| Year | 1974 |
| Date | 01-Nov |
| Volume | 140 |
| Issue | 3,500 |
| Page | 1,048 |
| Category | Road Locomotive |
| Part | 24 |
| Title | Building the Allchin Traction Engine to 1 1/2 in. scale |
| Author | W.J.Hughes |
| Notes | Machining the valve face, the regulator cavity, the valve chest, fixing the valve chest |