| Year | 1941 |
| Date | 10-Jul |
| Volume | 85 |
| Issue | 2,096 |
| Page | 37 |
| Category | Improving the Two-Stroke |
| Part | |
| Title | "Two Pistons per Cylinder" |
| Author | Edgar T.Westbury |
| Notes | Opposed-piston and double-barrrelled engines. Diagram of Sturgeon's double-piston two-stroke engine (1885), a modern Junkers opposed-piston engine, single combustion chamber engine on the Gearless car, the Trojan engine, application to model engines |