The Plane Model is treasure that can be obtained in the episode In the Air Tonight in Sly Cooper: Age of Thieves. It is worth 189 coins and the time needed to reach the safehouse is twenty-three seconds.
"This plane model is a model of the infamous Fiery Duke plane, the same one that Otto van Cooper shot down two years ago. Otto gained fame for his victory over the wicked pilot, and took the plane's model as a reward from the townspeople. Gustav had stolen it recently, but it's now in good hands."
It is located in Otto van Cooper's ruined repair shop. Otto van Cooper is the only character who can get this treasure.