| Year | 2004 |
| Date | 19-Mar |
| Volume | 192 |
| Issue | 4,217 |
| Page | 318 |
| Category | Internal Combustion |
| Part | 8 |
| Title | Bristol Hydra. The Next Twelve Months |
| Author | Brian Perkins |
| Notes | Triumphs and disasters. Cylinder head details, bandsaw operations on cylinder head blanks, fin slitting saw details |