Cherry Hill with her scale model of the 1931 Aveling & Porter road roller, which she built between 1966 and 1969 Cherry Hill, who has died aged 93, was one of the world’s foremost scale model ...

It can make up to five horsepower. Scale-model engines are a great way to play with the mechanics without needing a lot of space. They allow for tinkering and tuning, and a new video shows how a ...