| Year | 1940 |
| Date | 07-Mar |
| Volume | 82 |
| Issue | 2,026 |
| Page | 240 |
| Category | Aeronautical |
| Part | |
| Title | Aeronautical Engineering |
| Author | A.J.T.Eyles |
| Notes | Forming double curvature metal sections for model aircraft. Round-nosed mallet, hollowing hammer, leather sandbag, wooden hollowing block, smoothing a double curvature section, metal disc spinning, spinning a cowl |