Sabre Hull Engineering

Hello I’m Glenn Campbell engineering
manager at Sabre yachts. Today I’d like to discuss what it takes when Sabre
Yachts designs the hull bottoms for a boat that will go 30-plus knots in open
ocean We begin by looking at some key
dimensions and properties of the vessel and with those properties and
predicted speed with the vessel travel at, we use that in combination with a
ISO standard 12215. We build to a category B based on that ISO standard
which is offshore rating, it’s 14 + foot seas and 40-knot sustained winds. Bottom
pressures are normally from this and they range usually at 9 to 12 psi or
13 to 17 hundred pounds per square foot and then with that information we then
design a laminate of our hulls right here we have our spread sheets that will withstand those forces, those forces are then also looked at from the internal structure to make sure
that the structure supporting the skins of the hull can withstand that For best performance we use a sandwich
construction for our hull, it’s pretty much like an i-beam we have a sample right here
wich has an inner and outer high strength fiberglass skin, which is analogous to
the flanges of an i-beam, and then a corecell brand foam core that acts like the web
of the i-beam being very stiff, strong, lightweight structure From there we use a VIP vacuum infusion
process where we use literally a full atmosphere of vacuum on our molded
pot to draw beneth a bag all of the resin system into and thoroughly
wet out the layers of reinforcement fibers of our molded pot or hull
including the core it’s effectively void free.
This method creates a very consistent, repeatable and optimized
fiber to resin ratio for the best strength properties

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