| Year | 2019 |
| Date | 01-Mar |
| Volume | 222 |
| Issue | 4,607 |
| Page | 361 |
| Category | Aeronautical |
| Part | 10 |
| Title | Quarter Scale Bentley BR2 Rotary Aero Engine |
| Author | Mick Knights |
| Notes | Makes the slip ring for the ignition and then revisits the cylinder heads. The Tufnol slip ring, another look at the cylinder heads |