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He surveyed the approaches, and planted a mangonel at the southeast corner. Its weight was 150 catties (over 200 lbs./440 kg) and when the machinery was discharged, the noise was said to shake heaven and earth. It broke down all before it, and pierced the ground to a depth of seven feet (2 m).
Related units include the picul, equal to 100 catties, and the tael, which is 1 ⁄ 16 of a catty. A stone is a former unit used in Hong Kong equal to 120 catties and a gwan ( 鈞 ) is 30 catties. Catty or kati is still used in Southeast Asia as a unit of measurement in some contexts especially by the significant Overseas Chinese populations ...
A typical turbocharged V8 diesel engine might have an engine power of 250 kW (340 hp) and a mass of 380 kg (840 lb), [1] giving it a power-to-weight ratio of 0.65 kW/kg (0.40 hp/lb). Examples of high power-to-weight ratios can often be found in turbines.
The Hong Kong SAR continues to use its traditional units, now legally defined based on a local equation with metric units. For instance, the Hong Kong catty is precisely 604.789 82 g . Note: The names lí ( 釐 or 厘 ) and fēn ( 分 ) for small units are the same for length, area, and mass; however, they refer to different kinds of measurements.
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It is also known as the stiffness to weight ratio or specific stiffness. High specific modulus materials find wide application in aerospace applications where minimum structural weight is required. The dimensional analysis yields units of distance squared per time squared. The equation can be written as:
Vehicle Liftoff Mass Payload Mass to LEO Mass ratio Payload fraction Falcon 9 Block 5: 549,054 kg + 22,800 kg 22,800 kg 25.1 3.99% Proton-M: 705,000 kg + 23,000 kg
The Wilks formula, like its predecessors (the O'Carroll [3] and Schwartz [4] formulas), was set up to address the imbalances whereby lighter lifters tend to have a greater Power-to-weight ratio, with lighter lifters tending to lift more weight in relation to their own body-weight.