Curtiss XB-2 Condor bomber under construction, closeup of front end, showing framework of fuselage and lower wing center section, as well as exposed Curtiss V-1570-7 Conqueror liquid-cooled V-12 engines.
USAF
1927-06-16
U.S. Air Force photo <a rel="nofollow" class="external autonumber" href="https://media.defense.gov/2006/May/11/2000557418/-1/-1/0/060420-F-1234P-054.JPG">[1]</a> from the <a rel="nofollow" class="external text" href="http://www.nationalmuseum.af.mil/Upcoming/Photos/igphoto/2000557418/">image gallery</a> on the website of the National Museum of the United States Air Force.