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Cotty Fay Marine Design Inc.

11669 N Madison Avenue
Bainbridge Island WA 98110
(206) 963-0018
Marine Design Product Development & Propulsion System Integration Propellers High Speed Craft Naval Architecture Marine Engineering

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Cotty Fay Marine Design Inc.

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Propulsion System Integration

Propulsion System Integration is to ensure that the installed system meets or exceeds the expectations of the builder and customer.  The system is run through a simulation to determine fuel economy, acceleration, dynamic stability, etc.

Propulsion System Integration

Propulsion System Integration is to ensure that the installed system meets or exceeds the expectations of the builder and customer.  The system is run through a simulation to determine fuel economy, acceleration, dynamic stability, etc.

44 knot RIB Sterndrive Installation

44 knot RIB Sterndrive Installation

Twin 275 bhp Diesel Sterndrives

Pod Drive Installation

Pod Drive Installation

Structural Arrangement for Pod Drive in composite production motoryacht.

Structural Layout 43 ft Motoryacht

Structural Layout 43 ft Motoryacht

Completed support structure in prototype installation.

Typical Inboard Installation

Typical Inboard Installation

Conventional inboard installation with tunnel.  Integrated shaft, strut, propeller and rudder.

Installation Comparison

Installation Comparison

Comparison of two pod drive installations to evaluate weight and center of gravity shift.

Typical Engineroom Arrangement

Typical Engineroom Arrangement

Propeller Layout

Propeller Layout

3D Propeller model integrated into design to ensure adequate clearance and sizing of propulsion components.

Finite Element Model

Finite Element Model

Finite Element model of the shaftline for a 50M motoryacht.  Check all modes of vibration: longitudinal, lateral and torsional.

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