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May 11th, 2008, 14:11
| #1 |
| Old Skool  Join Date: Sep 2002 Location: Grand Forks, ND (UND)/ Davenport, IA
Posts: 2,204
|  Question about VORs How fast does the variable phase antenna spin? I know it's something trivial and is probably a "who cares" thing, but as a CFI, the question always comes up from my students. I've heard things like 30,000 RPMs, 3,000 RPMS, and everything in between. I'm thinking 30,000 RPMs sounds about right. It's my own theory that to cause something that travels at the speed of light to be received in different phases depending on where you are from the station, it would have to be spinning pretty darn fast.
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May 11th, 2008, 15:39
| #2 |
| Junior Member Join Date: May 2008 Location: bridgewater, va
Posts: 67
  | Re: Question about VORs 1800rpms this is the best site i've found on how the VOR works: http://www.southgatearc.org/articles/vor.htm |
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May 11th, 2008, 15:46
| #3 |
| Senior Member  Join Date: Oct 2000 Location: Murfreesboro, TN USA
Posts: 914
| Re: Question about VORs It's only 1800 RPM. 1800 rotations per minute divided by 60 seconds in a minute gives us 30 rotations per second, or 30Hz. edit: Ack! Too slow.
__________________ When seconds count, the police are only minutes away |
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May 11th, 2008, 17:52
| #4 |
| Old Skool  Join Date: Jun 2005 Location: Indiana
Posts: 1,928
| Re: Question about VORs A what spin... haha who's asking?!?!? and Why do they want to know? |
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May 11th, 2008, 22:58
| #5 | |
| Old Skool Join Date: Sep 2006 Location: Memphis, TN
Posts: 2,105
| Re: Question about VORs Quote:
__________________ Core Concepts of Flight If an error is corrected whenever it is recognized as such, the path of error is the path of truth --Hans Reichenback | |
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May 11th, 2008, 23:09
| #6 |
| Senior Member Join Date: Oct 2000 Location: Murfreesboro, TN USA
Posts: 914
| Re: Question about VORs They are. Newer Doppler VORs electrically rotate the signals.
__________________ When seconds count, the police are only minutes away |
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