Has anybody seen or had a go at making the oscillating paddle engine in K.N.Harris's book; Model Stationary and Marine Steam Engines? Getting all the flat surfaces truly flat and parallel looks formidable, as does cutting the steam ports accurately. I think I saw one once many years ago. it was a bit battered, painted pale green, very chipped, and had no paddle wheels. It was a short distance from me and I didn't recognise it for what (I think) it was. I would very much like to know how well one of on these engines might perform.
Maurice