|
Polyethylene tubing used in rigging lacing on a sail vinyl sails home | Fairlead | sailing glossary | buy a kit here |
__batten down the basics_____________ Battens are used to support a sails shape.
Commonly used to extend the sail area of Bermuda style sails
that have a curved outer edge (affectionately called its roach)
without the batten, the sails roach would simply fold over
with the wind. The traditional ‘stiff’ batten is a wooden strip that
slips down inside a pocket sewn into the sail.
The end of the pocket folds over itself (like a sandwich baggie)
locking the batten inside, or there is a grommet on the sail and
a length of line on the batten that ties it in place.
Stiff battens are usually about 2 to 3 times longer than the span
of the roach that they support.
They can be removed when folding up the sail for storage.
Wood battens have mostly been replaced with flexible modern materials
such as fibreglass.
Of course, battens originated in the orient, with the full batten junk rig.
Full battens, that span the full width of a sail, can also be found on
modern western sail
Crafting battens for your model sailboat....
This example shows how to set up some supporting battens on
a typical roached sail, just like the one supplied with your kit.
Although the plastic battens, either cut from the ones supplied with your kit
or the ones you make, will have flexibility, the example assumes they are stiff.
Establish the roach of the sail, (on a paper pattern) drawing a line
from the clew up to the head.
The length of a batten should be about two thirds longer than the roach
the batten is supporting.
Lets start by placing a batten about a third of the way up from the boom,
(see illus.)
Note: battens usually cross over the ‘roach line’ at a 90deg angle,
the bottom batten (first one up from the boom) will often be seen
to be parallel with the boom so that when the sail can be reefed (reduced)
without having to be removed.
Once the batten is in place, the line that defines where the sail will fold
changes, (the fold line is shown in red). It now is between the head of the sail and the
top of the lower batten.
And so, our second batten, set in the middle, establishes a new fold line. __Using polyethylene tubing in rigging_____________
Polyethylene tubing, used in plumbing, can also have many uses in crafting your model.
Sold in building supply stores, it comes in different size diameters that conveniently match
the diameter of our mast steps and some dowel sizes, namely one quarter inch and three
sixteenths of an inch. This type of tubing is easy to recognize, it has a "milky white color" it is easy to work with,
and yet is stronger than the clear vinyl type, used for aquariums.
The 1/4 in. tubing has an inside diameter (I.D.) of 1/4 inch, so it will fit around The smaller 3/16 in. tube has an outside diameter (O.D.) of 1/4inch and an inside diameter
of .17 inch that will snugly fit I tested this tubing in several applications, and it works well, many more uses for the
stuff will come to light as time passes.
Here are some uses for the 1/4 in. tubing used around the mast.
As a gooseneck, slice off a piece about 1/4 in. long, the ring can set above the deck.
A small ring can also be used to support a gaff. When a line is slipped down through the
ring, there is enough tension
(in most cases) that the line will stay put, yet can be adjusted with a light tug.
A ring sliced down one edge will clip right over a mast, and with a small notch, will hold a
line in place for rigging a spar for a sprit rigged sail.
The smaller diameter tube can be sliced into 1/8 in. wide rings and used to join two skewers
for crafting lateen sails, (MKII models) plus they can be easily taken apart!
The small size tube can also be used to make a wooden boom out of a 3/16" dowel.
This may seem a bit heavy for a MkI, but it works well for the MkII and MkIII.
Two small rings on each end are used, note that a short length of line is tied to the end (clew) of
the sail, that short line is slipped through the ring, and the sail can be adjusted by pulling
the line as needed.
The 3/16 in. tube, with its 1/4 in. outside dia., will fit down into a mast step. This allows
you to make a lightweight mast out of a 3/16 in. dowel. It works very well on the MkI, letting
you go design a taller mast without all the weight aloft that you get with a 1/4 in. mast.
You can also use this method on a MkII model, particularly on mizzens.
__Lacing sails________________________
Here is a completely different way to “bend on” or, attach a sail to a mast. It gives a
traditional look to your crafted model, and is not too difficult to do.
