Megan
The definitive account of the design and construction of this aircraft (up to the end of the war) is in the second volume (pp 389-411) of Peter Amos' in-depth study of Miles Aircraft "
Miles Aircraft: The Wartime Years 1939 - 1945 published by Air-Britain (Historians) Ltd. in 2012
www.air-britain.co.uk
The post-war cancellation of the project will be detailed in the third volume of the series, due for publication later this year.
Peter has been assiduous in assembling every shred of evidence, from the National Archives, the project's aerodynamicist (recently died), papers from George Miles' archives, from the USA and from Eric Brown.
By no means all the issues of interest have been solved to explain the design of this extraordinary aircraft. But what is clear is that the technical problems faced by Miles were enormous, and are much more interesting than the relationship with the X1. An excellent account by Brian Brinkworth in the Aeronautical Journal in March 2010 puts the project into its historical perspective.