Abstract: A contra-rotating propeller (CRP) offers higher propulsion efficiency compared to a single propeller. This article presents a novel underwater CRP propulsion system that integrates a ...

Aquamaster-Rauma of Finland has secured an order for eight 3,000-kW Contaz propulsors, to be fitted to a pair of train/car ferries recently ordered by DSB Rederi AS in Denmark. The order is viewed as ...

When you're at an airport and see propeller aircraft, you likely think it is powered by a piston engine. This is usually true among smaller planes, like the Cessa 172 Skyhawk and the Piper Archer, or ...

A major VLCC newbuilding program is foreseen by market analysts who estimate that as many as 300 ships of this size must be replaced up to the end of the decade and into the next century. It should be ...

The Flying Pancake (at Floyd Bennett Field, New York, in the early 1940s). Rudy Arnold Photo Collection, NASM, SI 2009-1152 The two propeller shaft fairings emerging on either side of the round ...

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Russia appears to have fielded a new jet-powered attack drone, the Geran-5, which blurs the line between loitering munitions and cruise missiles. First identified from wreckage recovered near Kyiv and ...