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A very large thrust over a very short time will achieve a desired speed increase with little gravity loss. On the other hand, if a is only slightly greater than g, the gravity loss is a large proportion of delta-v. Gravity loss can be described as the extra delta-v needed because of not being able to spend all the needed delta-v instantaneously.
The Apollo command and service module (CSM) was one of two principal components of the United States Apollo spacecraft, used for the Apollo program, which landed astronauts on the Moon between 1969 and 1972.
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.
For his skill in landing the crippled aircraft, the captain, Jack McMahan, was awarded the FAA's Distinguished Service Award. [2] The aircraft was repaired and continued to fly for Delta until 1985. It was subsequently sold to American Trans Air, where it was registered with the tail number "N187AT". The aircraft was scrapped in 2002. [7]
The MD-80 series, the first derivative or the second generation of the DC-9 family, entered service in 1980.The aircraft series was originally designated as Series 80 or stylized as the Super 80, [5] which was a 14 ft 3 in (4.34 m) lengthened Series 50 with a higher maximum take-off weight (MTOW) and higher fuel capacity, as well as next-generation Pratt and Whitney JT8D-200 series engines and ...
Delta National Forest is a U.S. National Forest in western Mississippi, located in Sharkey County, and has an area of 60,898 acres (246.4 km 2). Delta is operated as the Sunflower Wildlife Management Area. The forest is headquartered in Jackson, as are all six National Forests in Mississippi, but Delta Ranger District office is located in ...
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.