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Orbital photo of the Hadley-Apennine site; Apollo 15 landing site is marked with a circle. Hadley–Apennine is a region on the near side of Earth's Moon that served as the landing site for the American Apollo 15 mission, the fourth crewed landing on the Moon and the first of the "J-missions", in July 1971.
The DC-X, short for Delta Clipper or Delta Clipper Experimental, was an uncrewed prototype of a reusable single-stage-to-orbit launch vehicle built by McDonnell Douglas in conjunction with the United States Department of Defense's Strategic Defense Initiative Organization (SDIO) from 1991 to 1993.
As of October 2018, only the Delta IV remains in production. Single-stick versions of Delta IV was retired by United Launch Alliance (ULA) in 2019 and replaced by the ULA Atlas V, leaving the Delta IV Heavy the only remaining operational member of the Delta family, flying US national security missions.
Delta-v (also known as "change in velocity"), symbolized as and pronounced deltah-vee, as used in spacecraft flight dynamics, is a measure of the impulse per unit of spacecraft mass that is needed to perform a maneuver such as launching from or landing on a planet or moon, or an in-space orbital maneuver.
Delta Connection was founded in 1984 [1] as a means of expanding the Delta network to smaller markets via partnerships with regional airlines.. Atlantic Southeast Airlines (ASA) began Delta Connection service on March 1, 1984, from their hub at Hartsfield–Jackson Atlanta International Airport, and soon had a substantial presence at Delta's hub at Dallas Fort Worth International Airport.
A reference landing page presents information that is relevant to the visitor. These can display text, images, dynamic compilations of relevant links or other elements. [citation needed] The idea is to isolate the visitor in this landing page from any other distractions, like full website menu or "similar products", and surround the visitor with all available information about the targeted ...
The Thor-Delta, also known as Delta DM-19 or just Delta was an early American expendable launch system used for 12 orbital launches in the early 1960s. A derivative of the Thor-Able , it was a member of the Thor family of rockets, and the first member of the Delta family.
Cropped delta – tip is cut off. This helps maintain lift outboard and reduce wingtip flow separation (stalling) at high angles of attack. Most deltas are cropped to at least some degree. In the compound delta, double delta or cranked arrow, the leading edge is not straight. Typically the inboard section has increased sweepback, creating a ...