A museum quality hand-built engineer's 1:4 scale model of a 1917 Bentley BR2 Rotary Engine, this precision engineered model has been manufactured and constructed in its entirety by a retired aircraft engineer over a period of nearly three years. Apart from the nuts and bolts every metal piece has been scratch-built, using the drawings in the book L.K. Blackmore: Bentley BR2 building the one quarter scale working replica, mounted on a display stand, on a wooden base with a Perspex cover. This model was built as an exhibition piece and has not been run and would require modification to be a working model.