| Year | 2007 |
| Date | 11-May |
| Volume | 198 |
| Issue | 4,299 |
| Page | 561 |
| Category | Hot Air |
| Part | 1 |
| Title | The Davide Mk.II Stirling Engine |
| Author | James G.Rizzo (Malta) |
| Notes | Describes a new design, tribute to David Urwick. The Davide Mk.II double power cylinder Stirling engine, David Urwick's 8-cylinder Siemen's drive engine, schematic drawing of Ubique, back view of Davide Mk.II engine, design and profile, construction |