| Year | 2019 |
| Date | 06-Dec |
| Volume | 223 |
| Issue | 4,627 |
| Page | 850 |
| Category | Locomotive |
| Part | 2 |
| Title | Walchaerts (Walschaerts?) Valve Gear for Sweet Pea |
| Author | Frank Birchall |
| Notes | Explains how he upgraded the Hackworth valve gear on his Metre Maid to Walschaerts. Radius rod, the combination lever, setting the Walchaerts (Walschaerts?) gear, testing |