POF - Range and Endurance

Define SAR:

• The amount of time flown per unit quantity of fuel

• Is IAS/GFC

• Is the ground distance flown per unit quantity of fuel

• Is the air distance flown per unit quantity of fuel

Specific fuel consumption is:

• The gross fuel consumption per unit of power produced

• The specific fuel consumption per unit of power produced

• The gross fuel consumption per unit of work done

• The gross fuel consumption x TAS

The best conditions for maximum SAR are:

• Lowest weight

• Flying at minimum drag speed

• Increased altitude (Only effects best IAS)

• Decreased altitude (Only effects best IAS)

Altitude has no effect on SAR

• True. But it does effect specific ground range

• False. Increasing altitude will increase SAR

In a practical sense is it recommended to fly at the minimum drag speed?

• Yes as this will maximise SAR

• No as minimum drag speed is considered an unstable speed

• Yes as the aircraft can travel faster

• Yes as it will save money

Select the options that will give the lowest SFC and achieve best range

• Minimum RPM

• Carb heat off

• Maximum RPM

• Aircraft properly leaned

• High MAP, Low RPM

What is the difference between flying for range and flying for endurance?

• There is no difference they are the same thing

• When flying for endurance it is not important how much distance is covered

• One requires maximum speed the other requires minimum speed

• Range is concerned with TAS and endurance is concerned with IAS

Define flying for endurance:

• Flying for the greatest amount of time for the most fuel used

• Flying for the greatest distance in the shortest amount of time

• Flying for the greatest distance in the longest amount of time

• Flying for the greatest amount of time for the least fuel used

How does altitude effect endurance?

• For a given IAS increasing altitude will increase TAS. This will increase endurance

• For a given IAS increasing altitude will increase TAS. This will decrease endurance

• For a given IAS increasing altitude will reduce TAS. This will increase endurance

• For a given IAS increasing altitude will reduce TAS. This will decrease endurance

Increasing weight will:

• Increase endurance due to the increase in potential energy for a given altitude

• Decrease endurance by decreasing drag

• Decrease endurance due to the increased minimum speed

• Not effect endurance