| Year | 1944 |
| Date | 21-Sep |
| Volume | 91 |
| Issue | 2,263 |
| Page | 281 |
| Category | Internal Combustion |
| Part | |
| Title | Experiments in Four-stroke Engine Design. A review of several years' efforts to improve the breed of model petrol engines for speed-boat propulsion and other purposes |
| Author | Edgar T.Westbury |
| Notes | General arrangement of "Apex Minor" 15 c.c. engine, crankcase and end cover, camshaft bearing housing, crankshaft, an "Apex Minor" by H.Hayhurst, cylinder, an apology |