Keywords: Boeing NB-1 landplane in flight near NAS Pensacola.jpeg A U S Navy Boeing NB-1 BuNo A-6836 training airplane from Naval Air Station Pensacola Florida USA in flight The Boeing NB or Model 21 was a primary training aircraft developed for the United States Navy in 1924 http //collections naval aviation museum/emuwebdoncoms/pages/doncoms/AdvQuery php U S Navy National Museum of Naval Aviation photo No http //collections naval aviation museum/emuwebdoncoms/pages/doncoms/Display php irn 37628 QueryPage 2Femuwebdoncoms 2Fpages 2Fdoncoms 2FAdvQuery php 2011 003 023 002 s 1920 U S Navy PD-USGov-Military-Navy Boeing NB Naval Air Station Pensacola in the 1920s Aerial photographs of military aircraft in flight |