| Year | 1939 |
| Date | 02-Feb |
| Volume | 80 |
| Issue | 1,969 |
| Page | 123 |
| Category | Petrol Engine Topics |
| Part | |
| Title | A Supercharged Flat Twin 15 c.c. Engine |
| Author | Edgar T.Westbury |
| Notes | By D.Innes of the Altrincham MPBC, crankcase supercharging, construction of engine, arrangement of rotary valve, plan view of engine, ignition, performance |