| Year | 1943 |
| Date | 21-Oct |
| Volume | 89 |
| Issue | 2,215 |
| Page | 399 |
| Category | Internal Combustion |
| Part | |
| Title | A 15-c.c. Aspin Rotary Valve Engine with Magneto Ignition |
| Author | F.W.Waterton |
| Notes | Power plant for his model speed boat, sectional elevation, cross section of oil pump, timing and valve diagram |