Section of composite rotor blade from Lynx helicopter, 1985 Section of composite rotor blade from Lynx helicopter
Pair of patent Resilient cycle fork blades, in high manganese steel Pair of patent Resilient cycle fork blades 1934
Five specimens showing the stages in the manufacture of the blade of the Kent Felling Axe Five specimens showing the stages in the manufacture of the blade of the Kent Felling Axe 1922