| Year | 1925 |
| Date | 19-Nov |
| Volume | 53 |
| Issue | 1,282 |
| Page | 649 |
| Category | Internal Combustion |
| Part | |
| Title | Notes on the Three-Port Two-Stroke Petrol Engine |
| Author | H.J.G. |
| Notes | Sectional elevation of typical air-cooled two-stroke engine, form and contour of deflector head, general design, double exhaust port lay-out, details of design, burnt in piston rings, mechanical details |