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Sail Plan for the 370 |
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bdh198 
Lieutenant Commander 
Joined: 15 September 2014 Location: Solent Status: Offline Points: 58 |
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 Topic: Sail Plan for the 370Posted: 19 January 2015 at 15:06 |
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Hi
We have owned our Hanse 370 since 2007, and for the
first time are going to be entering the Round the Island Race in June. However,
because we've never raced the boat before we need to apply for our rating and
we're going to keep it simple with the ISC Rating System. However, even this simplified rating system needs
some measurements a cruising day sailor does not normally keep to hand. I
therefore spent most of Sunday on my own with the mainsail, jib, a tape measure
and length of string trying to confirm the relevant sail measurements. This job
was made considerably more difficult because the sails are safely stowed below
decks for winter. I've got some of the measurements, but would really
appreciate any other owners who might be able to help with the measurements I
just could not get in those conditions. Our sails are the standard sail plan that came with
the boat when we bought her. The sails are by North Sails.
The measurements I managed to get are as follows: Mainsail hoist (luff) - 14.0 meters Mainsail foot - 5.08 meters Mainsail leech - 14.91 meters Jib luff - 14.35 meters Jib perpendicular - 3.63 meters The measurements I could
not, for the life of me manage with acres of sail in a tiny cabin were: Mainsail 1/2 width Mainsail 3/4 width If the sails are simple right angle triangles then
with a bit of help from Pythagoras I might be able to work them out. My concern
is that they are not simple right angles (hence the need to confirm the 1/2 and
3/4 width). Does anyone happen to know what these measurements
are likely to be? And if this is a very standard sail plan for the Hanse, does anyone
know the Mainsail and Job areas? I appreciate any comments that might be able to enlighten me. |
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Stella*Nova
Vice Admiral 
Joined: 25 January 2004 Location: Lelystad / NL Status: Offline Points: 776 |
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Posted: 19 January 2015 at 18:08 |
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I didn't measure the sails, but (thanks to Marco) here you will find the standard sailplan if you don't know it yet:
http://www.wesailhanse.se/370_documents/370_documents_hanse/hanse370_03_preliminary_drawing01_en.pdf |
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BR Ralf, Ex. 'a mare' H370
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bdh198
Lieutenant Commander
Joined: 15 September 2014 Location: Solent Status: Offline Points: 58 |
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Posted: 19 January 2015 at 20:43 |
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Thanks Stella*Nova that helps a lot and shows that I slightly under-measured the luff and foot.
However, it doesn't show what the Mainsail 1/2 width is or the Mainsail 3/4 Width. Can I get away with simply treating the sail as a right angle triangle with straight sides (which the leech certainly seems not to be) and apply some simple maths, or is there a more precise way of working out that distance that wouldn't involve spreading the main out and getting a tape measure? Also, I need to confirm the Empty Weight and the Sailing Displacement. Can anyone help me with those? Is the Empty Weight what the specifications call the 'Displacement' and is 6.5 tons? and without getting the boat out to weigh it, what would be a reasonable assumption for the Sailing Displacement (Empty Weight + additional 'lose gear' such as sails, running rigging etc?
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Fendant
Admiral 
Joined: 03 November 2012 Location: Switzerland Status: Offline Points: 1671 |
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Posted: 19 January 2015 at 21:31 |
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be careful with the sailing displacement. The numbers in the sales leaflets are straightforward lies.In my spec sheet it says 6.5t tons for my 345, the scale on the crane says 7.3 tons in spring with empty fresh water tank, 50% diesel and beer and wine not yet loaded.
I think that the fake prospectus number is without engine, additional equipment .... Edited by Fendant - 19 January 2015 at 21:34 |
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Frank
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paul_heinz
Lieutenant 
Joined: 09 June 2012 Location: Den Osse Status: Offline Points: 45 |
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Posted: 20 January 2015 at 17:38 |
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Hi,
if you need information I´d go to the Offshore Racing Congress www.orc.org . There you only have to register (free of charge) and you´ll find a lot more than 100 rating certificates on H370 racing under ORC measurement in the Sailor Service database. You are invited to copy the rating certificates and to run a test rating for about 10€. It´s easy to use and will answer all of your questions. |
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bdh198
Lieutenant Commander
Joined: 15 September 2014 Location: Solent Status: Offline Points: 58 |
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Posted: 21 January 2015 at 17:43 |
Fendant, I think care needs to be taken when defining a 'ton' and using that measurement for racing weight because you need to be sure what type of 'ton' is being referred to. If your boat is deemed to weigh 6.5 metric tons then that would be the equivalent of almost 7.2 'short' (US) tons. To avoid the confusion (which is compounded further by the UK ton) I'm going to try and stick to kilograms - although having said that I've seen two different specifications for the Hanse 370 one of which has an displacement of 6800 Kg, the other which has the displacement of 7200 Kg!
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Fendant wrote: