Thought to be unique opportunity, this unflown Dowty R391 test blade, introduced for the Lockheed Martin C-130J Hercules transport in 1996. The swept-back blades are made of composite materials, mainly carbon and glass fibre with polyurethane foam filling. 
Used for pre-production electrical and stress testing, it was donated to the Jet Age Museum and has been restored, prepared and lacquered by Aerotiques for sale to raise funds for this all-volunteer, registered charity.  It is mounted on a stainless steel base and measures approximately 1.9m tall.