RMIT飞行训练课件－Shortfield Circuits 短跑道起落航线

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RMIT Flight Training Shortfield Circuits
RMIT Instructor Rating Mass Briefs Issue 1 /2004 Page 1 Brief 14
SHORTFIELD CIRCUITS
Aim: To operate safely and efficiently into and out of a field of marginal length, using
as little runway as possible.
Application:
- short/rough strips
- ALA’s
- obstacle clearance
Revision:
 P-Charts
FACTOR TODR LDR
Increase Weight ↑ ↑
Increase Headwind ↓ ↓
Increase Temperature ↑ ↑
Flap ↓ ↓
Upslope ↑ ↑
Definitions:
 Short Field
- When the runway length available and/or obstacle clearance gradients
are only just sufficient to satisfy take-off and landing requirements.
Principles:
TAKE OFF
 Flap - Reduces Vs therefore reducing VTOSS (1.2Vs)
- Shorter take off run and distance to 50 ft AGL
- Provides better obstacle clearance
 Power Vs Brakes
- Ensures maximum power available to achieve maximum acceleration
- Exercise caution on gravel surfaces
 Climb Performance
- Rate and Angle of climb will both decrease
APPROACH AND LANDING
 Flap - Reduces Vs allowing approach at minimum speed (1.3Vs)
 Power - Allows slower flight on the back of the drag curve
- Inboard surfaces (rudder/elevator) more effective
 Approach Profile
-Same flight path flown with a higher nose attitude due less airspeed
 Landing- Shorter positive flare and touchdown
- Use maximum braking as required
RMIT Flight Training Shortfield Circuits
RMIT Instructor Rating Mass Briefs Issue 1 /2004 Page 2 Brief 14
Considerations:
 REGION OF REVERSE COMMAND
 OFF PROFILE – If gross overshoot occurs on approach, be conservative,
conduct a missed approach and try again. Don’t push a tight situation.
 GUSTY CONDITIONS – There is no allowable tolerance below the minimum
specified safe speeds. The speeds flown in gusty conditions with fluctuating
airspeeds will need to be increased to continually maintain a safe margin over the
stall. Therefore, it may not be practical to use shortfield techniques.
Air Exercise:
 Take-off
Lower nose
FLAP 0o
79 kt (BROC)
57 kt (BAOC)
To 200ft or clear of obstacles
“40 kt”
“51 kt ROTATE”
FLAP 10o
Power Vs Brakes
For soft field
apply full back
pressure until
rotation
DRAG
(Thrust Req’d)
IAS
More thrust req’d
to fly slower
RMIT Flight Training Shortfield Circuits
RMIT Instructor Rating Mass Briefs Issue 1 /2004 Page 3 Brief 14
 Landing
Airmanship:
- Smooth coordinated use of controls
- Restrict power on gravel surfaces
- Higher speeds in gusty conditions may be necessary
- If in doubt, go around
- Correct handover/takeover procedure
- Lookout
Apply maximum braking
without skidding
Maintain full back pressure
Target Threshold Speed 55 kt
Minimal hold-off and flare
Initiate touchdown with idle
power
57 kt
Increase power as
required to maintain speed
Normal approach until 300ft
Raise nose for 60 kt
APPROACH
PROFILE
DOES NOT
CHANGE

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