shimming loose fins-how?

shimming loose fins-how?

Post by GILCHR.. » Fri, 02 Dec 1994 05:08:39


Well, the subject line pretty much says it all.  What do
you use to shim your fin when it gets wobbly?
Rae
 
 
 

shimming loose fins-how?

Post by Robert Muffl » Fri, 02 Dec 1994 13:31:10


Quote:
>Well, the subject line pretty much says it all.  What do
>you use to shim your fin when it gets wobbly?
>Rae

Rae:

If you're using a fin with the standard Chinook or similar "older" type fin
box, I suggest cutting a piece of plastic from a soda pop or other plastic
bottle and shaping it to fit around the base of your fin. This worked for me
with my older board. The newer boxes which require the fin to be bolted
through the hull "shouldn't" allow the fin to work loose, unless the bolts
themselves are loose. In any event, I'd imagine the plastic bottle trick would
work just as well with these fins too. Whatever you do, don't let anyone try
to sell you some gadget to fix this problem...you should be able to do this
at no cost:-).
--
Robert Muffley
Niagara Frontier Chapter
American Society for Public Administration

 
 
 

shimming loose fins-how?

Post by Marc Kristopher Gui » Fri, 02 Dec 1994 11:32:26

Quote:

>Well, the subject line pretty much says it all.  What do
>you use to shim your fin when it gets wobbly?
>Rae

Rae,

Most windsurfing shops sell pre-cut pieces of stiff plastic sheet in varying
thicknesses for a few cents, although you could always cut some yourself if you
have an acceptable material lying around.  With a regular or US finbox, you
just fold it around both sides of the fin base and insert it with the fin into
the finbox.  Not enough?  Try adding a second one.  It should be sized so that
when inserted all the way into the box with the fin, it comes right to the edge
of the finbox but does not protrude from it.
-------------------------------------------------------------------------------
     Marc Guido                    /\_/\_~_/\~         Lake Champlain
     Saratoga Springs, NY            \  \              Saratoga Lake
     Adirondack Boardsailing Club  ^^^^^^^^^^^^        Great Sacandaga Lake
-------------------------------------------------------------------------------
           Bic, Neil Pryde, Chinook, Hatteras Product, Bare
-------------------------------------------------------------------------------

 
 
 

shimming loose fins-how?

Post by Colas Nahab » Fri, 02 Dec 1994 21:29:19

Quote:

> Well, the subject line pretty much says it all.  What do
> you use to shim your fin when it gets wobbly?

take some hard plastic film (book covers, mylar strip...)
cut pieces to put alongside your fin base
glue them with superglue, apply pressure
try to cut a small bevel to ease entry/removal
always put lubricant (petroleum jelly, vegetable oil, silicon...) before
    inserting the fin.

This ways, the platic stayed glued to the fin and you can adjust your fin
or remove it without having to add new films...

--

 
 
 

shimming loose fins-how?

Post by Harold Blakn » Fri, 02 Dec 1994 18:04:03

Quote:


>Subject: shimming loose fins-how?
>Date: Wed, 30 Nov 1994 20:08:39 GMT
>Well, the subject line pretty much says it all.  What do
>you use to shim your fin when it gets wobbly?
>Rae

Chinook boxes:
A plastic milk jug cut up into strips. Different parts of the jug may vary in
thikness. Depending on how the fin/box is worn may determine how the fin needs
to be shimmed (the side or possibly in the bottom of the box). Some of old
fins I use won't bottom out in the box so I sometimes need a couple of layers
of plastic between the fin and the bottom of the box so the***will tighten
down. A quick way I use to shim the side of the fin is to use a large section
of plastic held along the side of the fin as it is pivoted down then take a
knife to trim the excess plastic at same level as the box.

Harold

 
 
 

shimming loose fins-how?

Post by Craig Goud » Sat, 03 Dec 1994 01:13:30

Quote:

>Well, the subject line pretty much says it all.  What do
>you use to shim your fin when it gets wobbly?
>Rae

First of all I assume this is a Chinook box, if your fin is wobbly in a
Tuttle (or Tuttle like box) you should be able to tighten it up by
tightening up the screws.

Best stuff, aluminum from a Coors Light beer can.  In fact, if I use a full
one then I'm not forced to drink the foul stuff.  Sharp aluminum edges could
cut you *** though so be careful.

Other stuff, Shred Tech makes "fin shims" out of high density plastic
in varying thicknesses but they are not not quite as high a density as
aluminum so you don't get quite as solid a shim connection.

Milk carton plastic works in a pinch, but makes the fin a little mushy.

Last resort, duct tape, it at least damps out the fin vibration which
causes spin out.  

Good luck,

Craig

8'4" CFX Wave Slalom, 9'4" Progressive Composites Course Slalom
Wt 160#, Ht 6'3", Usually sail on high desert lakes near SLC in Ut
Go short or go home

 
 
 

shimming loose fins-how?

