| Year | 1967 |
| Date | 07-Jul |
| Volume | 133 |
| Issue | 3,324 |
| Page | 653 |
| Category | Locomotive |
| Part | |
| Title | Model Locomotive Design |
| Author | J.Ewins |
| Notes | Cylinder size, ports and passages. Comparative tests, ports and passages, obtaining efficiency, other factors, scale effects |