Northrop A-17
The Northrop A-17 , a development of the Northrop Gamma 2F model , was a two-seat , single-engine , monoplane , attack bomber built in 1935 by the Northrop Corporation for the U . S . Army Air Corps . 
<triplet> Northrop A-17 <subj> Northrop Gamma <obj> subclass of <subj> Northrop Corporation <obj> manufacturer <triplet> Northrop Gamma <subj> monoplane <obj> subclass of