| Year | 1979 |
| Date | 04-May |
| Volume | 145 |
| Issue | 3,608 |
| Page | 498 |
| Category | Exhibition |
| Part | |
| Title | 48th Model Engineer Exhibition 1979. The Hot Air Engine Competition |
| Author | Prof. D.H.Chaddock |
| Notes | F.Brian Thomas' twin cylinder horizontally-opposed rhombic drive engine, T.H.Mallett's Denney Ericsson pumping engine, Phoelix, 12-cylinder 6 moving regenerator engine by D.Urwick |