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The RQ-3 DarkStar (known as Tier III-or "Tier three minus" during development) is an unmanned aerial vehicle (UAV). Its first flight was on March 29, 1996. Its first flight was on March 29, 1996. The Department of Defense terminated DarkStar in January 1999, after determining the UAV was not aerodynamically stable and was not meeting cost and ...
Retrieved from "https://en.wikipedia.org/w/index.php?title=RQ-3_Darkstar&oldid=874041488"This page was last edited on 16 December 2018, at 19:38
In December 2014, NASA awarded Lockheed Martin a contract to study the feasibility of building the SR-72's propulsion system using existing turbine engine technologies, The $892,292 (~$1.13 million in 2023) contract funded a design study to determine the viability of a TBCC propulsion system by combining one of several current turbine engines, with a very low Mach ignition Dual Mode Ramjet (DMRJ).
Polecat is a twin engine, swept wing and designed very much like a miniature B-2. Dark Star is single engined and straightwinged. Development of Polecat didn't begin until mid-2004, after the "mature" RQ-3 was supposed to have been flown in Iraq. Akradecki 13:23, 24 August 2006 (UTC)
Just as the points (cos t, sin t) form a circle with a unit radius, the points (cosh t, sinh t) form the right half of the unit hyperbola. Also, similarly to how the derivatives of sin(t) and cos(t) are cos(t) and –sin(t) respectively, the derivatives of sinh(t) and cosh(t) are cosh(t) and +sinh(t) respectively.
Ptolemy's theorem states that the sum of the products of the lengths of opposite sides is equal to the product of the lengths of the diagonals. When those side-lengths are expressed in terms of the sin and cos values shown in the figure above, this yields the angle sum trigonometric identity for sine: sin(α + β) = sin α cos β + cos α sin β.
Dark star (Newtonian mechanics), a star that has a gravitational pull strong enough to trap light under Newtonian gravity Dark star (dark matter), a star heated by annihilation of dark matter particles within it
In 1999, director Tran Anh Hung invited Hai Yen, only 17 at that time, to play a role in the film The Vertical Ray of the Sun (Vietnam/France). [3]In 2000, Hai Yen appeared again in the film Song of the Stork (Vũ khúc con cò), a co-production between Vietnam and Singapore, directed by Nguyễn Phan Quang Bình (Vietnam) and Jonathan Foo (Singapore).