- 行业: Aviation
- Number of terms: 16387
- Number of blossaries: 0
- Company Profile:
Aviation Supplies & Academics, Inc. (ASA) develops and markets aviation supplies, software, and books for pilots, flight instructors, flight engineers, airline professionals, air traffic controllers, flight attendants, aviation technicians and enthusiasts. Established in 1947, ASA also provides ...
A radar system installed in military aircraft to warn the pilot of an aircraft approaching from behind.
Industry:Aviation
A radial engine with two rows of cylinders whose pistons are connected to a single crankshaft.
The crankshaft of a double-row radial engine has two throws, 180° apart. The master rod for the front row of cylinders attaches to one throw, and the master rod for the rear row of cylinders attaches to the other throw. Most double-row radial engines have either 14 or 18 cylinders.
Industry:Aviation
A radio antenna capable of receiving or transmitting a broad band of frequencies.
Industry:Aviation
A radio antenna that produces a maximum signal strength in two directions.
Industry:Aviation
A radio antenna that receives or transmits signals from all directions with equal strength.
Industry:Aviation
A radio antenna whose electrical length is one half of the wavelength of the frequency for which the antenna is tuned.
Industry:Aviation
A radio antenna whose length is one quarter of the wavelength of the frequency for which the antenna is used.
Industry:Aviation
A radio receiver designed and built primarily for receiving voice or coded radio transmissions. Communications receivers have good selectivity and sensitivity but they do not receive music with a great deal of fidelity.
Industry:Aviation
A radio receiver equipped with a direction-sensing antenna used to take bearings on a radio transmitter.
Specialized radio direction finders are used in aircraft as navigation aids. Others are ground-based, primarily to obtain a fix on a pilot requesting orientation assistance or to locate downed aircraft. A location fix is established by the intersection of two or more bearing lines plotted on a navigational chart, using either two separately located direction finders to obtain a fix on an aircraft or by a pilot plotting the bearing indications of his DF on two separately located ground-based transmitters, both of which can be identified on his chart.
UDFs receive signals in the ultrahigh frequency radio broadcast band, VDFs in the very high frequency band, and UVDFs in both bands.
ATC provides DF service at those air traffic control towers and flight service stations listed in the Airport/Facility Directory and the DOD/FLIP IFR En Route Supplement.
Industry:Aviation
A radio transmitting antenna that concentrates its radiation into a narrow beam. This beam can be oriented in any direction needed.
Industry:Aviation
