Derek Armstrong

A look at Derby's Railway Technical Centre, which exists to apply science to the practical problems arising from a changing railway system which has its roots in the past.

Derek Armstrong’s 1975 Shell Film Unit instructional series on aerodynamics, explaining the relationship between lift and weight as the foundational forces that keep an aircraft flying. (Note: This is an update of the 1947 film series of the same name.)

A look at Derby's Railway Technical Centre, which exists to apply science to the practical problems arising from a changing railway system which has its roots in the past.

A look at Derby's Railway Technical Centre, which exists to apply science to the practical problems arising from a changing railway system which has its roots in the past.

Derek Armstrong’s 1975 Shell Film Unit instructional series on aerodynamics, explaining the relationship between lift and weight as the foundational forces that keep an aircraft flying. (Note: This is an update of the 1947 film series of the same name.)