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BoatTechTV – Feathering Sailboat Propellers

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In the last episode of Boat TechTV we looked at the cornerstone of marine propulsion - the fixed pitch propeller. However there are many areas of Naval Architecture where the use of a fixed...

What is Cavitation?

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What is Cavitation? Search for cavitation and marine propeller on the Internet and you will be bombarded with descriptions of flow phenomena, pump operations, vapor pressure, noise, vibration and other such good terms. Most people...

Sailboats are supposed to be quiet

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Full scale noise trials onboard a sailboat Bruntons Propellers make two of the market leading types of sailboat propellers, the Varifold folding propeller and the Autoprop self pitching propeller. But what makes them so special? Well one of the...

Paddle Wheels as Propulsion for Ships

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The advent of steam saw many changes in the design of ships. For the first time ships were able to control where they sailed and could sail headfirst into weather they would normally have...