A large eye needle, will be very handy (see our article on a mini-marlinespike)
here.
The idea is simple, reinforce the luff edge of the sail, and lace it to the mast with some
rigging line. Work on a clean surface like a kitchen counter top, pull a strip of tape longer than the sail
is high, sticky side up, and tack it down with a couple of small strips at the top and bottom.
(see illus.)
It is important to lay the edge of the sail down evenly, and right down the center of the
tape, on the first try. A method I use is to lay a long ruler, or a length of cardboard, close
to the edge of the tape, the sail is carefully placed on top of it, with the edge of the sail
setting above, but not touching the tape. Once the sail is in position, touch down on the sail
lightly in a few places to tack it in place, then remove the ruler and continue pressing along
the sail.
Reinforced tape comes in different widths, about 1/4in. is all you need. If you are not using reinforced tape, cut a length of rigging line, a little bit shorter
than the height of the sail. (cut the line with a candle or lighter flame to heat seal the ends)
Carefully set the line down the middle, then, even more carefully, set the luff edge of the
sail down onto the tape right beside the length of line. Try not to stretch the sail when
setting it in place, otherwise you will distort the sail shape.
Lightly press along the luff of the sail, then, cut off the bits of tape at the top and
bottom of the strip and fold over the edge and press in place.
Real sails have metal grommets, you don’t need them, but you should punch some holes along
the length of the sail before you start lacing. There are different methods of lacing the sail, some use a simple hitch between each grommet,
etc. I use simple spiral lacing as it creates less problems, and it is easy to adjust.
Spiral lacing is just that. Starting at the bottom, lace the line through the grommet, go
around the mast and up through the next, and spiral your way through to the top. Then secure
the line to the mast head.
Spiral lacing lets you lower and raise the sail without the line tangling, that happens
often when you use some of the other methods, (I will save descriptions for another day) just
undo the top of the line from the mast head and slide it down to the boom. This comes in handy
if you want to transport the model with the mast in place.
At the bottom (tack) of the sail, the line can be tied off at the first ‘grommet’ and the
loose end can be set down into the mast step, or tied to the mast.
The sail should not be tight up against the mast, the lacing should be loose, with about
1/8 to 1/4 inch between sail and mast.
Reducing, adjusting the laced sail..... The sail can be reduced, similar to our other method, by using a length of plastic straw
(sliced along one edge) or a plastic bread bag clip. The sail is twirled around the mast,
something like roller reefing, and then clipped against the mast.
___Making Vinyl Sails________________________ By far the most effective sail material is the polyvinyl material used in the shopping bags
you bring home all the stuff you buy in. ‘Free’ and impervious to water, and ultra light, when
rigged, the very act of walking past a model will cause the sails to respond.
One common material you can use as an alternative, is thin vinyl. It produces a less fragile
sail that displays well.
You can buy the stuff in discount department stores, in the form of shower curtain liners.
Depending where you go, the cost can be really low, you don’t need or even want the more
expensive kind, what you want is the most thin (cheap) you can find. (about $5 or less!)
The thinner the better, because of the weight. Sheet vinyl weighs (at least) three or four
times as much as high density polyvinyl found in bags.
Consider how many sails you can make from a curtain, certainly a lifetime supply for a few
dollars.
The up side... and the down side...of vinyl sails.
- Because of the weight, I would recommend a more modest sail plan than what you can get
away with using high density poly bag. A method I found that works is to use a clothes iron. You first set an iron to the lowest
temperature possible. Lay out a cloth of some kind, like a pillow case, or T-shirt, underneath
the vinyl, and then use another layer of cloth on top. With the vinyl sandwiched in between
the clothyou iron away until the wrinkles disappear. Vinyl melts, so to avoid a real mess, start
off with as low a temperature as you can get, crank it up a bit if needed. Note: We are now offering a sample sheet of vinyl that you can order with our kits,
smoothed down with enough to make about six (or more) sails.
|