While the team found evidence of trials of photoelastic lacquers for stress tests , it proved impossible to interview any of the laboratory staff to learn more . ( Fedden considered the '' LFA '' Engine Department lacking in modern equipment , but the '' LFA '' complex possessed a better altitude test bed installation than any in Britain ; a better example still would be seen at BMW 's Munich facility . ) The turbojet engine research artifacts found included examples of turbine and stator blade forms , blade cooling , blade construction ( including hollow and ceramic types ) , piston cooling , and other matters . While at Völkenrode , the Americans stole equipment from under the noses of the British ( including an interferometer ) , only to have the thefts denied when confronted by Britain at Potsdam . The Fedden Mission spent two days at Völkenrode , its sub-team returning ten days later
Potsdam
Potsdam Conference
Fedden Mission