Low density linear polyethylene is the most common
plastic used in the manufacturing of touring kayaks.
It is a fairly soft plastic and requires internal supports and careful
forming to keep its shape. Most manufacturers in the United States
build plastic touring kayaks by rotationally molding
linear polyethylene.
High density polyethylene is used by the Prijon
Co. in Germany. They "blow mold" their kayaks
in a system that results in a rigid hull that does not require internal
supports. The molds for this type of manufacturing are very costly,
so there are not as many different designs.
ABS Royalex is used by Pyranha Kayak Co.,
an English builder. Royalex boats are lighter in
weight and the hulls are nice and stiff.
Fiberglass kayaks are made by layers of fiberglass
cloth in a mold and impregnating it with a plastic resin. This creates
a light weight, stiff hull. The gel coats on fiberglass boats are
fairly delicate and can be damaged by hitting rocks, coral or oyster
beds.
Rudders
The true purpose of rudders on touring kayaks is
to help keep the kayak going straight, not to turn the boat. Turning
is done by a series of correction paddle strokes. These correction
strokes are used to keep the boat tracking in a straight line. However,
there are times when natural forces, such as a strong tail wind
or a following sea, will make it difficult to keep the boat on course
and this is when you want to use skeg or rudder.
Kayak Length
Entry level kayaks are offered in the 9 ft. to
10 1/2 ft. range. These are popular with kids or adults who are
going short distances or just crushing around in front of the lake
cottage. They are wide and stable and can be used for fishing, hunting
or bird watching. They do not offer much storage space and would
not normally be used for a long trip.
The next general length category would be a kayak
averaging 14 ft. to 15 ft. Most at this length are maneuverable
enough to be used in rivers with mild white water and are also great
for exploring the shoreline and covers of lakes. They are great
for day trips and short overnight trips and will usually have one
large hatch behind the cockpit for storing camping gear.