Vintage steam engine

Nene Valley Railways, steam engine

This is outside the engine sheds of  Nene Valley Railways. Engines are quite complicated to draw, which I solve by simplifying the shapes, as I am not interested in technical detail. 

Looking at the subject through half closed eyes is a good way to cut out detail when judging overall shapes and tone. 

I suppose this painting is about shadow and light and how to make greys colourful. Most of them I mixed from varying proportions of alizarin crimson (Winsor & Newton), raw sienna (Jacksons) and turquoise blue (Turner).