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HMS Viper was a Viper-class torpedo boat destroyer (or "TBD") built for the British Royal Navy in 1899 by Hawthorn Leslie and Company at Hebburn on the River Tyne. She was notable for being the first warship to use steam turbine propulsion [ 2 ] and was manufactured by Parsons Marine .
049 engines run well on a 5×3 to 6×3 prop. A 5.7×3 APC works well. To get any suitable speed for mouse racing a 4-inch pitch prop is required at high revs but to do this plenty of nitro-methane is also required, for example, a 4.75 × 4 prop with 40% Nitro. Texaco engines are designed to use bigger props, e.g. 7×4.
The Viper 640 is an American trailerable sailboat, that was designed by Brian Bennett for racing and first built in 1996. [ 1 ] [ 2 ] [ 3 ] The Viper 640 is an accepted World Sailing class boat [ 4 ] and the official one-design boat of the Gulf Yachting Association for its Capdevielle Series .
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A ducted propeller, also known as a Kort nozzle, is a marine propeller fitted with a non-rotating nozzle. It is used to improve the efficiency of the propeller and is especially used on heavily loaded propellers or propellers with limited diameter. It was developed first by Luigi Stipa (1931) and later by Ludwig Kort (1934). The Kort nozzle is ...