Radioplane BTT
| BTT | |
|---|---|
|   Radioplane Shelduck on display at the Bournemouth Aviation Museum  | |
| General information | |
| Type | Target drone | 
| National origin | United States | 
| Manufacturer | Radioplane, Northrop | 
| Number built | >73,000 | 
The Radioplane BTT, known as RP-71 by the company, as WS-426/2 by the United States Navy, and as WS-462/2 by the US Air Force, is a family of target drones produced by the Radioplane Company (later a division of Northrop).