| Year | 1968 |
| Date | 05-Jul |
| Volume | 134 |
| Issue | 3,348 |
| Page | 633 |
| Category | Internal Combustion |
| Part | 5 |
| Title | Model Petrol Engines |
| Author | Edgar T.Westbury |
| Notes | Further notes. Piston head transfer valve, crankshaft design, Busy Bee engine, Bumble Bee, bearings, Ensign 10 cc engine |