The Lakeport boys come into an old aviator's biplane, learn to fly it and find rivals who prefer sabotage to engineering. Stratemeyer's Lakeport series moved the same set of boys through motoring, baseball, rowing and finally flight, following whatever was new. The aviation detail is of 1912 and the mystery is worked out fairly, which the series did not always bother to do.
Engels
The Rover Boys in Business : or, The Search for the Missing Bonds
Under Dewey at Manila : or, The War Fortunes of a Castaway
The Rover Boys on the Farm : or, Last Days at Putnam Hall
Lost in the Land of Ice : or, Daring Adventures Around the South Pole
Garry Grayson at Lenox High : The champions of the football league
Tour of the Zero Club : or, Adventures amid ice and snow
The young naval captain : The war of all nations
THE ROVER BOYS Boxed Set: 26 Illustrated Adventure Novels
The Rover Boys at Big Bear Lake; or, The Camps of the Rival Cadets : An American Schoolboy Adventure of Cadet Rivalry, Wilderness Camps, and Courage
Don Sturdy on the Ocean Bottom or The Strange Cruise of the Phantom : A Classic Undersea Adventure of Submarines, Salvage, and Scientific Daring
THE ROVER BOYS Boxed Set : Enriched edition. Thrilling Adventures of Three Brothers in Action-Packed Tales