| Year | 1924 |
| Date | 21-Feb |
| Volume | 50 |
| Issue | 1,191 |
| Page | 203 |
| Category | Model Marine Notes |
| Part | |
| Title | Horizontal Twin-Screw Engine |
| Author | G.D.Noble |
| Notes | Back view showing gears and exhaust pipe, part sectional elevation and plan, water pump, valves and operating gear, plan view (on page 206) |