| Year | 2023 |
| Date | 02-Jun |
| Volume | 230 |
| Issue | 4,718 |
| Page | 740 |
| Category | Steam |
| Part | 1 |
| Title | Radial Valve Gears Again |
| Author | Duncan Webster |
| Notes | Sheds light on what is often seen as a complex subject. Introduction, terminology, outside admission slide valve, inside admission piston valve, valve movement, derivation of equations, crank geometry, port opening, lead and clearance volume, simple eccentric gear, the equivalent eccentrics |