Helicopter Cold Weather Flying Quiz


Note: This quiz was previously published in the last issue of Aviation Safety Vortex, with a promise to publish the answers in the "next" issue. Given there was no next Vortex, and the significant time lapse between then and now, we felt it was appropriate to repeat the quiz, in addition to providing the answers. Answers can be found after the answers from the self-paced study guide in this issue. - Ed.

1. The last autorotation RPM adjustment was done on my helicopter in August. Now that the weather is colder, I can expect the RPM to _____________ for the same flight conditions.

  1. increase
  2. remain about the same
  3. decrease

2. The electrolyte in a lead-acid battery will freeze at _____________ temperature if the battery is discharged.

  1. a warmer
  2. a colder
  3. the same

3. ATC issues an IFR clearance that would put your flight in a non ice-protected helicopter at an altitude above the freezing level, and in cloud. You should:

  1. Accept the clearance, as ATC probably has more current information than you.
  2. Refuse the clearance and inform ATC as to why.
  3. Accept the clearance and request the change once you've reached the assigned altitude.

4. Ice adhering to rotor blades will degrade their aerodynamic efficiency, requiring an increase in power to produce an equivalent amount of lift. During autorotation, this will result in a higher-than-normal rate of descent and it may not be possible to maintain safe rotor RPM during the descent and flare. The main reason for the loss of autorotation RPM is:

  1. The ice forming on the blade will decrease your forward speed.
  2. The ice will be first forming on the outboard section of the blade. Since this is the autorotative zone, the effect will be devastating if you enter autorotation.
  3. The ice will be first forming on the inboard section of the blade. Since this is the autorotative zone, the effect will be devastating if you enter autorotation.
  4. The ice will be first forming on the tail rotor, reducing the amount of thrust, requiring you to add more left pedal.

5. Graphic area forecasts (GFA) are always issued in pairs and for the same validity period. One is called the Clouds & Weather, the other one is called:

  1. GFAN33 CWUL
  2. Turbulence, Icing & Freezing level
  3. Icing in clouds & Mechanical turbulence

6. What is the procedure for flight into icing conditions, if your aircraft is not certified to fly into icing conditions?

  1. Nothing until the windshield gets all covered.
  2. Turn-on the heater, the pitot heat and the anti-ice.
  3. Leave the area immediately or land as soon as possible and turn on the heater, the pitot heat and the anti-ice.
  4. Call ATC and ask for a higher altitude.

7. What are the main indications of ice forming on the main rotor during flight?

  1. Ice forming on the windshield.
  2. An increase of torque and possible vibrations.
  3. Ice forming on the tail rotor.
  4. An increase of airspeed and possible vibrations.

8. What do the abbreviations ICGIC and ICGIP stand for?

  1. Ice Clear Generally In Cloud and Icing In Precipitation.
  2. Icing In Cumulus and Icing Probability.
  3. Icing In Cloud and Icing In Prescott.
  4. Icing in Cloud and Icing in Precipitation.
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