Post by Jim Woo » Fri, 02 Dec 1994 19:43:41


writes:

Quote:
> Subject: shimming loose fins-how?
> Well, the subject line pretty much says it all.  What do
> you use to shim your fin when it gets wobbly?
> Rae

Be careful not to use too hard a plastic to shim...some boxes can get
larger if you shim really tight with a hard material of low flexibility.
I previously used mylar, and old Xray film, but it's too hard.  Thick poly
works fine, like .06mm plastic sheet, heavy duty plastic bag, etc. It's
cheap, easy to find, flexible, thin enough to get a good fit and easy to
trim once the fin is shimmed in.
 
 
 

shimming loose fins-how?

Post by Timothy Diera » Sat, 03 Dec 1994 04:31:54

Quote:

>Well, the subject line pretty much says it all.  What do
>you use to shim your fin when it gets wobbly?
>Rae

I use strips of mylar that one can find with most packaging.  I've also
heard of people cutting up aluminum cans.

Cheers...

Tim
Berkeley CA

 
 
 

shimming loose fins-how?

Post by Alan Ball » Sat, 03 Dec 1994 04:40:37

: Well, the subject line pretty much says it all.  What do
: you use to shim your fin when it gets wobbly?
: Rae
 
 
 

shimming loose fins-how?

Post by Chris Stephe » Sat, 03 Dec 1994 19:14:22

Quote:
>Well, the subject line pretty much says it all.  What do
>you use to shim your fin when it gets wobbly?
>Rae

Cut a piece from a plastic fizzy drinks bottle. This works a treat as
the stuff is really strong and doesn't tear when you shove the fin in.

Its strength isn't so surprising when you realise that although the label
might say it's made from PET (polyethylene terephthalate), that's just
another name for mylar. Which is just dacron or polyester in sheet form
instead of woven. The wonders of science!

"Gotta gecko" Chris
 -----

BT Business Communications  tel:   +44 1473 227945
Ipswich, GB                 fax:   +44 1473 231997

 
 
 

shimming loose fins-how?

Post by Mr Bruce Albert Cotse » Sat, 03 Dec 1994 20:58:43

Quote:

>Well, the subject line pretty much says it all.  What do
>you use to shim your fin when it gets wobbly?
>Rae

Plastic coke bottles, margarine containers, coke tins, bits of old mylar
sailcloth, toothpaste tube, WHY.

Needs must

Bruce C.

 
 
 

shimming loose fins-how?

Post by Wilhelm Eickho » Sun, 04 Dec 1994 08:58:21

 As an emergency loose fin cure I have used a rectangle cut out
 of a stiff plastic bag. Any junk food packaging will do.
 fold this over the fin fitting and push it in.
 For a more permanent cure use a rectangle cut from an alum.
 beer can. You can glue this to the fin if its a nice fit.
 P.s.: drink the beer before you start cutting.

Bill from Oz

 
 
 

shimming loose fins-how?

Post by EDykst » Mon, 05 Dec 1994 08:15:07


writes:

Quote:
>Well, the subject line pretty much says it all.  What do
>you use to shim your fin when it gets wobbly?
>Rae

Rae,

I just finished reading all the responses to your thread and I know my
suggestion beats
them all!

I scammed a large roll of dry-wall tape from Dad's garage and haven't had
a loose fin since.

The trouble with any plastic or metal solution is that you will have
trouble aligning the shim
or cutting it to shape. Also, if its too big, it will cause an irregular
flow and you may have
cavitation (spinout) problems. As well, obtaining the right thickness is
difficult with metal
and plastic. You'll end up with a different shim for every board-fin
combination you have.

I simply take a strip of dry-wall tape (actually - it has no
adhesive...why do they call it tape?)
about 10" long and fold it twice (to obtain 3 thicknesses) and lay it
across the Chinook slot
just before I hinge the fin down into it. If 3 thicknesses is too much,
simply pull the fin back
and rip off a piece of the tape. After you've snugged up the fin screw,
use your screwdriver
to scrape away the excess. (It rips off very easily)

The best feature of this solution is that when the paper gets wet, it
swells and gets even
snugger! A $2.00 roll should last you for 10 seasons.

Happy trails!

Eric Dykstra

 
 
 

shimming loose fins-how?

Post by Robert Gerad » Tue, 13 Dec 1994 03:33:10

Another alternative that works GREAT is using mylar sheets.  I use a
sheet of overhead projector mylar (can already be used) and cut it into
rectangles that I can double/triple..etc up as a shim.  The mylar is
flexible enough that you simply wrap it around that base of the fin
and press into place!  Once you have your fin in place, t*** is a
snap with an exacto knife!!

I have used this method for years without a problem.  Gets your fins
nice and stiff in the box.

Rob

Quote:


>>Subject: shimming loose fins-how?
>>Date: Wed, 30 Nov 1994 20:08:39 GMT

>>Well, the subject line pretty much says it all.  What do
>>you use to shim your fin when it gets wobbly?
>>Rae