making waves cape town WAVES ARE BEING MADE DOWN SOUTH AT THE CAPE OF STORMS
MONOHULL SAILING WILL NEVER BE THE SAME AGAIN...

Mechanical Canting Keel

Wikipedia informs that in 1981 a canting keel system was first patented. During the 90s a further patent (by CBTF Technologies) of their hydraulic canting keel system was granted. Increasingly during the 21st century, racing boat specifications specified a hydraulic canting keel system. Hydraulic powered systems were however not without technical problems. Reports began appearing on the web of failure of hydraulics and fracturing/cracking of the hull-keel interfaces. In essence - keels were falling off!

A constant source of energy is required to both reposition and maintain the hydraulically powered canting keel in its fixed position. Mechanical canting keel utilising actuators addresses the above problems. Keel is canted utilising a worm-gear actuator which is inherently 'self-locking'. Plainly stated - once the keel is relocated to a new position, it stays there - no energy is required to maintain a given attitude.

Design of mechanical canting keel which includes a longitudinal shaft which articulates with multiple bulkheads and the canting mechanism, reduces the risk of structural failures so often seen with the hydraulic canting systems. This longitudinal shaft, by articulating with the multiple bulkheads and the canting mechanism, imparts a longitudinal 'stiffness' to the hull wherein canting mechanism and hull become 'one'.

Design incorporates a second 'back-up' locking mechanism wherein locking pins absorb the energy associated with pounding thereby reducing the wear-and-tear of the worm-gear.

Design facilitates the easily demounting of keel apparatus from hull. Ease of disassembly permits a stowage of a 40' 'canter' and keel in a 40' shipping container. The notion then of transporting a fleet of 40' 'canters' from one venue to the next, participating in a World 40' Maximo Offshore/Inshore Series is exciting. Imagine the road-show 'circus' commences racing in Newport then translocates across the Atlantic to Istanbul, the next leg being through the Suez Canal in Oman whereupon the 'fleet' of containers is shipped either south to Cape Town or New Zealand...

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Keel Canted Perspective
Keel Perspective 1
Keel Perspective 2
Cable Drive Mechanism Detail
Keel Complete with Ballast Bulb
Rear View
Keel Assembly Positioned in Hull
View 1
Keel Assembly Positioned in Hull
View 2
Worm Drive & Locking Mechanism
Detail
Keel Canting Mechanism
Section View
Keel Double Enveloping
Worm Gear
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KEEL
Mechanical Canting Keel
DAGGERBOARDS
HULL
Bi-Planar Hull
Forward-Looking 3D Sonar
Propulsion
Deck and Cockpit
Water-Making
RIGGING
Topmast - Backstay Configuration
Mechanical Canting Mast
BALLAST BULB
Foiled
Compartmentalised
Adjustable
Ballast
FLOW SIMULATION VIDEOS
  CONTACT
The developments described are the subject of South African Patent Application Numbers 2015/03490 & 2015/03491
PCT (Patent Cooperation Treaty) WO 2016/185356 & WO 2016/185357
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