| Year | 1951 |
| Date | 29-Mar |
| Volume | 104 |
| Issue | 2,601 |
| Page | 413 |
| Category | Petrol Engine Topics |
| Part | |
| Title | A 50-c.c. Auxiliary Engine ("Busy Bee") |
| Author | Edgar T.Westbury |
| Notes | Why an "auxiliary engine"? Mounted on cycle and driving rear wheel by means of a friction roller, side view, section on centre-line of cylinder |