Learn how to perform helicopter autorotation in a flight simulator, manage rotor RPM, time the flare and fix common touchdown mistakes.
Helicopter autorotation is an unpowered descent in which upward airflow through the rotor keeps the blades turning after engine power is lost. In a flight simulator, lower collective promptly, control rotor RPM, establish the aircraft’s recommended autorotation speed, flare near the ground, level the helicopter and use the rotor’s stored energy to cushion touchdown.
For our Aviation & Real-World Flying readers, a desktop simulator is useful for learning the sequence, instrument scan and sight picture. It cannot reproduce physical cues or qualify anyone to attempt the manoeuvre in a real helicopter; real autorotation training requires an instructor and the aircraft’s approved procedure.
What keeps a helicopter rotor turning during autorotation?
Upward airflow through the descending rotor disc produces aerodynamic force that keeps the rotor turning without engine power. A freewheeling unit allows the rotor to overrun the slowing or stopped engine, much like a bicycle wheel can keep turning while the pedals stop.
The rotor disc contains driving, driven and stalled regions. The driving region supplies the force that sustains rotation, while the driven region consumes some of that energy to produce lift. The pilot manages this balance through collective pitch, airspeed and manoeuvring.
Autorotation therefore does not mean the helicopter simply glides with a stopped rotor. Rotor RPM is the energy reserve needed for the flare and touchdown, and losing it early is the central danger.
How do you practise helicopter autorotation in a flight simulator?
A safe simulator exercise starts high enough to stabilise the descent, correct mistakes and recover power before reaching the ground. Use the helicopter’s own checklist or flight manual because rotor limits, target speeds and control responses vary substantially between types.
Simulator and control setup
A useful autorotation exercise needs separate cyclic, collective, anti-torque pedal and throttle or governor controls. Check that lowering the physical collective actually reduces blade pitch; a reversed or combined axis can make a correct entry impossible. Our guide to mapping cyclic, collective, pedals and throttle correctly covers the basic control arrangement.
Use a realistic flight model, disable intrusive stability assists and confirm that the selected helicopter models rotor inertia and freewheeling. X-Plane pilots should verify the separate axis using our X-Plane 12 helicopter-control setup, while DCS pilots may need additional axis tuning described in our DCS helicopter binding guide.
Begin in calm weather over a long runway or large flat area. Save the flight at altitude so the same entry can be repeated. For Microsoft Flight Simulator, our explanation of setting up and recovering from an engine failure in MSFS 2024 covers the simulator-side failure controls.
Step-by-step autorotation procedure
The core sequence is lower collective, preserve rotor RPM, establish the glide, flare and spend the stored rotor energy only when touchdown is assured.
- Prepare the exercise. Note the helicopter’s recommended autorotation airspeed, permitted rotor-RPM range and recovery procedure. Stabilise at a safe altitude and choose a landing area before introducing the failure.
- Simulate the power loss. Use the simulator’s failure function or a reversible throttle-idle setup. For initial practice, avoid operating a fuel shut-off because that can turn a power-recovery exercise into a restart exercise.
- Lower collective promptly. Move it towards the type’s prescribed low-pitch position as power disappears. This reduces blade drag and prevents rotor RPM from decaying. Correct the power-off yaw with pedal and use cyclic to control attitude.
- Establish the autorotation. Set the published airspeed with cyclic and keep rotor RPM inside its permitted range with small collective adjustments. If the helicopter has separate engine and rotor tachometer indications, the needles should split as the rotor freewheels.
- Plan the approach. Keep the selected landing area within reach and make smooth, moderate turns. Steep banks increase rotor loading and can change rotor RPM quickly. Avoid chasing the landing point with large cyclic or collective inputs.
- Flare at the type-specific height. Apply aft cyclic smoothly to reduce forward speed and descent rate. The flare may also increase rotor RPM, but pulling too abruptly can balloon the helicopter and leave insufficient energy for touchdown.
