"The Aeroplane Boys on the Wing; Or, Aeroplane Chums in the Tropics" by John Luther Langworthy is a young adult fiction novel written in the early 20th century. This adventure story follows the exploits of two young aviators, Frank Bird and his cousin Andy, as they navigate the challenges of their rivalry with a bully named Puss Carberry, all while striving for adventure in the tropics and maintaining their beloved aeroplane. At the start of the book, Frank and Andy return from a baseball game on a launch, where tensions rise between Frank and Puss, who has a longstanding grudge against him. The confrontation escalates when a scuffle leads to Puss accidentally falling overboard, prompting Frank to heroically dive in to save him, despite Puss's initial antagonism. This incident sets the stage for their ongoing rivalry, as Frank continues to show decency towards Puss, who ultimately reacts ingratitude. The opening chapters explore themes of friendship, competition, and the spirit of adventure, while hinting at greater escapades ahead as the boys plan a trip to South America to seek out Andy's missing father. (This is an automatically generated summary.)