1951 airplane spotters guide, USAF

Leifer

Senior Member
Here is a recent eBay purchase of mine, showing contrails from a 1951 USAF book/pamphlet.
It describes using "vapor trails" (contrails) as a means to help determine aircraft type.

(I have two videos back-to-back, one with reading the text, one without reading text.)

 
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Leifer

Senior Member
1951013.jpg

1951012.jpg

1951016.jpg

1951015.jpg

1951017.jpg

1951014.jpg

regarding pic #5....it's likely this is not from one photograph, and is perhaps a montage of 3 photographs , melded together......in order to gather an overall idea. That is my hunch.
 
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