| Year | 1911 |
| Date | 27-Jul |
| Volume | 25 |
| Issue | 535 |
| Page | 80 |
| Category | Aeronautical |
| Part | |
| Title | Machine for Testing the Thrust of Screw Propellers for Model Aeroplanes |
| Author | C.T.Pollit |
| Notes | Diagram for finding pitch of screw propellers, machine for testing the thrust, diagram showing safe turns given to elastic |