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An enlarged oil cooler was likewise needed on the other side. The engine drove a fixed-pitch wooden propeller of 10 feet (3.0 m) diameter. This was some 8 inches (200 mm) less than the prototype, in order to try and keep the tip speed down and avoid drag from the creation of transonic shocks. This required an additional, fourth propeller blade. [1]
With the two-stage, two-speed supercharger, two sets of power ratings can be quoted. As an example, the maximum power generated by the Merlin 61 was 1,565 hp (1,167 kW) at 12,250 feet (3,730 m) (critical altitude) at M.S. speed, using + 15 lb/in² "boost". [7] The F.S. gear required approximately 200 hp (149 kW) to drive it.
Nominal horsepower = 7 × area of piston in square inches × equivalent piston speed in feet per minute/33,000. For paddle ships, the Admiralty rule was that the piston speed in feet per minute was taken as 129.7 × (stroke) 1/3.38. [29] [30] For screw steamers, the intended piston speed was used. [30]
The time it takes a vehicle to accelerate from 0 to 60 miles per hour (97 km/h or 27 m/s), often said as just "zero to sixty" or "nought to sixty", is a commonly used performance measure for automotive acceleration in the United States and the United Kingdom. In the rest of the world, 0 to 100 km/h (0 to 62.1 mph) is used.
1.0 km/h (0.62 mph) km/h mph; Imperial & US customary: mile per hour: mph mph 1.0 mph (1.6 km/h) mph km/h; mile per second: mi/s mi/s 1.0 mi/s (1.6 km/s) mi/s km/s; foot per second: ft/s (foot/s) ft/s long code "foot/s" outputs foot per second (and never feet) 1.0 ft/s (0.30 m/s) ft/s m/s (foot/s m/s) furlong per fortnight: furlong per ...
Detroit — A teenager drove nearly 140 miles per hour just days before a high-speed crash in ... Police say Tague was driving over 100 mph on a residential street where the speed limit was 25 mph.
Speeds of all-metal monoplanes of the 1930s jumped to 440.6 mph (709.1 km/h) with the Macchi M.C.72 floatplane. [16] The Messerschmitt Me 209 V1 set a world speed record of almost 756 km/h (470 mph) on 26 April 1939, [17] and the Republic XP-47J (a variant of the P-47 Thunderbolt) is claimed to have reached 504 mph (811 km/h). [18]
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