Many aspects of this episode were reused for the TaleSpin episode From Here to Machinery, in which an inventor builds a robot called the Auto Aviator which can fly planes.
After Scrooge wakes up in the middle of the night to find Armstrong emptying his money bin, Armstrong is at the bottom of the money bin with only a few money bags left to move. Where has the money gone, and does Scrooge retrieve it? It is never mentioned in the episode.
Scrooge: He's in his stupid old biplane. Launchpad there's no place to land that thing here.
Launchpad: Doesn't matter Mr. McD ... (plane sputters) ... I'm out of gas anyway.