| Year | 1941 |
| Date | 25-Sep |
| Volume | 85 |
| Issue | 2,107 |
| Page | 245 |
| Category | Locomotive |
| Part | |
| Title | 1831. A 3 1/2in. Gauge I.C. Engine-driven Locomotive |
| Author | Edgar T.Westbury |
| Notes | A simple cam-turning jig, relative positions of the four cams when crank is at top dead centre, machining the cam flanks, forming the base circle, nose contour, hardening the cams, timing gears, spur wheel, pinions |