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423zero View Drop Down
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Post Options Post Options   Quote 423zero Quote  Post ReplyReply Direct Link To This Post Posted: 20 Apr 22 at 7:01pm
How is the mizzen controlled ?
Robert
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davidyacht View Drop Down
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Post Options Post Options   Quote davidyacht Quote  Post ReplyReply Direct Link To This Post Posted: 20 Apr 22 at 7:46pm
Double ended sheet, led to side deck by helm.  I have a kicker strop.  The Mizzen affects balance on the helm quite a lot.  It is a mute point whether a Yawl is faster with or without the Mizzen, but you are not allowed to race without one, and must finish with it up.  In truth a Salcombe Yawl is a ketch, since the Mizzen is forward of the rudder!
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423zero View Drop Down
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Post Options Post Options   Quote 423zero Quote  Post ReplyReply Direct Link To This Post Posted: 20 Apr 22 at 9:05pm
Trying to get my head round what it does to centre of effort, presumably there isn't one as such?
Robert
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Post Options Post Options   Quote Sam.Spoons Quote  Post ReplyReply Direct Link To This Post Posted: 20 Apr 22 at 9:46pm
There is always a centre of effort  LOL just as there is always a centre of lateral resistance. Adding a jib will move it forward, adding a mizzen will move it aft but it's always there.

Spice 346 "Flat Broke"
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423zero View Drop Down
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Post Options Post Options   Quote 423zero Quote  Post ReplyReply Direct Link To This Post Posted: 20 Apr 22 at 9:54pm
Missing something OK, why did the designer think he needed a mizzen?
Robert
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423zero View Drop Down
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Post Options Post Options   Quote 423zero Quote  Post ReplyReply Direct Link To This Post Posted: 21 Apr 22 at 6:02am
Went on a cruising forum and had a read, useful sail.
Robert
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davidyacht View Drop Down
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Post Options Post Options   Quote davidyacht Quote  Post ReplyReply Direct Link To This Post Posted: 21 Apr 22 at 6:33am
I believe that it originates from fishing boat origins, whilst the early Salcombe Yawls were never intended as fishing boats, this was a configuration back in the day, as a balancing sail.  And yes the Mizzen moves the centre of effort back, on a reach it is vital to get the trim right or it weights up the helm.  It is also slow to over trim the mainsail upwind otherwise the dirty air off the main shunts straight into the Mizzen.  There is a minimum size for the Mizzen and the Howlett boats have gone down this route to reduce drag.
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Gordon 1430 View Drop Down
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Post Options Post Options   Quote Gordon 1430 Quote  Post ReplyReply Direct Link To This Post Posted: 21 Apr 22 at 8:17am
Hi Davidyacht
Are the fleet at Rock similar?

Gordon
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davidyacht View Drop Down
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Post Options Post Options   Quote davidyacht Quote  Post ReplyReply Direct Link To This Post Posted: 21 Apr 22 at 8:40am
Don't they sail Shrimpers?  Big fleet at Poole too
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Mozzy View Drop Down
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Post Options Post Options   Quote Mozzy Quote  Post ReplyReply Direct Link To This Post Posted: 21 Apr 22 at 10:15am
There is a mizzen on the in laws day boat. It completely gets rid of lee helm upwind. Of course, it's a bit of an air break, like sailing with lee helm is a water break. So I doubt it's any faster with it up, but it does make the boat nicer to sail. 

It does raise the question of why you wouldn't just have the sail plan balanced without it. But it does allow you to keep more sail area forward and an open back deck area (good for fishing I suppose). It can also help with manoeuvrability as you can change the CoE quick dramatically by sheeting it on or off.  Also keeps you head to wind when hoisting or dropping the mainsail. 

Edited by Mozzy - 21 Apr 22 at 10:20am
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