Sky Giant (1938)

Given the job of training young pilots for important postwar cargo flights hardboiled Col Stockton forces exofficer Stag Cahill back into the military to be his aide at the academy Complications arise when Stocktons son Kenneth arrives for training and Stockton believing his son to be a slackard looks for an excuse to drop him from the program Rivalry develops between Stag and Ken as well as they fall for the same girl