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  #1  
Old 11-15-2017, 10:57 AM
JackinMichigan's Avatar
JackinMichigan JackinMichigan is offline
 
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Default Air to ground frequency

I took my RV-10 up on its first flight this past Saturday, and I was talking to my father on the ground with a handheld tuned to 123.45. Mostly I was keeping him informed as to what I was doing and how the plane was behaving, but 10 minutes in someone broke in with a curt 'Get off this frequency!'

It's my understanding that 123.45 (known as 'fingers' apparently) is reserved for air-to-air and civilian flight testing, so I'm not sure who I was intruding on or if that person had any business telling me what he did.

What's the proper frequency I should be using to communicate with my ground crew while flight testing?
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  #2  
Old 11-15-2017, 11:20 AM
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He was the jack@ss. 123.45 is used for flight test, along with several other frequencies. He was the one who was breaking the law.
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  #3  
Old 11-15-2017, 12:36 PM
flyinga flyinga is offline
 
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From another forum:

Inside the contiguous 48 United States, 123.45 is NOT a valid air-to-air frequency. It is assigned to flight test for various airplane manufacturers by the FCC.

Ref: 47 C.F.R. ? 87.303(a) for 123.45 MHz
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  #4  
Old 11-15-2017, 12:46 PM
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Just to clarify, before you use 123.45 you need to have it assigned to you. You may have been stepping on someone's flight test communication.
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  #5  
Old 11-15-2017, 01:18 PM
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Fixed wing aircraft air-to-air is 122.750

https://www.radioreference.com/apps/db/?aid=7758
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  #6  
Old 11-15-2017, 01:27 PM
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Mark Dickens Mark Dickens is offline
 
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Quote:
Originally Posted by keen9a View Post
Just to clarify, before you use 123.45 you need to have it assigned to you. You may have been stepping on someone's flight test communication.
I had never heard that. I had always heard that it was for use by aircraft manufacturers for test purposes, but I'd never heard it had to be assigned to you. Where is that stated in the law or rules? Always looking to learn!
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  #7  
Old 11-15-2017, 01:41 PM
Bevan Bevan is offline
 
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For the Canadians monitoring this thread: In Canada, 123.45 Mhz is an air to air frequency for use in Canadian Northern Domestic airspace and the North Atlantic.

Bevan
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  #8  
Old 11-15-2017, 02:21 PM
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Ironflight Ironflight is offline
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Quote:
Originally Posted by Mark Dickens View Post
I had never heard that. I had always heard that it was for use by aircraft manufacturers for test purposes, but I'd never heard it had to be assigned to you. Where is that stated in the law or rules? Always looking to learn!
https://www.faa.gov/documentLibrary/...%20Chg%201.pdf

Scroll down to about the fourth page, paragraph 908: SPECIAL USE OF 123.45. It's used for Fight test - but NOT for Air to Air. I know a couple of avionics engineers who have told me that they (their company) had the frequency assigned for a particular test, in a particular area, and then had guys romping along using it indiscriminately ruin their test.

Frequency allocation is one area where everything is prohibited unless expressly permitted......
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  #9  
Old 11-15-2017, 02:24 PM
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Mark Dickens Mark Dickens is offline
 
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Quote:
Originally Posted by Ironflight View Post
https://www.faa.gov/documentLibrary/...%20Chg%201.pdf

Scroll down to about the fourth page, paragraph 908: SPECIAL USE OF 123.45. It's used for Fight test - but NOT for Air to Air. I know a couple of avionics engineers who have told me that they (their company) had the frequency assigned for a particular test, in a particular area, and then had guys romping along using it indiscriminately ruin their test.

Frequency allocation is one area where everything is prohibited unless expressly permitted......
And I was just informed by a more informed friend that the FAA flight test folks use it to talk to ATC as well.
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RV-8 #81077 Super Slow Build
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First Flight 11/20/2016
https://www.marksrv8.com
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  #10  
Old 11-15-2017, 02:55 PM
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JackinMichigan JackinMichigan is offline
 
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So back to my original question - what frequency SHOULD I be using? If I need one assigned to me who does that, the FAA or the FCC? Who do I contact?
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