| Year | 1939 |
| Date | 25-May |
| Volume | 80 |
| Issue | 1,985 |
| Page | 624 |
| Category | Queries and Replies |
| Part | |
| Title | 7682. Fixing Strakes to Model Traction Engine Wheels |
| Author | A.W.P. |
| Notes | A McLaren traction engine showing "spud" plates attached to driving wheels (photo by W.J.Barker) |