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V Twin

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bferry View Drop Down
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Post Options Post Options   Quote bferry Quote  Post ReplyReply Direct Link To This Post Topic: V Twin
    Posted: 25 Apr 12 at 8:09am
Originally posted by rogue

Yep, although not sure how he'd launch it off the beach!
The gap under the hull seems made to measure for retracting a lifting bulb keel, however having a keel would be a major departure from the design concept of the boat.  I've got my vareo mast sealed at the top and filled with ping pong balls and it does help slow an inversion, but not prevent it, especially in a blow with the windage and waves pushing on the hull. 
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Post Options Post Options   Quote Graham T Quote  Post ReplyReply Direct Link To This Post Posted: 25 Apr 12 at 8:16am
Bernard - if you have inverted a few times with the ping pong balls in your mast I would be interested in how well they have survived - I would have thought that being 15 feet underwater water they would be crushed, unless the mast sealing prevents water ingress at all. Is it possible to get a look at them or is the mast too well sealed?
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Post Options Post Options   Quote bferry Quote  Post ReplyReply Direct Link To This Post Posted: 25 Apr 12 at 8:30am

Good point! I never considered inspecting them since they are still packed in the mast.  I'll have to take the mast down and inspect their condition.   The Vareo mast has a holein the bottom which fits into the mast pot.  The main problem encountered by Vareo sailers is that the water in the mast pot rushes to the top of the mast in a capsise thus accelerating inversion.  Some owners use the base of a bottle to cup the mast base and prevent this from occuring. I had tried this but found that removing the mast through the bridge could cuase damage due to the increased diameter of the mast (when the bottle base gets stuck fast to the base of the mast and has to be removed as a whole)

 
In hindsight, the boat used to stay on its side rather than invert when I originally filled the mast with the balls.  Maybe the inversions are a result of crushed balls (excuse the pun).  I was considering using swimming noodles like these which seem more buoyant and less likely to crush although they tend to absorb water over time.


Edited by bferry - 25 Apr 12 at 8:35am
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Post Options Post Options   Quote ASok Quote  Post ReplyReply Direct Link To This Post Posted: 25 Apr 12 at 8:42am
Sealing a mast has to be the way forward. I don't care what the calculations say about weight of water in water etc. but when you try and right a boat that has a mast full of water its near on impossible to get from near 90degrees to upright.

Previous points are very valid regarding the need for this boat to invert if it goes over. The sheer size of the thing and its design as a light weight - its going to drift off down wind quicker than you'd every be able to swim.
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Post Options Post Options   Quote bferry Quote  Post ReplyReply Direct Link To This Post Posted: 25 Apr 12 at 8:59am

How about using a wind surfing/kayak type lasoo tied to your foot or would this restrict moving about the boat/water? It seems to me that you want to ensure that the helm and boat don't part company in the event of a capsize.

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Post Options Post Options   Quote Owenfackrell Quote  Post ReplyReply Direct Link To This Post Posted: 25 Apr 12 at 9:12am
The sealed mast on my dart will not stop inversion but it will help recover from it as once you get it started it wants to get to the surface. Ok a cat is different to the V twin but a sealed mast can only help. Mythbusters used ping pong balls to lift a sunken boat from around the 7-8m mark and they worked really well.
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Post Options Post Options   Quote maxibuddah Quote  Post ReplyReply Direct Link To This Post Posted: 25 Apr 12 at 9:22am
the other problem with a mast with water in it, is not so much that it is difficult to get past level with the water but once it starts to come up it tends to keep going in a pendulum action capsizing the boat on top if you. I have seen this lots with phantoms.

I'm sure that a certain amount of water gets inside my sealed mast but it ain't much.

I can certainly see the benefits of getting a boat like the v twin to invert so it doesn't blow away, but lashing yourself to it might be almost as dangerous as not. if it takes off in a blow you would be dragged along with no way of getting free easily, and I don't think a knife would help as you are dragged through the water struggling to get a breath unless you are very calm. I would concentrate on trying to hold on to the mainsheet at the very least so you can pull yourself back to the boat.
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Post Options Post Options   Quote rogue Quote  Post ReplyReply Direct Link To This Post Posted: 25 Apr 12 at 9:26am
I used to you a clip on my harness to hold my mainsheet when sailing my MPS... to be fair this was at a pond, so no real danger, I'm not so sure it would have been so wise had I done it on the sea.



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Post Options Post Options   Quote tedm Quote  Post ReplyReply Direct Link To This Post Posted: 25 Apr 12 at 9:28am
Originally posted by bferry

How about using a wind surfing/kayak type lasoo tied to your foot or would this restrict moving about the boat/water?


Yikes..... sounds lethal.
It's a tricky situation, on it's side the boat is going to drift fast, but turtled it's difficult/impossible to right singlehanded.
Surely a lifting keel is the solution in this instance..... in fact you could make it canting, that would be cool :)
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Post Options Post Options   Quote Iain C Quote  Post ReplyReply Direct Link To This Post Posted: 25 Apr 12 at 9:41am
Thinking laterally here...the easiest way to right a Contender is an Eskimo roll. Should you be trying to right it mast upwind, hopefully getting some wind under a rack and getting it flipped that way?  It's so bloody wide it would probably stop at the upright position and you would have your head in the air pocket between the hulls?
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