Doug,

Good, you came through, as I knew you would.

Twist or sail shape is what its' purpose is.

AND yes, I think it is time to re-visit Twist!

Ole Thom

Great Scotty!!

A "HandyBilly" ah yes!! You rememder lessons learned on the "Pau"

Over tension probably wouldn't break or bend anything but would make the
top of the sail "Hook" . A lousy thing for sailing!

Ole Thom

Yeah Scotty.. it doubles as a cherry picker for those dockside cargo loads
of squirty cheese and beer.

CM

"Scott Vernon" wrote in message
...
| twin cruising vang???
|
| "Thom Stewart" wrote in message
| ...
| Scott,
|
| You should think about the twin cruising vang. It can act as a
| preventer
| & vang. It will also maintain your sail shape when you let out the
| sheet
| to reach or run.
|
| Ole Thom
|
|
|

"Scott Vernon" wrote in message
...
|
| "DSK" wrote

| We used it with a gin pole for
| raising the mast, on those few occasions I didn't lever it up by
| hand
| (carefully lifting at the 25% mark).
|
|
| That's impossible, according to Moron.

No I didn't...

CM

"DSK" wrote in message
| That's impossible, according to Moron.
|
| Hey, just 'cuz *he* can't do it, doesn't make it impossible!
| ;)

I never said any such thing you lying pricks.. the both of you! :-)

CM

Thom Stewart wrote:

Over tension probably wouldn't break or bend anything but would make the
top of the sail "Hook" . A lousy thing for sailing!

You're right. It probably won't break or bend anything. Unfortunately,
"probably" isn't good enough when it comes to keeping the rig intact. A
rig with a 65% chance of making it through the afternoon will "probably"
make it, but I wouldn't count on it.

An overtensioned vang can definitely shear off a gooseneck - especially
if you've wanked down hard on the vang to depower while going upwind and
forget to let it off when you bear off to a run. When you're sheeted
in, the force on the goosneck is mostly compression; bear off to a run
and the force is shear. You see this failure on dinghys that have had
the vang upgraded from a stock 3-1 or 4-1 to a 15-1 or 16-1 without
upgrading the gooseneck as well.


--
//-Walt
//
// http://cagle.slate.msn.com/working/040514/matson.gif

Oz

A Vang is about controlling sail SHAPE. The Boom becomes involved
because the Vang is attached to the Boom. In that sense I have to agree
with you. The Boom is a sail shaper.

Ole Thom

"Thom Stewart" wrote in message
...
Ok Doug,

I' ll give it a try

Since the Vang; Solid or Rope, What ever, has been kicked around as a
Hoisting Device, which it isn't let's talk about what it is for.

Well, it's main function is to pull the boom down. While the boom is over
the travellor, the mainsheet can be used to control the height of the boom.
As the boom moves outboard of the travellor, the sail will lift the boom
unless the vang is used.

However, my boat doesn't have a dedicated topping lift, so I also use it to
keep the boom up as we come into our berth.


Why is it necessary? When do you use vang pressure? To do what? If it's
good sometimes, why not all the time?

Whenever the boom is not over the travellor, the vang can be used to control
sail twist. I suspect that many sailors use it even when the boom is over
the travellor. In this case, the sheet can be eased instead of lowering
the travellor.



How much tension should be put on a Vang? Can a strong Deck Ape over
apply tension by hand?





Let's talk about it.

You first Doug. It is a Racers gimmick. Tell us why?

It isn't a gimmick at all. Cruisers us the vang when going downwind to
reduce "death rolling".


Regards


Donal
--

Donal,

A very good description of a Vangs usage.
When you ease the main sheet past the angle of the traveler, the vang
maintains boom height and sail shape.

That is why I asked about vang tension. Just enough tension on the boom
to start to ease the main sheet when it is close hauled. Any more
tension will force the top of the sail to hook

By the way Donal is you don't have a vang you can set a barbar haul and
get the same results. Set it on the sheet and to the toe rail and you
can still trim the main

Ole Thom

Donal,

The "Death Roll" there is a much better adjustment.

Called a "Preventer" It is a line from the end of the boom and taken
forward. With the pressure of the Preventer and the pressure of the main
sheet set, holding the trim, the boom is pretty well stabilised.

If you are using a Vang that's been unclipped and fastened to the deck
or toe rail it do the same thing but can be a PITA if you need to get
rid of it fast, A single line or "Kicking Strap" as you English call
them does the same thing but that can even be a bigger PITA. A good fore
deck crew with a sharp knife can be pretty handy,

How's that Doug. Is that enough talk about "PREVENTERS?"

Ole Thom