In my seemingly neverending and so far unsuccessful quest for documentation of Westland's 1940s experimentation with the Delanne tandem wing configuration, I recently wrote to the UK RAeS National Aerospace Library, which includes both the RAE Technical Reports and some original Westland documents among their collections. I'm going to give it a week or two to see if they respond via the public e-mail address, but if not, does anyone have a specific contact within the NAL that might be able to help? Thanks and regards, Matthew
