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Old 7th Dec 2018, 11:58
  #12547 (permalink)  
Join Date: Jun 2011
Location: alton
Age: 67
Posts: 18
Lancaster's suffered from fin failure, the structure was sufficiently strong for normal use but when corkscrewing was introduced as a way of avoiding night fighters fins started to fail due to the forces from side slipping, strengthening mods were introduced. Perhaps the trials were to try and replicate the loads. All Lancaster's were either built to the later standard or so modified by mid 1943.

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