| Year | 1941 |
| Date | 23-Oct |
| Volume | 85 |
| Issue | 2,111 |
| Page | 323 |
| Category | Internal Combustion |
| Part | |
| Title | The Oil Engine as a Model |
| Author | B.C.J. |
| Notes | Difficulties encountered, possible solutions. A modified form of the "hot-air" system as applied to a model vertical Petter oil engine, conclusions |