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Refer to figure.
What type of drag is depicted by line number (1) in the attached figure?

  • A

    Induced drag

  • B

    Total drag

  • C

    Minimum drag

  • D

    Parasite drag

Refer to figure.
In level flight, at a specific weight and configuration, the change in total drag with indicated airspeed (IAS) for an aircraft is composed of both induced and parasite drag. The combined effect of these two types of drag is referred to as total drag.

At low speeds, induced drag tends to dominate, while parasite drag becomes more significant at higher speeds. Due to the distinct characteristics of how parasite and induced drag change with speed, there exists a particular speed at which total drag is minimized. This speed is known as the Velocity Minimum Drag (VMD) and occurs when the magnitudes of induced and parasite drag are equal.

In this figure:

  • Line 1: Total Drag
  • Line 2: Parasite Drag
  • Line 3: Induced Drag

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