| Year | 1938 |
| Date | 01-Dec |
| Volume | 79 |
| Issue | 1,960 |
| Page | 529 |
| Category | Petrol Engine Topics |
| Part | |
| Title | Modern Developments in Engine Design. (With Special Reference to Rotary-Valve Engines) |
| Author | Edgar T.Westbury |
| Notes | Cross section through Darracq rotary-valve four-cylinder engine, a section of the Cross rotary-valve,improvements in valve operation, A.E.Kerswell's 30 cc. engine,types of rotary valve, L.Bratley's boat Magic Midget with an Aspin rotary-valve |