- Level and cushion. Use forward cyclic to bring the helicopter towards its permitted touchdown attitude, maintain heading with pedals, then raise collective progressively to convert stored rotor energy into lift. Once collective is raised, that energy cannot be recovered without engine power.
- Complete the chosen recovery. For a power recovery, restore power at the point specified for that helicopter and anticipate returning torque with pedal. For a full touchdown, minimise lateral drift and accept only the forward speed and attitude permitted for the helicopter, undercarriage and surface.
Control roles during the descent
Collective controls rotor RPM most directly, while cyclic controls attitude and airspeed; the controls still interact throughout the manoeuvre.
| Control | Primary job | Common mistake |
|---|---|---|
| Collective | Manage blade pitch and rotor RPM; cushion touchdown | Holding excessive pitch after the failure or raising it too early |
| Cyclic | Set autorotation airspeed, aim the approach and flare | Using a violent aft input that balloons the helicopter |
| Pedals | Control yaw as engine torque disappears or returns | Keeping the powered-flight pedal position after torque changes |
| Throttle or governor | Introduce the failure and perform a power recovery | Trying to govern rotor RPM with engine controls during a true autorotation |
Power recovery versus full touchdown
A power recovery lets you practise the entry, descent and flare without committing to an unpowered landing. We recommend starting with recoveries at altitude, then progressively lowering the recovery point once the airspeed and rotor RPM remain stable.
A full-touchdown autorotation adds the hardest part: levelling the helicopter and timing the collective pull with finite rotor energy. Attempt it only after repeatable approaches and only in a simulator or helicopter model with credible rotor and ground-contact physics. Restoring maximum power abruptly at the last moment is not a substitute for the aircraft’s recovery procedure.
What airspeed and flare height should you use?
There is no universal autorotation speed or flare height for every helicopter. Use the values and cues published for the simulated aircraft rather than copying numbers from another type.
A helicopter may publish different speeds for minimum rate of descent and maximum glide distance. The maximum-range condition is generally faster, but wind, weight, density altitude and rotor RPM affect the result. Fly the indicated airspeed appropriate to the objective; do not substitute groundspeed simply because the landing area appears to move quickly across the screen.
Flare height depends on airspeed, descent rate, rotor inertia and the aircraft’s procedure. Flaring too high spends airspeed and rotor energy while significant height remains. Flaring too low leaves no time to reduce descent or level the skids or wheels before contact.
Why does a simulated autorotation go wrong?
Most failed simulator autorotations come from late collective reduction, incorrect control assignments or spending rotor energy before touchdown is assured.
| Symptom | Likely cause | Correction |
|---|---|---|
| Rotor RPM falls immediately | Collective lowered too slowly, wrong axis direction or excessive blade pitch | Restart higher, lower collective promptly and check axis calibration |
| Rotor RPM exceeds its limit | Collective held too low, excessive airspeed or increased loading in a turn | Raise collective slightly as the aircraft procedure permits and ease the manoeuvre |
| The landing area becomes unreachable | Wrong glide speed, excessive turning or poor allowance for wind | Select a closer area and use the type’s maximum-range technique when distance is required |
| The flare succeeds but the helicopter drops hard | Collective raised too early or the flare held until airspeed and RPM were exhausted | Preserve rotor energy, level at the correct time and cushion progressively |
| The helicopter yaws during power recovery | Engine torque returned without matching pedal input | Restore power smoothly and anticipate the helicopter’s torque direction |
| The rotor stops or never freewheels | Combined throttle and collective axes, active assists or simplified aircraft modelling | Separate the controls, remove conflicting assistance and test a more complete helicopter model |
An engine failure from a hover is a different exercise because there may be too little height or forward speed for a stabilised autorotation. Rotor inertia and the helicopter’s height–velocity limitations determine what is possible, so use the type-specific hover engine-failure procedure rather than forcing the cruise autorotation sequence into the available height.