HOVERWhat does the collective do in a hover?
Sets power / height above the surface.
HOVERWhat does the cyclic do in a hover?
Controls position over the ground (counters fore/aft & lateral drift).
HOVERWhat do the antitorque pedals do in a hover?
Hold heading by balancing main-rotor torque.
HOVERWhere should your eyes be while hovering?
Well ahead — not staring down at the skids; make small anticipatory corrections.
GEIGE vs. OGE hover power?
In ground effect needs LESS power than out of ground effect.
GERoughly how high does ground effect extend?
About one rotor diameter above the surface.
GEWhy does an OGE or high-DA hover matter for planning?
A hover you can hold low/IGE may be impossible OGE or at high density altitude.
TAXIHover taxi — regime, height, use?
In ground effect (IGE), slow, below ~25 ft AGL; short repositioning. High fuel burn, strong downwash.
TAXIAir taxi — regime, height, use?
Out of ground effect (OGE), typically ~40 ft AGL (AIM ceiling 100 ft); greater distances; may exceed ~20 kt.
TAXISurface (ground) taxi — when?
On the surface via taxiways; mainly wheel-equipped helicopters. Least fuel/downwash.
TAXIWhich taxi burns the most fuel / makes the most downwash?
Hover taxi.
TAXIPick a taxi type based on what factors?
Distance, surface, traffic, and density altitude.
RISKPrimary close-to-ground hover hazard?
Dynamic rollover — pivot about a ground-contacting skid.
RISKIf a dynamic-rollover pivot begins, what's the recovery input?
Smoothly lower the collective; keep the aircraft level & drift-free.
RISKBefore any air taxi, what must you do?
Clear the path AND the area your rotor-wash reaches; avoid people, vehicles, parked aircraft.
PERFWhy can an air taxi be unsafe on a hot/high day?
It's low, slow flight near OGE limits; rising power demand (e.g., downwind) can exceed power available.