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In flight a powered aircraft can be considered as being acted on by four forces: lift, weight, thrust, and drag. [1] Thrust is the force generated by the engine (whether that engine be a jet engine, a propeller, or -- in exotic cases such as the X-15-- a rocket) and acts in a forward direction for the purpose of overcoming drag. [2]
[4] [5] He was a pioneer of aeronautical engineering and is sometimes referred to as "the father of aviation." [3] He identified the four forces which act on a heavier-than-air flying vehicle: weight, lift, drag and thrust. [6] Modern aeroplane design is based on those discoveries and on the importance of cambered wings, also proposed by Cayley ...
[2] He was the first true scientific aerial investigator to publish his work, which included for the first time the underlying principles and forces of flight. [ 16 ] In 1809 he began the publication of a landmark three-part treatise titled "On Aerial Navigation" (1809–1810). [ 17 ]
The formation consists of a flight of four aircraft, consisting of a "lead element" and a "second element", each of two aircraft. When viewing the formation from above, the positions of the planes resemble the tips of the four fingers of a human right hand (without the thumb), giving the formation its name.
The specific characteristics of a putative fifth force depend on which hypothesis is being advanced. No evidence to support these models has been found. The term is also used as "the Fifth force" when referring to a specific theory advanced by Ephraim Fischbach in 1971 to explain experimental deviations in the theory of gravity. Later analysis ...
Wall Street strategists predict S&P 500 gains in 2025 amid four key market themes. Trump's tariffs could spark trade wars, affecting inflation, while rate cuts from the Fed are viewed as integral.
A North Carolina father was arrested Monday after allegedly storming into a high school and choking a teenage student in a caught-on-video attack. Quinton Lofton, 43, was charged with felony ...
Spacecraft flight dynamics is the application of mechanical dynamics to model how the external forces acting on a space vehicle or spacecraft determine its flight path. These forces are primarily of three types: propulsive force provided by the vehicle's engines; gravitational force exerted by the Earth and other celestial bodies; and ...