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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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Ultra-quiet Muffler with Underwater Exhaust

Analysis

The following are some of the results of a wide range of analysis problems that have been completed over the last couple of years.  The problems include a high performance muffler which discharged underwater with a bypass leg above the waterline to the development of the water surface in a sea state 5.

Analysis

The following are some of the results of a wide range of analysis problems that have been completed over the last couple of years.  The problems include a high performance muffler which discharged underwater with a bypass leg above the waterline to the development of the water surface in a sea state 5.

Ultra-quiet Muffler with Underwater Exhaust

Ultra-quiet Muffler with Underwater Exhaust

Engine Data Results to determine Exhaust Flow & Water Injection requirements.

Engine Data Results to determine Exhaust Flow & Water Injection requirements.

Surface Representation of Sea State 5

Surface Representation of Sea State 5

As part of a simulation running in head seas the irregular sea surface can be developed to show the wave heights in relation to the vessel or multiple vessels.

Four Quadrant Propeller Curve for Double Ended Ferries and Dynamic Positioning Vessels

Four Quadrant Propeller Curve for Double Ended Ferries and Dynamic Positioning Vessels

Speed Trial Results

Speed Trial Results

Alternating Torque Estimate Comparing 4B to 5B Propellers.

Alternating Torque Estimate Comparing 4B to 5B Propellers.

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