| Year | 1943 |
| Date | 06-May |
| Volume | 88 |
| Issue | 2,191 |
| Page | 414 |
| Category | Improving the Two-Stroke |
| Part | |
| Title | Possibilities of Dual Ignition |
| Author | Edgar T.Westbury |
| Notes | Research work, advantages, "turbulence", plan view of Ding Hao, opinions from America, Parker H.Kemble's 10 c.c. speed boat Ding Hao |