| Year | 1957 |
| Date | 18-Jul |
| Volume | 117 |
| Issue | 2,930 |
| Page | 73 |
| Category | Internal Combustion |
| Part | |
| Title | A 60 c.c. Horizontal Gas Engine (Centaur) |
| Author | Edgar T.Westbury |
| Notes | Artist's impression, general design, general arrangement, engine speeds, wet liner cylinder, visual lubricators |