| Year | 2005 |
| Date | 30-Sep |
| Volume | 195 |
| Issue | 4,257 |
| Page | 372 |
| Category | Hot Air |
| Part | 1 |
| Title | Rhombic Hot Air Engine |
| Author | Les Kerr (Australia) |
| Notes | Describes a hot air engine with rhombic drive. Power cylinder, piston, rhombic connecting links, cylinder mounting bus, spacer washers, piston link, piston sleeve |