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Statement I: Installed thrust is lower than bare engine test bed thrust.

Statement II: Intake spillage, nacelle drag and airframe offtakes all take their share.

In the light of the above statements, choose the correct answer.

  • A.Statement I is incorrect but Statement II is correct
  • B.Both Statement I and Statement II are correct
  • C.Both Statement I and Statement II are incorrect
  • D.Statement I is correct but Statement II is incorrect

Answer: B

Both are true and the second is the reason. Performance guarantees account for the difference explicitly, since an engine that meets its figures on a test bed may not deliver them once wrapped in a nacelle and supplying an aircraft.

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