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Which statement about weight estimation classes is INCORRECT?

  • A.Class III uses historical fractions
  • B.Class I uses aircraft-level fractions
  • C.Class II uses group statistical formulae
  • D.Fidelity rises through the classes

Answer: A

Correct answer: Class III uses historical fractions

Class III is the class that stops using history. It analyses the actual defined parts - their geometry, material and joints - which is why it is the most accurate and the most expensive of the three. The other three statements are all correct: Class I works at aircraft level, Class II uses group statistical formulae, and fidelity rises through the classes.

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