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Electric boats for racing are capable of reaching speeds of more than 50 mph and run times of around 10 minutes. Electric boats also hold the 100-yard sprint record against rival internal combustion powerplants since 2000. Tethered racing and free-running craft were popular prior to the advent of cheap radio control.
While there are losses in the charge/discharge cycle and in the conversion of electricity to motive power, Rutter points out that most electric boats need only about 1.5 kW or 2 hp to cruise at 5 mph (8 km/h), a common maximum river speed and that a 30 hp (22 kW) petrol or diesel engine producing only 2 hp (1.5 kW) is considerably more ...
1:10 scale radio-controlled car (Saab Sonett II)A radio-controlled model (or RC model) is a model that is steerable with the use of radio control (RC). All types of model vehicles have had RC systems installed in them, including ground vehicles, boats, planes, helicopters and even submarines and scale railway locomotives.
The XF-12 was referred to as "flying on all fours" meaning: four engines, 400 mph (640 km/h) cruise, 4,000 mi (6,400 km) range, at 40,000 ft (12,000 m). [1] The aircraft was designed to maximize aerodynamic efficiency. Although innovative, the jet engine and the end of World War 2 made it obsolete, and it did not enter production.
The R-1 through R-20 boats were designed by Electric Boat and built by the company's subcontractor yards Bethlehem Quincy and Bethlehem San Francisco.These single-hull boats were structurally similar to the preceding O class, but larger and therefore with more powerful machinery to maintain the required speed.
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