The Critical Mach number (Mcr) is the maximum Mach number (airspeed in relation to the speed of sound - Mach 1.0) which a subsonic aircraft can attain whilst still remaining controllable by the pilot. Mach number (Ma) is defined as a ratio of speed to the speed of sound in the medium in case. ... Mach number (Ma) is defined as a ratio of speed to the speed of sound in the medium in case. ... Subsonic has two possible meanings: A speed lower than the speed of sound is called subsonic. ... An aircraft is any machine capable of atmospheric flight. ... The word pilot has several meanings: In shipping, a pilot is someone who guides ships through the waters near a harbour, or especially narrow or otherwise dangerous coastal waters. ...

At the Critical Mach number, local airflow over the airframe reaches the speed of sound (due to the airflow speeding-up to go around various curvatures in the aircraft structure) and creates shock waves sufficient to affect the airflow over the control surfaces, resulting in a loss of control, although the aircraft itself may still be flying subsonically. For the vector animation platform, see Macromedia Shockwave. ...

Although unknown at the time, the Critical Mach number was the cause of the effect known as the 'sound barrier' which was being observed in the late 1930's/early 1940's. U.S. Navy F/A-18 at transonic speed. ...

Subsonic aircraft, e.g., Supermarine Spitfire, BF 109, P-51 Mustang, Gloster Meteor, Me 262, P-80 possess a Critical Mach number and are incapable of passing-through the 'sound barrier' Subsonic has two possible meanings: A speed lower than the speed of sound is called subsonic. ... The Supermarine Spitfire was a single seat fighter used by the RAF and many Allied countries in World War II. The Spitfires elliptical wings gave it a very distinctive look; their thin cross-section gave it speed; the brilliant design of Chief Designer R.J. Mitchell and his successors... (Bf 109 was the official Reichsluftfahrtministerium designation, though some late_war aircraft actually carried the Me 109 designation stamped onto their aircraft type plates. ... The North American P-51 Mustang was a successful long range fighter aircraft which entered service in the middle years of World War II. The definitive version of the single-seat fighter was powered by a single supercharged V-12 Merlin engine and armed with six . ... The Gloster Meteor was the RAFs first jet fighter aircraft, introduced into service only weeks after the Messerschmitt Me 262 in August 1944. ... The Messerschmitt Me 262 Schwalbe (Swallow) was the first operational jet powered aircraft. ... The Lockheed P-80 Shooting Star was the first operational jet fighter used by the United States Army Air Force. ...

Transonic aircraft, e.g., Hawker Hunter, F-86 Sabre are designed to have no Critical Mach number and while not possessing sufficient engine power to do so in level flight, can be dived to above the speed of sound and remain controllable. Transonic is an aeronautics term referring to a range of velocities just below and above the speed of sound. ... The Hawker Hunter was a British jet fighter aircraft of the 1950s. ... F-86 Sabre at Oshkosh, 2003 The first proposals for the North American Aviation F-86 Sabre were made in 1944, but construction was not begun until after World War II. The XP-86 prototype, which would become the F-86 Sabre, first flew on October 1, 1947. ... The speed of sound c (from Latin celeritas, velocity) varies depending on the medium through which the sound waves pass. ...

Likewise, supersonic aircraft, e.g., English Electric Lightning, Lockheed F-104, Mirage III, MiG 21 have no Critical Mach Number, being designed to exceed the speed of sound in level flight and having the engine power to do so. This page is about high speed motion of bodies such as airplanes through air or other fluids. ... The English Electric Lightning was a supersonic British fighter aircraft of the Cold War era, particularly remembered for its natural metal exterior that was used throughout much of its service life with the Royal Air Force and the Royal Saudi Air Force. ... The Lockheed F-104 Starfighter was the last of the day fighters, a high-performance supersonic interceptor aircraft capable of high speeds and climb rates. ... Former South African Air Force Mirage IIICZ The Dassault Mirage III is a supersonic fighter aircraft designed in France during the 1950s, and manufactured both in France and a number of other countries. ... Mikoyan-Gurevich MiG-21 (NATO reporting name Fishbed) is a fighter aircraft, originally built by the Mikoyan and Gurevich Design Bureau in the Soviet Union. ...