Advanced Helicopter Controls (AHC) is a mod for Arma Reforger that brings realistic helicopter systems and multi-crew operations to the game. The mod focuses on sophisticated flight control systems, detailed startup sequences, and collaborative flight features.
The heart of AHC is the DAFCS autopilot system, providing PID-controlled flight automation with multiple hold modes that can be combined.
| Mode | Description |
|---|---|
| Altitude Hold (ALT) | Maintains target altitude using collective adjustments. Supports two sub-modes: Radar (AGL - Above Ground Level) and Barometric (MSL - Mean Sea Level). Pressing the toggle cycles through: OFF → Radar → Baro → OFF |
| Heading Hold (HDG) | Maintains target heading. Automatically transitions between yaw control (low speed/hover) and roll control (forward flight >40 knots) for natural turn coordination |
| Airspeed Hold (IAS) | Maintains target indicated airspeed using cyclic pitch adjustments. Uses burst-style corrections to overcome control input thresholds |
Modes can be combined for more advanced automation:
When ALT and IAS are both active, the system prioritizes altitude corrections during altitude emergencies (>10m error) and airspeed corrections during airspeed emergencies (>15kt error), blending both otherwise.
When a mode is activated, the current value is captured as the target:
Targets can be adjusted after capture using the appropriate adjustment actions (AdjustTargetAltitude(), AdjustTargetHeading(), AdjustTargetAirspeed()). These methods validate that the corresponding mode is active before applying the adjustment.