RMIT飞行训练课件－Range&Endurance 航程和续航时间

航空

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航空

RMIT Instructor Rating Mass Briefs Issue 1 /2004 Page 1
RANGE & ENDURANCE
Aim: To learn the principles of range and endurance of an aircraft in flight. And the
factors that effect these conditions.
Application:
- Long distance flying = maximum Range
- Holding = maximum Endurance
Revision:
 Power
 Drag
Definitions:
 Range
- air distance travelled for a given fuel burn off (distance)
 Endurance
- time in flight for a given amount of fuel (time)
 Range Speed
 Endurance Speed
Brief 30
RMIT Flight Training Range & Endurance
RMIT Instructor Rating Mass Briefs Issue 1 /2004 Page 2
Principles:
 Maximum Range
- Power is defined as: force  velocity
Preq = Treq  TAS
= D  TAS
P / TAS ratio = D  TAS
TAS
= D
Maximum Range occurs when Total Drag is a minimum!
 Maximum Endurance
- Endurance is dependant on minimum fuel flow for given time in air.
- Fuel flow depends upon power setting. So minimum fuel flow occurs at
minimum power for S&L flight.
Maximum Endurance occurs at minimum power!
Brief 30
RMIT Flight Training Range & Endurance
RMIT Instructor Rating Mass Briefs Issue 1 /2004 Page 3
Considerations:
 Airspeed
- = decreased R and decreased E
-  = decreased R and decreased E
 Weight
-  = decreased R (L  fly faster or AoA  D)
- = decreased E (W = req FF)
- = increased R and decreased E
 Wind
- HW = decreased R and no change to E
- TW = increased R and no change to E
 Power
-  = decreased R (  TAS constant /TAS)
- = decreased E (  FF)
- = decreased R and decreased E (can’t maintain S&L  )
 Altitude
-  = increased R (ALT,  D/TAS)
- = decreased E (ALT,   and FF)
- = decreased R and increased E
Airmanship:
- Set power according to cruise tables in POH
- Lean mixture in cruise
- Never exceed MTOW or VNE
RMIT Flight Training Range & Endurance