| Year | 2004 |
| Date | 05-Mar |
| Volume | 192 |
| Issue | 4,216 |
| Page | 252 |
| Category | Exhibition |
| Part | |
| Title | Competition Models at The 73rd Model Engineer Exhibition. Class A1: Hot Air Engines |
| Author | Julian Wood |
| Notes | 'Gamma' type by Ian Cornish from a German kit, Herbert Stumm's Malone Stirling cycle engine |