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Discussion

Geometric, kinematic and dynamic similarity together require that model and full scale share

  • A.Shape, flow pattern and force ratios
  • B.Only the same overall size
  • C.Only the same surface material
  • D.Only the same test speed

Answer: A

Geometric similarity fixes the shape, kinematic similarity follows from it if the flow patterns correspond, and dynamic similarity demands that the governing dimensionless force ratios match. In aerodynamics those ratios are principally the Reynolds and Mach numbers.

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