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An F/A-18 Hornet creating a vapor cone at transonic speed just before reaching the speed of sound. The Mach number ( M or Ma ), often only Mach, ( / mɑːk /; German: [max]) is a dimensionless quantity in fluid dynamics representing the ratio of flow velocity past a boundary to the local speed of sound. [1] [2] It is named after the Czech ...
A loaded march is a relatively fast march over distance carrying a load and is a common military exercise. A loaded march is known as a forced foot march in the US Army. Less formally, it is a ruck march in the Canadian Armed Forces and the US Army, a tab (Tactical Advance to Battle) in British Army slang, a yomp in Royal Marines slang ...
Supersonic speed is the speed of an object that exceeds the speed of sound ( Mach 1). For objects traveling in dry air of a temperature of 20 °C (68 °F) at sea level, this speed is approximately 343.2 m/s (1,126 ft/s; 768 mph; 667.1 kn; 1,236 km/h). Speeds greater than five times the speed of sound (Mach 5) are often referred to as hypersonic.
The standard pace is 60 paces per minute (88 for the FFL). Australian Army Slow Time is 70 paces per minute with a 75cm pace. British armed services Slow March is 65 paces per minute. Half Step March or Cut the pace: This is a U.S. march pace. It is at the same tempo as Quick Time, but instead of 30 inches, the step is 15 inches.
During the last decade of the 20th century, two Frenchmen, Éric Barone and Christian Taillefer, set the speed record descending on snow several times. On 28 March 2015, Éric Barone reached 223.3 km/h (138.8 mph) at Vars ski resort, France, besting his own record from 2000, using a specially designed prototype bicycle.
John Paul Stapp (July 11, 1910 – November 13, 1999) was an American career U.S. Air Force officer, flight surgeon, physician, biophysicist, and pioneer in studying the effects of acceleration forces on humans. [1] He was a colleague and contemporary of Chuck Yeager, and became known as "the fastest man on earth". [2]
The B-1 was first envisioned in the 1960s as a bomber that would combine the Mach 2 speed of the B-58 Hustler with the range and payload of the B-52, ultimately replacing both. After a long series of studies, North American Rockwell (subsequently renamed Rockwell International , B-1 division later acquired by Boeing ) won the design contest for ...
The Lockheed SR-71 Blackbird holds the official Air Speed Record for a crewed airbreathing jet engine aircraft with a speed of 3,530 km/h (2,190 mph). The record was set on 28 July 1976 by Eldon W. Joersz and George T. Morgan Jr. near Beale Air Force Base, California, USA. It was able to take off and land unassisted on conventional runways. [47]