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Fldigi (short for Fast light digital) [4] is a free and open-source program which allows an ordinary computer's sound card to be used as a simple two-way data modem.The software is mostly used by amateur radio operators who connect the microphone and headphone connections of an amateur radio SSB or FM transceiver to the computer's headphone and microphone connections, respectively.
The Tumansky R-13 is a development of the successful Tumansky R-11 engine. It is a two-spool axial-flow turbojet featuring a new five-stage high-pressure compressor, new combustion chamber design to facilitate restarting the engine at high altitudes, new afterburner, and greater use of titanium components.
Some enthusiasts have interest in owning, restoring and operating vintage military and commercial radio equipment such as those from 1940s to 1960s. Some undertake to construct their own gear, known in ham slang as homebrewing, using vintage parts and designs. A number of amateur radio clubs and organizations sponsor contests, events, and swap ...
STANAG 5066 (Profile for High Frequency (HF) Radio Data Communication) is a NATO Standardization Agreement specification to enable applications to communicate efficiently over HF radio. STANAG 5066 provides peer protocols that operate above an HF modem and below the application level.
The Tumansky R-25 was designed as a replacement for the Tumansky R-13 in MiG-21 fighters. The R-25 is a two-spool axial-flow turbojet with a new compressor with increased overall pressure ratio and airflow, variable two-stage afterburner, and greater use of titanium.
The longest continuing United States classified military airplane program is the testing and evaluation of Foreign Aircraft Technology. During the Cold War, secret test flying of Mikoyan-and-Gurevich Design Bureau (MiG) and other Soviet aircraft was an ongoing mission dating back to the acquisition of the first Soviet-built Yakovlev Yak-23 in 1953.
Concept art of MiG 1.44 in flight. The MiG 1.44 had its origins in the early 1980s, when the U.S. Air Force began developing a successor to the F-15 Eagle under the Advanced Tactical Fighter (ATF) project, which would eventually result in the supermaneuverable and stealthy, albeit costly, F-22 Raptor that first flew in 1997.
Near the end of the program, India began financing the development of the E-300 engine for use in the Indian HF-24 Marut jet fighter. The HA-300 was an ambitious and costly project for Egypt, at a time when it was seeking to expand both its civilian and defence aviation industry.