pre 1995 archive

  1. Leifer

    1951 airplane spotters guide, USAF

    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.)