| Year | 1931 |
| Date | 25-Jun |
| Volume | 64 |
| Issue | 1,572 |
| Page | 618 |
| Category | Model Aeronautics |
| Part | |
| Title | The "Heron" Low-Wing Monoplane |
| Author | Juste van Hattum |
| Notes | Control surfaces, the tail fairing, just off! On test at Wimbledon, the gears,layout of the gearing unit, the propeller, design of |