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What needs to observed regarding ice formation during the flight?

  • A

    An increase in mass and drag and a significant lift reduction.

  • B

    An increase in both drag and lift coefficient due to a mass increase.

  • C

    An increase in mass and a decrease in drag.

  • D

    An increase in mass and a reduced rate of descent.

Contaminated rotor blades (by ice, snow or dust) can also have significant issues on helicopter’s performance:

  • The All Up Mass increases, thus increasing the power required.
  • The shape of the rotor blade section is distorted, reducing its aerodynamic efficiency (by decreasing the lift production and increasing the drag), thus reducing the power available.

Both effects, decrease the power margin between the Power available and Power required and as a result the Performance.

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