| Year | 1970 |
| Date | 16-Jan |
| Volume | 136 |
| Issue | 3,385 |
| Page | 90 |
| Category | Internal Combustion |
| Part | |
| Title | Building the "Otter". A 15 c.c. four-stroke petrol engine with overhead valves |
| Author | L.V.R.Haydock |
| Notes | Preparation of castings, machining order, crankcase, boring and facing crankshaft for liner, machining engine mounting bearers, machining cylinder block, machining cylinder head, machining the rear end cover |