| Year | 1997 |
| Date | 07-Nov |
| Volume | 179 |
| Issue | 4,054 |
| Page | 555 |
| Category | Steam |
| Part | 2 |
| Title | Radial Valve Gears Revisited |
| Author | Duncan Webster |
| Notes | A comprehensive mathematical analysis of Joy valve gear. Introduction, principle of operation, a red herring, design methodology, worked example |