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
'Leitner-Watts' two-bladed metal airscrew with detachable and adjustable blades 'Leitner-Watts' two-bladed metal airscrew with detachable and adjustable blades