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Motor Boats and Yachting 1973 June 8:
..............The basic lay-up
on the Moonraker is 25oz on the bottom to just above the chine line and
11oz. from there upwards and over the superstructure. On the horizontal
surfaces of deck and cabin the laminate is split and 1/4 in. end-grain
balsa used in sandwich construction.
Up until recently the hull
laminate has
been chopped strand mat plus two layers of
12oz. woven roving laid up by hand, but now a spray lay-up process
is used.
First the pigmented gel coat is applied and then a single
layer of pigmented mat. Now the sprayer is
brought into action and deposits glass to the required weight up to the point
where the first layer of rovings is laid in. More sprayed glass and resin
provides a bond between it and the next woven roving, when the final
thickness of glass is deposited.
Spray
lay-up is a fast process and one which allows accurate amounts of resin to
be deposited with the glass but it does need a conscientious operator for
consistent
results. The builders are Lloyds Approved Moulders and
believe that their quality control section ensures satisfaction,as the
saying goes.
Round the transom and extending 8ft. forward of it each side
is a foam-filled stringer.
Engine
bearers consist basically
of two transverse girders laminated up from ply to a thickness of about 3
in. covered in 10oz. glassfibre all over and subsequently bonded in with
8oz. glassfibre. Running
longitudinally between the girders are steel
channels, bolted through the ply, on which the engines actually sit.
Tanks,
though made separately and thus not integral with the bottom, are bonded in
and provide further stiffening......... |