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The momentum theory or disk actuator theory – a theory describing a mathematical model of an ideal propeller – was developed by W.J.M. Rankine (1865), A.G. Greenhill (1888) and R.E. Froude (1889). The propeller is modelled as an infinitely thin disc, inducing a constant velocity along the axis of rotation and creating a flow around the ...
A ship's variable-pitch propeller. A controllable pitch propeller (CPP) can be efficient for the full range of rotational speeds and load conditions, since its pitch will be varied to absorb the maximum power that the engine is capable of producing. When fully loaded, a vessel will need more propulsion power than when empty.
They produce many model car kits including road cars, sports racing cars, World Rally Championship cars, and Formula One racing cars. Usually these are 1/24 scale although the Formula One kits are 1/20 scale. A few street, racing, and F1 kits are also produced in 1/12 scale including the Ferrari 641/2, McLaren Honda MP4/6, and Williams Renault ...
One of the most astounding was the Mighty Antar truck hauling a large gold ship's propeller. A wide variety of military vehicles continued under production. A rival third range of model cars also appeared in 1959 called "Spot-on" which were manufactured in Northern Ireland and produced by Tri-ang, a division of Lines Brothers. This range was ...
Model of Emma Mærsk undergoing testing in a ship model basin. In marine engineering, a ship motion test is hydrodynamic test performed with ship models for the purpose of designing a new (full sized) ship, or refining the design of a ship to improve its performance at sea. [1] Tests are carried out in a ship model basin or "towing tank". [2]
Rotor ship E-Ship 1. A rotor ship is a type of ship designed to use the Magnus effect for propulsion. The ship is propelled, at least in part, by large powered vertical rotors, sometimes known as rotor sails. German engineer Anton Flettner was the first to build a ship that attempted to tap this force for propulsion. "The idea worked, but the ...