Teaching and Learning Flying - Airplane Instrument Rating
Teaching and Learning Flying - Airplane Instrument Rating
Attitude Instrument Flying
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DEFINITION
Attitude instrument flying (AIF) may be defined as the control of an aircraft's spatial position by using the flight instruments rather than outside visual references.
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SAFETY FACTORS
Proper interpretation of flight instruments yields essentially the same information about the aircraft's spatial orientation as outside visual references. Safe, precise, proficient performance of any instrument flight maneuver depends fundamentally on mastery of basic AIF. Competence in AIF flying not only makes possible safe, precise flight in IMC, but also enhances the safety and accuracy of VFR flight. Thorough understanding of the operation and use of all the flight instruments plus regular practice leads to prompt recognition of instrument failure and transition to safe partial panel attitude instrument flight.
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TOLERANCES
Instrument Rating PTS (FAA-S-8081-4D)
IV. A. To determine that the applicant can perform basic flight maneuvers
1. Exhibits adequate knowledge of the elements related to attitude instrument flying during straight-and-level, climbs, turns and descents while conducting various instrument procedures.
2. Maintains altitude within +/- 100 feet during level flight, headings within +/- 10°, airspeed within +/- 10 knots, and bank angles within +/- 5° during turns.
3. Uses proper instrument crosscheck and interpretation, and applies the appropriate pitch, bank and trim corrections when applicable.
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OBJECTIVES
To encourage mastery of AIF to increase pilot proficiency and enhance the safety of flight
To develop the student's knowledge and skill in AIF to meet instrument pilot PTS
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PROCEDURES
Preflight
• Instruments more precise than visual references
• Two basic methods
Control and performance
Primary and supporting[pic]
Pitch instruments
attitude indicator (AI)
altimeter (ALT)
airspeed indicator (ASI)
vertical speed indicator (VSI)
Bank instruments
attitude indicator (AI)
heading indicator (HI)
magnetic compass (MC)
turn coordinator (TC)
Power instruments
airspeed indicator (ASI)
engine instruments
manifold pressure gauge (MP)
tachometer (RPM)
For any maneuver or flight condition
Primary instruments
One in each group (pitch, bank, power)
Provide most pertinent and essential information
Indication stable with correct flight (shows greatest change with improper aircraft control)
Secondary instruments
Back up and supplement primary instruments
• Fundamental skills
o Cross-check
Continuous, logical observation of instruments for attitude and performance information
[pic]
Proficient pilot adjusts scan rate and sequence to specific flight situation
Common errors
Fixation
Omission
Emphasis
o Interpretation
Applied knowledge of
instrument construction and operating principles
aircraft performance capabilities (POH)
Learn what performance to expect and combination of instruments to interpret for each flight condition
o Control
Four components
Pitch
Bank
Power
Trim
Common error - Tension - use relaxed touch
• The Three Step Scan (Rod Machado)
o Select attitude and power. Trim and confirm.
Know and use predetermined attitudes and power settings for basic flight conditions
Confirm proper attitude indicator response to control input
Turn triangle of agreement
1. attitude indicator
2. turn coordinator
3. magnetic compass
Pitch triangle of agreement
4. attitude indicator
5. vertical speed indicator
6. alternate static system (activate to resolve disagreement)
o Radial scan the primary instruments.
Start at and alternate back to the attitude indicator
o Trim using the VSI and monitor scan the Big 6
Trim rudder
Trim elevator for constant VSI in SLF or constant rate climb or descent
Scan the six flight instruments and repeat
•
• SLF
SLF
Pitch
Bank
Power
Primary
ALT
HI
ASI
Secondary
AI, VSI
AI, TC
MP, RPM
•
• Turns
Turn, constant airspeed - Full panel
Pitch
Bank
Power
Primary
ALT
TC
ASI
Secondary
AI, VSI
AI
MP, RPM
•
• Change of airpseed
Airspeed change in SLF - Full panel
Pitch
Bank
Power
Primary
ALT
HI
MP(RPM) -> ASI
Secondary
AI, VSI
AI, TC
ASI -> MP(RPM)
•
Airspeed change in turn - Full panel
Pitch
Bank
Power
Primary
ALT
TC
MP(RPM) -> ASI
Secondary
AI, VSI
AI
ASI -> MP(RPM)
•
• Constant airspeed climbs and descents
Climb (or descent), straight, constant airspeed
Full panel
Pitch
Bank
Power
Primary
AI -> ASI
HI
MP(RPM)
Secondary
AI, VSI
AI, TC
-> ASI
•
• Constant rate climbs and descents
Climb (or descent), straight, constant rate
Full panel
Pitch
Bank
Power
Primary
VSI
HI
ASI
Secondary
AI
AI, TC
MP(RPM)
•
Inflight
• Demonstrate while desribing instrument scan
• Coach student practice (actual or simulated IMC)
o SLF
o Turns
o Change of airpseed
o Constant airspeed climbs and descents
o Constant rate climbs and descents
Postflight
Critique student performance
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COMMON ERRORS
• Fixation, omission, emphasis during cross-check
• Overcontrolling
Smooth, gently control pressures
Use two step corrections
1. Just enough control pressure to stop needle movement
2. A bit more to start smooth correction
• Uncoordinated use of controls
Keep the ball centered
• Improper trim control
Trim to relieve control pressures
Small, frequent adjustments
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References
14 CFR parts 61, 91
AIM
Instrument Flying Handbook, FAA-H-8083-15, 1999
Instrument Rating PTS, FAA-S-8081-4D, April 2004
Instrument Instructor PTS, FAA-S-8081-9B, June 2001
The Instrument Flight Manual, Sixth Edition William K. Kershner
Mastering Instrument Flying, Third Edition Henry Sollman and Sherwood Harris
Intrument Flight Maneuvers and Practical Test Prep, 4th Edition Irvin N. Gleim
Rod Machado's Instrument Pilot's Survival Manual, 2nd Edition Rod Machado | |
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