The Boy Scouts of the Air on Lost Island (Paperback)

They made short work of the trip to the long, low shed Phil and Jerry had seen on their exploration of the island, and which they now learned was a "hangar," a place specially fitted for taking care of the aeroplane. When the big sliding door was thrown open the boys saw that inside was a complete machine shop, with lathes, benches, drills and punches, the whole being operated by power from the gasoline engine in the corner.