RMIT飞行训练课件－Range and Endurance Mass Brief 航程和续航时间讲解

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Range and Endurance
Mass Brief
Aim
• To Learn the principles of range and
endurance of an aircraft in flight, and the
factors that effect these conditions
Application
• In long distance flying the maximum
Range is important
• When holding the maximum Endurance or
time in the air is important
Overview
• Revision
– Thrust and Power
• Definitions
• Principles
– Range and Endurance
• Considerations
• Airmanship
Revision
• Thrust
• Power
IAS
Thrust
Power
IAS
Definitions
• Range
– Air distance travelled for a given fuel burn-off (distance)
• Endurance
– Time in flight for a given amount of fuel (time)
• Maximum Range Speed
– A certain speed that will allow the aircraft to fly the furthest
distance.
• Maximum Endurance Speed
– A certain speed that will allow the aircraft to stay in the air for the
longest time
• Best Range Speed
– A practical speed that will allow the aircraft to fly the furthest
distance.
• Best Endurance Speed
– A practical speed that will allow the aircraft to stay in the air for
the longest time
Principles
• Maximum Range
– Range is a certain distance,
usually measured in nautical
miles
– Range is dependent on drag
– Maximum range occurs when
total drag is at a minimum
Principles
• Maximum Endurance
– Is a certain amount of time an
aircraft can spend in the air.
– Endurance is dependant on the
power setting of the aircraft
– Power setting determines the
burn-off (usually in Litres per
hour)
– Minimum power means minimal
fuel flow
– Maximum Endurance occurs at
minimum power
Principles
• Best Range
– Is a power setting taken from the POH (5-19)
• Best Endurance
– Is a power setting taken from the POH (5-20)
Considerations
• Effect of Airspeed
Considerations
• Effect of Weight
Considerations
• Effect of Wind
• Power
Considerations
• Effect of Altitude (5-19 and 5-20)
Airmanship
• Always set the power according to cruise tables
in POH
• Always lean the mixture in accordance to the
company policy
• Never exceed any of the aircraft’s maximum
limitations (MTOW or VNE)
Summary of Range and Endurance
• “For best range you should fly high and fast”
• “For best endurance you should fly low and
slow”