| Year | 1977 |
| Date | 20-May |
| Volume | 143 |
| Issue | 3,561 |
| Page | 558 |
| Category | Competition |
| Part | |
| Title | The Hot Air Engine Competition, at the Wembley Model Engineer Exhibition |
| Author | Professor D.H.Chaddock |
| Notes | Mr. Clapham's winning engine, rhombic drive engine by Dr. Senft, double-acting engine by Mr. Wilkinson, rhombic drive engine by F.B.Thomas, external rhombic drive by Mr. Chellis, parallel motion engine by Mr. Rainer, horizontal engine by Mr. Broughton, Robinson engine by Mr. Mallett, wobble plate drive by Mr. Urwick, vertical Stirling by Mr. Pattinson, Unimat lathe engine by Mr. Churchill, promising engine by Mr. Collin, Alpha and Omega by Mr. Mason, engine by Mr. Piyasena |