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Mercury-Redstone 2 launch carrying Ham, a chimpanzee, on 31 January 1961. The Mercury-Redstone Launch Vehicle, designed for NASA 's Project Mercury, was the first American crewed space booster. It was used for six sub-orbital Mercury flights from 1960–1961; culminating with the launch of the first, and 11 weeks later, the second American (and ...
Radio repeater. A radio repeater is a combination of a radio receiver and a radio transmitter that receives a signal and retransmits it, so that two-way radio signals can cover longer distances. A repeater sited at a high elevation can allow two mobile stations, otherwise out of line-of-sight propagation range of each other, to communicate. [1]
Redstone (rocket family) The Redstone family of rockets consisted of a number of American ballistic missiles, sounding rockets and expendable launch vehicles operational during the 1950s and 1960s. The first member of the Redstone family was the PGM-11 Redstone missile, from which all subsequent variations of the Redstone were derived.
Mercury-Redstone 3, or Freedom 7, was the first United States human spaceflight, on May 5, 1961, piloted by astronaut Alan Shepard. It was the first crewed flight of Project Mercury . The project had the ultimate objective of putting an astronaut into orbit around the Earth and returning him safely.
The Sparta (or Redstone Sparta) was a three-stage rocket that launched Australia's first Earth satellite, WRESAT, on 29 November 1967. [ 1 ] [ 2 ] [ 3 ] Sparta used surplus American Redstone rockets as its first stage, a Thiokol Antares 2 from Scout rocket as a second stage, and a WRE BE-3 Alcyone solid-propellant engine as a third stage.
PGM-11 Redstone. The PGM-11 Redstone was the first large American ballistic missile. A short-range ballistic missile (SRBM), it was in active service with the United States Army in West Germany from June 1958 to June 1964 as part of NATO 's Cold War defense of Western Europe. It was the first US missile to carry a live nuclear warhead, in the ...
The Evans repeating rifle is often considered to be one of the oddest rifles to ever be produced in the United States. The Evans was invented by Warren R. Evans, a dentist from Thomaston, Maine. With the help of his brother George, they perfected the rifle and started the "Evans Rifle Manufacturing Company" of Mechanic Falls, Maine in 1873.
Coaxial cavity RF filter at 2 meter repeater. An amateur radio repeater is an electronic device that receives a weak or low-level amateur radio signal and retransmits it at a higher level or higher power, so that the signal can cover longer distances without degradation. Many repeaters are located on hilltops or on tall buildings as the higher ...