| Year | 1930 |
| Date | 20-Feb |
| Volume | 62 |
| Issue | 1,502 |
| Page | 187 |
| Category | Model Aeronautics |
| Part | |
| Title | Model Aeroplane Propellers |
| Author | W.E.Evans |
| Notes | Two, three, or four-bladed propellers? Propeller pitches, Chauviere type propellers, finding theoretical pitch of propellers, angle template, apparatus used for measuring pitch of propellers |