From my personal collection of old air charts: There is no date on this chart that I can find, but Hensley Field is still an Army field on this chart. By WW-2 it had become known as "Navy Dallas". I believe this chart is no later than 1942.
This is on ordinary 8.5 X 11 " paper, and the printing is just as you see it. (Back then those old guys not only had to have good hearing to tell the difference between a ._ and _. ( Morse-code A or N)...they also had to be able to read the small print the gov't made these charts with.
It helps to zoom in using the Adobe PDF (+) key...but it seems like cheating.
I'd hate to have had to fly this approach at night with sorry cockpit lighting, bouncing airplane, while trying to listen for an "A" or a HUM or an "N" ...in-between the round-engines, cockpit wind-noise, crackling and popping of Lightning and background-Static of AM radios.
(Note that Love Field Tower is on freq. 278 KC while the radio-range approach is on 341KC...and that was on an analog-tuned receiver!)
Dallas Radio Range.pdf
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'53 B-model N146YS SN:25713
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention. An originality nut (mostly) for the right reasons.
Working at SimuFlite, despite being gray-headed.... I was one of the younger guys. I got it from a very ancient Braniff retiree named Dick Peavy. He informed me that the approach has "Confidential" on it because in the early days Airlines were very guarded about the competition getting their hands on such valuable resources. (I guess it had yet to occur to them it might reduce the number of scud-runners.)
Sharp eyes Ron. I don't know that is a valid date or not. It is pretty tiny and seems to say " 42 12". I know that Helmsley Army was renamed in 1943 to "Navy", according to the website "Abandoned Airfields".
'53 B-model N146YS SN:25713
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention. An originality nut (mostly) for the right reasons.
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I got it from a very ancient Braniff retiree named Dick Peavy. He informed me that the approach has "Confidential" on it because in the early days Airlines were very guarded about the competition getting their hands on such valuable resources. (I guess it had yet to occur to them it might reduce the number of scud-runners.)