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HUD

The dial cluster is shown to the pilot and the co-pilot whenever they are in a cockpit seat.
On the CV-22B and MV-22B Ospreys a line above the dials reads NAC and the nacelle angle — 90 is straight up, 0 is fully forward — and shows SLOW or GND when your speed or the ground is holding the nacelles back, STALL when the wing is close to stalling, with a pulsing stall horn in the cockpit that only the people inside hear, and a red PROP when the proprotors are about to hit the ground with the landing gear up. On every aircraft with a top speed (flight.maxAirspeed) over 162 knots — the Ospreys, the Mi-24, both Chinooks, the Merlin and the Gazelle — the speed dial reads double range, to about 324 knots, so the needle does not sit pinned in a cruise; the number in the middle is the real speed. See CV-22B Osprey.

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HUD styles, size and units

From v0.4.7 the server picks one of thirteen HUD looks for everyone with crew.hudStyle: 0 is the Classic dial cluster described above, and 1 to 12 are new styles — Glass Cockpit, Glass Compact, Steam Gauges, Floating Arcs, Tactical HMD, Cluster Ring, Flight Strip, Flight Card, Big Numbers, Warning Panel, Radar Display and Hybrid. They show the same information, including the control, Autohover and Mouse Flight badges, each with its proper on and off icon. See Global Settings. Each player can still set the HUD up for themselves in the Pilot Panel: HUD units (knots and feet, or km/h and metres), HUD size (Small, Normal or Large — it scales with your screen height, so it looks the same on wide and ultra-wide screens) and HUD opacity. The flight HUD and the damage panel hide while your inventory is open, and while you look through the chin camera. The HUD also shows the terrain warnings — TERRAIN, OBSTACLE, SINK RATE and PULL UP — and the radar warning RWR with the direction of the radar painting you.

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Key prompts

While you sit in a helicopter, the hold prompts sit on the left of the screen instead of in the middle: Start Engine (HOLD) / Stop Engine (HOLD) on the left mouse button with a progress bar, then Get out (HOLD), then the cockpit action list. Switch Seats, Move to Cabin and the window prompts stay in the middle.

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Damage Panel (top-left)

The damage panel is a separate panel in the top-left corner, not part of the dial cluster. It carries the helicopter’s name, its overall health bar, the six damage zone indicators, and four status icons. The two rotor indicators are named for the aircraft: MROT and TROT (main and tail), FROT and RROT (front and rear) on the Chinooks, and LROT and RROT (left and right) on the Ospreys. A destroyed or snapped-off rotor shows red. The four status icons are:
Because those icons live on the damage panel, hiding the panel hides them too. Press H to hide or show the panel for yourself, or set crew.damageZonePanelEnabled = 0 in mod_config.json to remove it for everybody on the server.

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Cockpit Hint Row

Below the cluster, one hint row shows the cockpit action you currently have selected — ramp, landing gear, sling, winch or door. Change it with the mouse wheel and use it with F. See the Controls Reference. While a sling load is hooked on, the sling row also shows the rope length in metres, so you can see exactly where the winch has the load.

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Fuel System

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Tank size and burn rate

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Unlimited fuel

Set fuel.burnLPH to 0 to stop fuel being used at all. Change this on servers where refuelling is just a chore.

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Working out a flight time

Example — a UH-1H that lasts exactly 2 hours:

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How to refuel

There are two ways. From a container. Hold a fuel container, get within fuel.refuelDistance metres of the helicopter (default 5.0), and look at the fuel filler point on the model. The refuel prompt appears; use it to pour the fuel in. At a fuel station. Park the helicopter within about 12 m of a fuel station (a little further for the big aircraft) — the forecourt roof counts. Walk to the filler point with empty hands and hold F on “Refuel at Fuel Station”. No container needed. It fills at 1% a second, so an empty tank takes about 100 seconds on any aircraft, big or small. Works with the vanilla and Enoch stations and with pump mods built on the same fuel-station class. What you can refuel from: Those percentages and the pour speed can all be changed in mod_config.json. See Global Settings for the full table.
CZAutoz_HeliDrum still works as an old name for CZ_HeliDrum, so existing types.xml entries keep going. Use CZ_HeliDrum for anything new.
Helicopters spawned by the Central Economy (types.xml / events.xml) start with a partial tank — somewhere between 20% and 45%.

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Refuel settings

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Low fuel warning

A beep warns the crew when fuel is getting low. It only sounds with the engine running, and everyone aboard hears it. The beeping speeds up as the tank empties: every 4 seconds at first, then every 2.5 seconds below 15%, every 1.5 seconds below 10%, and every half second below 5%.
The warning threshold lives in mod_config.json under crew. The volume settings (audio.engineVolume, audio.rotorVolume, audio.warningVolume, audio.crashVolume) are set per aircraft in each helicopter’s own JSON file under audio. See Per-Helicopter Settings.