Tartan 4100, Owner'S Manual, Page: 21 / 54

T4100 OM rev2
Page 17 of 50
3.0 CONSTRUCTION
3.1 Hull
The hull of the Tartan 4100 is a single unit fiberglass molding which incorporates a specially developed
NPG/ISO gelcoated hull with a resin infused epoxy laminate. Alternating layers of strand mat and mulit-
axial glass in Epoxy resin are locally reinforced and cored with closed cell synthetic foam in order to
achieve an optimum balance of strength, stiffness and weight in the laminate composite.
The construction process ensures the complete weaning of the laminate complex with no voids or
bubbles. Extra laminate is used in any area that would be subject to additional stresses. The exterior
finish consists of gelcoat molded into the fiberglass. The boot stripe is applied using PPG Concept
Acrylic Urethane while the cove stripe is a premium vinyl film. A synthetic foam core is sandwiched
between the laminate layers to add significant strength and stiffness properties to the hull, and yet
ensuring that overall weight is kept to a minimum. The strength/weight characteristic of the sandwich
composite as well as resistance to impact and abrasion is magnified by the use of multi-axial glass in the
laminate.
3.2 Deck
The deck and cockpit, like the hull, is a single unit fiberglass molding with a gelcoat surface. A balsa
core is incorporated into the structure between the laminate layers for additional stiffness. A non-skid
finish is molded into the working areas of the deck.
3.3 Hull / Deck Joint
The top flange of the hull is capped with marine adhesive sealant. The deck is then fitted and fastened
through the Teak or Aluminum toerail by means of stainless steel bolts. As the bolts are tightened, the
sealant is forced into exposed crevices. If a leak should ever develop in the hull / deck joint, the through
bolts may be tightened accordingly.
3.4
Rudder & Steering
The rudder is constructed of two molded composite shells, which are bonded together and injected with
two-part foam for added strength. The rudderpost is carbon fiber with a reinforcing web positioned
within the rudder.
Wheel steering is standard. The pedestal system is a smooth operating Compact Rack & Pinion Lewmar
steering system. The pedestal manufacturer has provided maintenance instructions concerning the
steering system.
3.5 Ballast
The keel of your Tartan Yacht is of lead alloyed with antimony for added strength and cast to exacting
tolerances. In addition to providing the yacht's stability, the foil shape of the keel produces hydrodynamic
lift while sailing to weather, enhancing upwind performance.
The keel is fastened to the hull by means of stainless steel bolts, which are cast into the lead. These bolts
project through the bottom of the boat and are bedded with sealing material to prevent water leaks. The
bolts are secured by stainless steel nuts and washers, which are visible in the bilge.