M Paul Lloyd wrote:Something operation 'paperclip' missed we must presume.

No not at all. Paperclip recruited Dr Kurt Debus a particularly nasty SS officer and electrical engineer who worked on the Bell project. He eventually worked for NASA on Saturn V launches for the Apollo Missions.
Because Debus denounced collegue and AEG electrical engineer Richard Cremer to the Gestapo, one of Cremer's friends, a senior scientist in the Nazi nuclear program Carl Ramsaur wrote a letter to the Gestapo seeking Cremer's release which survives in the Berlin Document Centre referencing the Bell project. Ramsauer talked of Projekt SS/1040 (also codenamed Charite Anlage by the SS Armaments Research Office or FEP) and how critical the project was to germany winning the war. Indeed Ramsaur suggested Cremer was uniquely vital as the only expert in his field.
http://en.wikipedia.org/wiki/Carl_RamsauerOthers scientists or engineers involved were:
Carl Ramsaur
Walther Gerlach
Ronald Richter (exile in Argentina)
Otto Cerny (recruited by Paperclip)
Elisabeth Adler
Otto Ambros
Herman Oberth (recruited by Paperclip)
If you understand what the respective expertise of these individuals are then you can interpret what the actual project was for. Gerlach and Adler for example famously worked on the spin polarisation of atoms in 1925. Richter recreated the Nazi Bell project in Argentina for Peron from 1948-1952.
Originally the project was under the control of Heereswaffenamt as Projekt Thor, led by Gerlach whose role was procurement of enriched Uranium for the German A-bomb. Following the failed assasination attempt against Hitler on 20 July 1944 the SS took control of all nuclear projects on 22 July and at that point the project became Projekt SS/1040 Charite Anlage.
The Nazi Bell was nothing to do with UFOs, or anti-gravity except in the imaginations of impressionable people. It was however the most top secret arm of nazi nuclear research and as a result of secrecy or ignorance, many people have filled in the blanks with their imaginations.
Whilst the project has been embellished by flights of fancy there was a very real project and about 45,000 prisoners of Gross Rosen Concentration camp gave their lives for the Nazi Bell project. The 66 scientists executed were in fact mainly captured Soviet engineers and scientists indentured to work on the Bell.