Page 46: of Marine News Magazine (June 2015)

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PROPULSION

Ducted Propulsion for

Inland River Towboats

Photo: Nautican

The mature concept provides proven ef? ciencies in a customized package for varied inland conditions.

By John Eckart he simple, yet highly effective design of what the ma- ally unchanged since the MARIN-developed designs worked rine industry knows today as the Kort nozzle, was ini- exceptionally well at generating increased thrust compared to tially developed by Luigi Stipa and Ludwig Kort in an open propeller of the same diameter. The MARIN nozzle

T the 1930’s. Later, the design was further re