| Year | 1951 |
| Date | 31-May |
| Volume | 104 |
| Issue | 2,610 |
| Page | 698 |
| Category | Nautical |
| Part | |
| Title | A Propeller Testing Tank. As Used by the North London Society of Model Engineers |
| Author | L.V.Raxworthy |
| Notes | The author demonstrating the tank, how it works, to stop splashing, vertical centre-line section, back view of tank showing motor and resistance bank, manometer scale |