| Year | 1941 |
| Date | 01-May |
| Volume | 84 |
| Issue | 2,086 |
| Page | 354 |
| Category | Improving the Two-Stroke |
| Part | |
| Title | "Valves for the Valveless |
| Author | Edgar T.Westbury |
| Notes | A discussion of equipping two-stroke engine with valve-gearing. A section of the Harland & Wolff (Burmeister & Wain System) oil engine charged by a Roots blower, overhead transfer poppet valve, inlet and transfer valves operated from a single cam, poppet valves, section of an early Gray marine engine, automatic poppet valves, piston valves, automatic transfer valve in the piston head, sleeve valves |