# How to Set Up Dynamic Idle in Betaflight for Better Low-Throttle Control
Dynamic Idle is one of Betaflight’s most underrated features. It automatically adjusts the idle RPM of your motors during flight, preventing desyncs during rapid throttle changes and giving you smoother control during zero-throttle maneuvers like dives and inverted moves. If you’ve ever experienced a motor stalling during a split-S or power loop, Dynamic Idle is the fix.
## What Is Dynamic Idle?
Traditional idle uses a fixed throttle percentage (usually 4-6%). When you cut throttle to zero, all four motors spin at this fixed rate. The problem? During aggressive maneuvers, the PID controller may demand one motor to spin much slower than the idle speed — creating a braking effect that can stall the motor entirely.
**Dynamic Idle solves this by setting idle in RPM instead of throttle percentage.** The flight controller continuously adjusts the idle throttle to maintain the target RPM regardless of prop load, battery sag, or PID demands.
## Benefits of Dynamic Idle
| Benefit | Explanation |
|———|————-|
| **Zero motor stalls** | Motors never drop below the target RPM, even during aggressive zero-throttle maneuvers |
| **Smoother inverted flight** | Consistent RPM means consistent control authority when upside down |
| **Better prop wash handling** | Motors respond faster coming out of zero-throttle dives |
| **Reduced desync risk** | ESC timing stays stable even during rapid throttle changes |
| **Cleaner video feed** | Less electrical noise from erratic motor behavior |
## Prerequisites
Before enabling Dynamic Idle, you MUST have:
1. **Bidirectional DShot enabled** — Dynamic Idle needs RPM telemetry from the ESCs to function. Without it, the FC cannot maintain target RPM.
2. **RPM filtering configured** — Bidirectional DShot enables RPM filters, which should be set up first.
3. **Betaflight 4.3 or newer** — Dynamic Idle was introduced in BF 4.3.
4. **BLHeli_32 or AM32 ESCs** — These support bidirectional DShot. BLHeli_S ESCs need the Bluejay firmware flash.
## Step-by-Step Setup
### Step 1: Verify Bidirectional DShot
1. Go to the **Configuration** tab in Betaflight Configurator.
2. Under ESC/Motor Features, confirm **DSHOT300** (or higher) is selected.
3. Toggle **Bidirectional DShot** to ON.
4. Click **Save and Reboot**.
### Step 2: Confirm RPM Telemetry
1. Go to the **Motors** tab.
2. Plug in a battery (props off!).
3. Spin up each motor individually using the slider.
4. In the RPM column, you should see live RPM data for each motor. If the RPM field shows errors or zero, troubleshoot your ESC protocol.
### Step 3: Enable Dynamic Idle
1. Go to the **PID Tuning** tab.
2. Scroll to the **Dynamic Idle** section.
3. Set **Dynamic Idle Value** (in RPM × 100):
| Drone Size | Recommended Dynamic Idle RPM |
|————|——————————|
| 5-inch freestyle (6S) | 35-45 (3500-4500 RPM) |
| 5-inch racing (6S) | 30-35 (3000-3500 RPM) |
| 3-4 inch micro | 40-50 (4000-5000 RPM) |
| 7-inch long range | 25-35 (2500-3500 RPM) |
| Tiny Whoop | 55-70 (5500-7000 RPM) |
### Step 4: Adjust Motor Idle Throttle
After enabling Dynamic Idle, reduce your **Motor Idle Throttle Value** (in the Configuration tab) to a lower value — typically **1-2%**. Dynamic Idle handles the actual RPM keeping, so the idle throttle now acts only as the minimum throttle value during arming.
### Step 5: Test Flight
1. Arm the drone on the bench (props on, safely). Listen for a smooth, consistent idle sound — no stuttering.
2. In flight, perform aggressive zero-throttle dives and inverted maneuvers. You should feel consistent control throughout.
3. Check the OSD for any RPM error flags after the flight.
## Common Issues and Fixes
| Issue | Cause | Fix |
|——-|——-|—–|
| Motors stutter at idle | Dynamic Idle RPM too low | Increase by 5 RPM increments |
| Motors sound too fast at idle | Dynamic Idle RPM too high | Decrease by 5 RPM increments |
| RPM errors in OSD | Bidirectional DShot not working on one ESC | Check ESC wiring and firmware |
| Drone drops on zero throttle | Dynamic Idle not actually enabled | Verify CLI: `get dyn_idle_min_rpm` |
## Dynamic Idle CLI Commands
For advanced tuning, you can use these CLI commands:
“`
set dyn_idle_min_rpm = 40 # Sets minimum RPM (×100)
set dyn_idle_max_increase = 150 # Max RPM increase allowed during active flight
set dyn_idle_p_gain = 50 # P-gain for idle RPM control
set dyn_idle_d_gain = 50 # D-gain for idle RPM control
save
“`
## Product Recommendation
A reliable flight controller with strong Bidirectional DShot support is essential. The **SpeedyBee F405 V4 Stack** is an excellent choice — it supports DShot600, has built-in Bluetooth for field tuning, and the 55A ESC handles even aggressive Dynamic Idle transitions. Check it out at [uavmodel.com](https://uavmodel.com).