Use enough 1 inch tape around the structure to cover the whole surface. No need
to overlap the unidirectional on the sides of the structure. If there is any
overlap arrange the strips so that the overlap is on top and bottom.
When using carbon braided tube on the outside of a tubular structure I usually
wet it with epoxy put it bunched up on a short larger diameter piece of pipe or
collar. Then pass the job through the pipe sliding the braided material off as
the collar is passed over the job. I clamp one end to an immovable object and
the other end is clamped with a stretched shock cord strap to maintain some
tension. Massage the braid towards the shock cord end to provide the tightest
neatest fit. Without final sanding the outer texture is grip-slip resistant
(e.g. for carbon tiller extensions). This stuff is very easy to use to get a
very nice outer effect when clear coated.
Greg
----- Original Message -----
From: Rob DesMarais, D.C.
To: 'Greg Ryan' ; swiftsolo@xxxxxxxxxxxx
Sent: Wednesday, December 21, 2005 4:25 PM
Subject: RE: Tiller Layup & Centerboard and Rudder layup
Thanks Greg -
Who has braided hybrid tubes? I've only seen carbon sleeves from Sweet?
When I purchased Carbon Tape, only 1 ½ was available. Is 3" now available?
To your health,
Rob
Subject: Re: Tiller Layup & Centerboard and Rudder layup
Tiller Layup,
In contact with the foam, one layer of hybrid braided tube or hybrid tape
(the bi-directional type). Two pieces of unidirectional 3 inch wide carbon tape
placed longitudinally, make the overlap on the top and bottom surfaces, then a
layer of carbon braided tube that extends 24 inches from the fat end towards
the thin end, and finally a layer of braided carbon tube on the outside.
Lightly sand smooth and cover the outside with 207special hardener / epoxy.
You can remove the foam internally with acetone if need be especially at the
forward and back ends. Fill the ends with epoxy 410/graphite to 1) strengthen
the joint to the cassette, 2) provide a small exit hole on the top front
surface for shock cord exit for the extension keeper system. Drill and ream a
hole in the underside of the tiller about 8-12 inches back from the front. You
can pass 2 pieces of shock cord through the tiller from the bottom hole and out
through the hole in the front of the tiller, connect to the extensions. Tension
the shock cord and tie a knot in the bottom just outside the hole.
Greg
PS Mark you received a 5 page illustrated handout on making CB and rudders
with your cores.
----- Original Message -----
From: Rob DesMarais, D.C.
To: swiftsolo@xxxxxxxxxxxx
Sent: Wednesday, December 21, 2005 2:48 PM
Subject: Tiller Layup
How many layers of carbon would you use or what is the recommend layup?
Rob
|