Transcribed from press release attached to back of photo: "NEW-DESIGN PHOTO PLANE COMPLETED CULVER CITY, Calif., July 7 -- test-flown today for the first time, the new XF-11 was revealed as one of the world's fastest long-range photographic planes. It was designed and built by Howard Hughes in conjunction with the Air Materiel command engineers. Army officials said that it can attain a speed of more than 400 miles per hour and a ceiling of more than 40,000 feet. The plane has a pressurized cabin making it unnecessary for the crew to use oxygen masks. Outstanding features include a full-span flap, unique eight-camera layout and exceptionally fast take-off." Transcribed from photo sleeve: "Howard Hughes sits in the cockpit of the XF-11, a reconnaissance plane that Hughes built and designed in conjunction with Air Materiel Command engineers. Hughes is preparing for his first test flight in Culver City, California July 7, 1947."
Transcribed from attached press release: "DRILLING LABORATORY The fundamental purpose of all Hughes rock bit research is to improve bit performance. In attaining this improvement it is necessary to balance design with the application of correct metallurgical materials and manufacturing methods. The preliminary proving ground is the Drilling laboratory housed in the main Laboratory building. Its field-size drilling rig, with 118 ft. derrick, was especially designed to test rock bits in a manner simulating oilfield drilling conditions."