I have to replace the boom on my Seal 850. I am considering having a boom made 1m longer than the original and using a larger mainsail. This will increase the mainsail area by 1/3. Can anyone think of any problems that may occur such as the yacht being more likely to capsize? I have looked at other yachts of similar size and weight and they seem to have significantly larger sail areas.

regards

David Bamber

'Sea Lady'

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David
Check the clearance with the backstay, and consider the clearance when the boom is lifted whilst jibing.
I must admit that mainsails look smarter and more modern if they have a high aspect ratio.
Aztec has an enormous boom over 3.5m long and the main sail looks very squat.

Mike Edwards
Seal 28 "Aztec"

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I think, 1/3 is quite a lot compared to a standard rig. I would suppose that you get at least more weather helm.
But first of all: If the leech comes 1 m more backward, wouldn´t it collide with the backstay(s)?

Gerold

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Sorry Mike, I was interrupted while typing and had not seen your comment.
You are right, the boom is really long but it is good for a large cockpit tarpaulin ...

Gerold

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I think a 'tall' rig was available for the 28 and 850 so I guess there is margin for more sail area. It's only a matter of reefing a bit earlier. Unless you've already got a tall rig!



Neil Sinclair
Seal 28/27
'Andiamo of Exe'

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