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A metric ISO screw thread is designated by the letter M followed by the value of the nominal diameter D (the maximum thread diameter) and the pitch P, both expressed in millimetres and separated by a dash or sometimes the multiplication sign, × (e.g. M8-1.25 or M8×1.25). If the pitch is the normally used "coarse" pitch listed in ISO 261 or ...
A mathematical constant is a key number whose value is fixed by an unambiguous definition, often referred to by a symbol (e.g., an alphabet letter), or by mathematicians' names to facilitate using it across multiple mathematical problems. [1]
2<D<2.3: Pyramid surface: Each triangle is replaced by 6 triangles, of which 4 identical triangles form a diamond based pyramid and the remaining two remain flat with lengths and relative to the pyramid triangles. The dimension is a parameter, self-intersection occurs for values greater than 2.3. [33]
The reduced-smoke motor propelled the missile from the launcher with a barely visible smoke trail, accelerating the missile to 600 mph (970 km/h; 270 m/s) in under 1.5 seconds. [7] On 12 April 2006, the Spike was launched at a 2-meter diameter target from 1,000 meters, impacting 8 in (200 mm) from the center. [8] In May 2007, the Spike was ...
The taper rate for all NPT threads is 1 inch of diameter in 16 inches of length (3 ... 7.85: 1.25631 0.9845 1.315 33.4010 1 + 5 ...
Further development of this concept has resulted in the "air-spike". [1] This is formed by concentrated energy, either from an electric arc torch or a pulsed laser, projected forwards from the body, which produces a region of low density hot air ahead of the body.
3.7 m – leg span of a Japanese spider crab; 3.7 m – length of a southern elephant seal, the largest living pinniped; 5 m – length of an elephant; 5.2 m – height of a giraffe [122] 5.5 m – height of a Baluchitherium, the largest land mammal ever lived; 6.5 m – wingspan of Argentavis, the largest flying bird known
Thermal choking of the exhaust is avoided by having a relatively high supersonic air velocity at combustor entry. Fuel injection is often into a sheltered region below a step in the combustor wall. The Boeing X-43 was a small experimental ramjet [30] that achieved Mach 5 (1,700 m/s; 6,100 km/h) for 200 seconds on the X-51A Waverider. [31]