large flat surface?

Lester
Web site http://www.onemetre.net/
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David Alston
Thu Feb 04 2010, 11:28PM
Registered Member #378
Joined: Mon Apr 20 2009, 01:15PM
Location: Rugby UK
Posts: 101

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[ Edited Mon Feb 22 2010, 07:51AM ]

Dave
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tillergirly
Sat Feb 06 2010, 09:23AM
Val
Registered Member #62
Joined: Fri Jan 26 2007, 02:08PM
Posts: 332
If I have learnt one thing in my years of sailing, it is that we reinvent the wheel regularly but each time it gets better because someone took a fresh look. David I would be very interested to see your blocks and jig. Do you have any photos? Like you, repeatability seems to me to be the most difficult thing to achieve and the idea of a variable jig when you want to change the shape is very appealing.
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Slow Coach
Sat Feb 06 2010, 11:29AM
Guest
Doctor D. I used to get annoyed at certain types of responses to my postings. I have come to realise that there will always be those who have a somewhat unclear agenda. Please do not let them affect persons like yourself. By trying to discourage the amateur from doing their own thing they want to get us uptight. When I mentioned how reasonably priced David Creed was I had all sorts of responses - some on the forum and others through the private email facility on the forum. One person stated that people's livelihoods were at stake. Now I am sure if Tesco sold a plastic container ideal for mixing resin, and I mentioned that on the site, the manager of Asda would not be contacting me suggesting tht my posting could threaten his livelihood ! It is rumoured that the Chinese are making IOM's. If they decided to manufacture a good quality IOM some people might be nervous - but there would have to be an importer and distributor each raising the price and we would probably still pay a similar price as we can now buying direct from the manufacturers here in the UK.

The MYA is a non-profit organisation which belongs to each one of us. DOn't let an incredibly small minority mess up the forum. I say incredibly small minority because I know most of the professionals would not waste their time trying to upset people on the forum - why ??? - because the good ones are all too busy and have orders to complete !!
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lester
Sat Feb 06 2010, 05:18PM
Registered Member #52
Joined: Wed Jan 24 2007, 08:57PM
Location: Southampton
Posts: 128
For those still interested in the use of sailmaking blocks and the analysis of the resulting shapes, I mention some of my Web pages which might help:

http://www.onemetre.net/Build/Sailmake/Sailmake.htm
http://www.onemetre.net/Build/Sailblok/Sailblok.htm
http://www.onemetre.net/Build/Cuben2/Cuben.htm
http://www.onemetre.net/Race/Sailmeas/Sailmeas.htm
http://www.onemetre.net/Race/Mastcam2/Mastcam2.htm

This page mentions some findings from wind tunnel experiments:

http://www.onemetre.net/Design/WindRNL2/WindRNL2.htm


Lester
Web site http://www.onemetre.net/
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DaveW
Thu Feb 11 2010, 02:12PM

Registered Member #419
Joined: Thu Aug 20 2009, 12:59PM
Location: Dartford, Kent
Posts: 37
Although he's not giving much away, I came across this interesting leaflet here which might be useful to anyone wanting to start sailmaking.


Regards

DaveW

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lester
Thu Feb 11 2010, 08:44PM
Registered Member #52
Joined: Wed Jan 24 2007, 08:57PM
Location: Southampton
Posts: 128
As Graham's leaflet itself says, "see Larry's book for a better method [of actual broadseaming]". There is other information in the leaflet, though, that continues to be of great value.

Lester
Web site http://www.onemetre.net/
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