| Year | 1981 |
| Date | 01-May |
| Volume | 147 |
| Issue | 3,656 |
| Page | 570 |
| Category | Exhibition |
| Part | |
| Title | 50th Model Engineer Exhibition 1981. Competition Results. The A.N.Clark Hot Air Engine Competition |
| Author | D.H.Chaddock |
| Notes | Mr Robbins' Ergo 2 marine "Rider" engine, Mr Collins' Whippet, Mr Mallett's "Bailey" |