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What is the proper location of a VOR antenna?
a. Locate this type antenna so that there is a minimum of structure between it and the ground radio stations. The antenna may be mounted on the top or bottom of the fuselage. It is not advisable to mount the antenna on the cowl forward of the windshield because a lightning strike might possibly blind the pilot.
What is the purpose of counterpoise?
Per FAA AC 150/5340-30H, Design and Installation Details for Airport Visual Aids, Paragraph 12.5 or as amended, “The purpose of the counterpoise or lightning protection system is to provide low resistance preferred paths for the energy of lightning discharges to enter the earth and safely dissipate without causing …
What is counterpoise grounding system?
In electronics and radio communication, a counterpoise is a network of suspended horizontal wires or cables (or a metal screen), used as a substitute for an earth (ground) connection in a radio antenna system.
Should a counterpoise be grounded?
A radial or counterpoise of copper wire is thousands of times better at conducting RF and vastly reduces losses, making for a more effective antenna. Answer: Don’t earth/ground the balun.
What’s the meaning of counterpoise?
noun. Definition of counterpoise (Entry 2 of 2) 1 : counterbalance. 2 : an equivalent power or force acting in opposition. 3 : a state of balance.
Why does adding radials to a 1/4 vertical antenna seem to increase the SWR?
Elevated radials are usually 1/4 wavelength because it’s a convenient resonant length, but even longer radials would be desirable if they didn’t make the overall antenna system reactive. But low SWR by itself tells us next to nothing about how well the antenna is performing.
What is the difference between VOR and Vortac?
A VORTAC combines the VOR and TACAN in one location. Civil users will use the VOR signals which have the same performance as ordinary VOR signals. In addition they use the DME from the TACAN. Effectively a VORTAC is like a VOR/DME.
How are VOR signals transmitted to an aircraft?
All antenna shown are VOR/glideslope antenna The signals produced by a VOR transmitter propagate 360° from the unit and are used by aircraft to navigate to and from the station with the help of an onboard VOR receiver and display instruments.
Many of the VORs are located along airways. The Victor airway system is built around the VOR navigation system. Ground VOR transmitter units are also located at airports where they are known as TVOR (terminal VOR). The U.S. Military has a navigational system known as TACAN that operates similarly to the VOR system.
Where does the direction of Vor come from?
VOR’s direction doesn’t come from the aircraft seeing where it comes from. VOR works by a pulsing omni-directional beacon and a sweeping narrow beacon. The pulse happens each time the sweep is north. Then the heading from the compass is used to see where the beacon is relative to the airplane.
What kind of radio waves are used for VOR?
VOR uses VHF radio waves (108–117.95 MHz) with 50 kHz separation between each channel. This keeps atmospheric interference to a minimum but limits the VOR to line-ofsight usage. To receive VOR VHF radio waves, generally a V-shaped, horizontally polarized, bi-pole antenna is used.