[Milsurplus] NAVAIDS

[B. Smith]

It will be difficult to pinpoint a year that non directional beacons 
were established. They of  course become very popular when the aircraft 
"ADF" was established and the pilot could follow a bearing derived from 
the "Needle". However  much earlier there were antenna systems installed 
on aircraft that were fixed and the aircraft would be turned in flight 
left or right to obtain a bearing and then later loops that could be 
rotated by hand  could also be used.
k4che
On 7/27/2023 2:02 PM, Tom Brent wrote:
>
> Can anyone point me to information regarding when dedicated 
> _aeronautical_ non-directional beacons were established? An article in 
> the February 1935 issue of Aero Digest by Fred Lutz talks about the 
> Kruesi radio compass being
>
> “*/available for the/*/*first time for the use of air transport lines, 
> commercial operators and private pilots*/”
>
> and further, that it had been adopted by the US Army Air Corps. 
> However, it also states that it will work as long as there is a 
> broadcasting station within the sets range and I’m interpreting this 
> use of the term “broadcasting station” to mean a commercial radio 
> station operating in the AM broadcast band. The Kruesi receiver tunes 
> 150-1500 KHz.
>
> The establishment of low frequency radio range systems (A-N radio 
> ranges) is well documented online but it is the simple NDB that I’m 
> curious about. I’ll continue along my course of looking through old 
> aviation magazines but if anyone could steer me on the correct bearing 
> to find this information it would be appreciated.
>
> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for 
> Windows
>
>
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