Kadey-Krogen Yachts 5814, Руководство пользователя

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©2008 Kadey-Krogen Yachts, Inc.
www.kadeykrogen.com
Subject to change without notice.
Krogen 58’ Manual, Hull 58014 Construction
15
A gradual transition in fiber reinforcement is provided between bi-directional and
unidirectional laminates.
Where sandwich panels with Airex or Pro balsa cores are used in way of mechanically
connected structures, gears, and equipment, a core effective in resisting flexure and
compression is inserted (i.e. Marine Plywood). The inserts are bonded to the skins or
faces of the sandwich and to the adjacent less effective core.
The ply of skin laminate in contact with each face of a core material is chopped-strand
mat. The mat is thoroughly impregnated with resin and the core is coated with resin
before lay up.
The hull bottom starts with a high-quality USA-made, Cook® gel coat, and then two
layers of fiberglass wet-out in premium vinylester resin to prevent osmotic blistering.
From the keel to above the waterline, the thick, highly impact-resistant, hull is solid
fiberglass, with Kevlar®-reinforced stem and stern bottom areas. The hull is supported by
full-length, foam cored fiberglass stringers. Solid mahogany replaces the foam core in
way of the engines to absorb mounting bolt loads and to add mass, reducing vibration
levels throughout the yacht. Lead ballast is placed in the hollow keel and fiberglassed
permanently in place.
Secondary Bonds
Secondary Bonds are kept to a minimum. Where Secondary Bonds are required, the
surfaces of cured laminate are fresh and free from wax, grease, dirt, and dust. The first
ply of the secondary lay up is chopped-strand mat. The final ply of laminate along the
bond line of the cured laminate is chopped-strand mat.
Quality Control
Barcol Hardness
Prior to removal from the mold, the laminate is checked with a Barcol hardness tester at a
suitable number of locations to determine the degree of cure. The Barcol hardness
number of the cured laminate measured on the surface with the gel coat is not less than
40.
Structural Details
General
Structural continuity is maintained and where changes in thickness or structural section
occur, they are gradual to prevent notches, hard spots and other structural discontinuities.
The ends of all internal structural members are to provide end-fixity and load
transmission to the supporting member.