NCHF Ground School — FlashcardsIRA-H · Area IV · Flight by Reference to Instruments · print-friendly
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Flashcards — IRA-H Area IV Flight by Reference to Instruments (Lessons 08–10)

SCAN
Control vs. performance instruments?
Control = attitude indicator + power instruments (you change these). Performance = altimeter, ASI, VSI, heading, turn (you read these to confirm).
SCAN
Control/performance method in one line?
Set an attitude & power you know gives the result, then cross-check the performance instruments to verify.
SCAN
Most common scan error?
Fixation — staring at one instrument and letting other parameters drift. Keep the cross-check moving.
MNVR
The four-step cycle for any basic maneuver?
Establish, Trim, Cross-check, Adjust — repeated continuously.
MNVR
Standard-rate turn = ?
3° per second (a 360° turn in 2 minutes); bank to the standard-rate index on the turn indicator.
MNVR
Leading the level-off from a climb/descent?
Start the level-off about 10% of the vertical speed before the target altitude (e.g., ~50 ft for 500 ft/min).
UA
Nose-low unusual attitude — instrument signs?
Airspeed increasing, altimeter/VSI showing descent. Reduce power, level wings, ease back to level pitch.
UA
Nose-high unusual attitude — instrument signs?
Airspeed decreasing, altimeter/VSI showing climb. Add power, gently lower the nose to level.
UA
Why use ASI/altimeter/VSI to recognize an upset?
The attitude indicator can be unreliable at extreme attitudes; the performance instruments confirm what's happening.
UA
Robinson low-G rule during recovery?
Never abrupt forward cyclic. If low-G is sensed, gently aft cyclic to reload the rotor before lateral cyclic. Verify R44 SN wording.
RISK
Two killers in unusual-attitude recovery?
Trusting your senses over the panel, and over-controlling. Trust instruments; recover smoothly.
R44
Where are level-cruise/climb/descent power settings & Vne?
R44 POH Normal Procedures & Performance (settings); Limitations (Vne). R44 normally VFR-only — verify.