| Year | 1933 |
| Date | 09-Nov |
| Volume | 69 |
| Issue | 1,696 |
| Page | 453 |
| Category | Model Marine Notes |
| Part | |
| Title | In the Wake of the Power Boats |
| Author | The Spectator |
| Notes | Crankshaft for the "Grayspec", about flash boilers, sketch showing method of ensuring complete combustion |