| Year | 2019 |
| Date | 26-Apr |
| Volume | 222 |
| Issue | 4,611 |
| Page | 658 |
| Category | Stationary Engine |
| Part | 2 |
| Title | The Mackworth Six Cylinder Rotary Engine |
| Author | Kevin Barry |
| Notes | Presents a compact stationary rotary engine. The hub, the connecting rods, the pistons, the rear bearing carrier, the valve rotor, the valve stator, the mounting frame |