Mid-Size Plug-and-Play Industrial Flight Platform
A 6-axis industrial flight platform engineered for mid-tier UAV missions. 25 kg rated payload, 2000 mm wheelbase, and a K9 motor driving 34-inch folding props. Triple-IMU flight controller, dual RTK positioning, and IPX6/IPX7 power & battery management ship standard. Mission payloads attach via a unified PNP interface.
Core Technology
17 in-house engineered subsystems ship standard with every K9 — built around a triple-IMU flight controller and an IPX6/IPX7 power & battery system.
The Mid-Size Sweet Spot
25 kg rated payload on a 2000 mm wheelbase — 67% more lift than the K8 without stepping up to the heavy-duty K9PLUS class. The versatile middle of the K family.
Stepped-Up Power System
14S 22–32 Ah smart battery as standard — the same high-voltage architecture as the K9PLUS. Higher sustained current headroom than the K8's 12S pack, with hot-swap dual-battery option.
Balanced 85 KV · 7–9 kg/axis
34-inch folding props driven by K9 motors at 85 KV. 7–9 kg per-axis working thrust — enough lift for full industrial payloads, more efficient than the K9PLUS's larger prop at cruise speeds.
Industrial-Grade In-House Flight Controller
6 Subsystems
Full-Cage Integrated Damping Chamber
All FC components are mounted inside a single vibration-isolated cage. The integrated damper structure cuts flight-controller vibration, protects IMU accuracy, and eliminates the need for field calibration.
Aviation-Grade J30J Gold-Plated Terminal
Oxidation-resistant, anti-vibration, firmly connected. Industrial-grade signal integrity.
Integrated Design · Minimal & Reliable
RTK, datalink, and compute core integrated into one board. Fewer connectors, lower failure rate.
Triple-Redundant IMU · Triple Safety Net
Three independent IMUs vote in real time. A single sensor failure will not interrupt flight.
Dual RTK Antennas for Heading
Two RTK antennas resolve heading directly. Anti-jamming, cm-level positioning, no compass dependency.
Integrated IMU Thermal Chamber
The IMU is held at a stable 45 °C regardless of ambient temperature, so sensor drift stays flat from -20 °C to +65 °C. Heading and attitude remain accurate in extreme environments.
Power & Battery Subsystems
11 Subsystems
In-House Smart Battery · Built-in BMS
Self-developed pack with built-in battery management. Hot-swap ready, balance-managed, cycle-counted.
FOC Vector Control with Flux Observer
Negative-pressure cooling, Miller-clamp driving, FOC vector control, and flux observer deliver industry-leading energy efficiency. Motor drive efficiency breaks 98%, and the system runs at lower temperature for longer service life.
IPX6 / IPX7 System-Wide Waterproofing
The full electrical path is sealed to IPX6/IPX7. Operate confidently in rain, spray, and coastal conditions.
MOS Thermal Optimization · TOLLT
Thermal resistance down 40%, response speed up 20%. Sustained high-current operation without throttling.
Integrated Copper Busbar
Current transfer efficiency up 5%. Lower impedance, lower heat, higher peak-current margin.
Strong Stability · Dual Backup
CAN + PWM dual independent control signals. A single-channel fault does not stop the motors.
Extreme Conditions · No Power Loss
Wide-temperature electronics and rugged power design keep the platform powered on through harsh environments — from freezing mornings to hot midday operations.
Six-Channel Temperature Sensing
Cells, MOSFETs, and key nodes all monitored. Precise thermal control and multi-level protection.
Massive Data Storage
Charge, discharge, and abnormal events are logged in real time. Full traceability for warranty and analysis.
High-Precision V / I / T Sampling
Voltage, current, and temperature are sampled at high precision with fast system response.
High-Performance High-Temperature Magnet
Motor magnets rated for sustained high temperature, preserving motor efficiency and demagnetization resistance over the full flight envelope.
K9 Specifications
Reference parameters. Source: kuailun.com/uav/platform/m6k9. Actual performance depends on configuration, payload, weather, and battery choice.
Platform Parameters
Frame & Dimensions 6 items
| Configuration | 6-axis 6-propeller | Industrial hexacopter |
| Wheelbase | 2000mm | Six-axis unfolded diameter |
| Rated Payload | 25kg | Maximum mission load |
| Empty Weight | 19.6kg | Platform only |
| Expanded Size | 2035×1855×733mm | Full deployment |
| Folded Size | 1100×940×723mm | Compact transport |
Power & Propulsion 7 items
| Power Configuration | K9 | In-house motor system |
| Propeller | 34-inch folding | High efficiency |
| Recommended Thrust | 7–9 kg/axis | Per-axis working range |
| Max Thrust | 22.0 kg/axis | Peak capability |
| Motor KV | 85 | Optimized for 34" prop |
| Peak Current | 110A (50s) | Per ESC |
| Waterproof | IPx6 | System-wide sealing |
Battery & Endurance 3 items
| Battery | 14S 22–32Ah | Smart battery optional |
| Dual Battery | Supported (optional) | Hot-slot ready |
| Endurance | 30–50 min | Standard configuration |
Positioning & Environment 4 items
| RTK | Standard (high-precision helical antenna) | Heading via dual antenna |
| Positioning Accuracy | 1.5m CEP | Single point |
| GPS Bands | L1 / G1 / B1 / E1 / L1 / SBAS / IRNSS | Multi-constellation |
| Operating Temp | -20°C ~ +65°C | Wide range |
Platform Highlights
* Endurance is affected by battery capacity, payload, weather and flight profile.
K Series Comparison
Three flight platforms sharing the same modular architecture. Choose by payload, endurance, and mission profile.
| Parameter | K8 | K9 (Current) | K9PLUS |
|---|---|---|---|
| Rated Payload | 15kg | 25kg | 35kg |
| Empty Weight | 16.2kg | 19.6kg | 20.5kg |
| Wheelbase | 1783mm | 2000mm | 2000mm |
| Propeller | 30-inch | 34-inch | 36-inch |
| Power Configuration | K8 | K9 | K9plus |
| Expanded Size | 1800×1640×630mm | 2035×1855×733mm | 2035×1855×733mm |
| Folded Size | 1030×940×630mm | 1100×940×723mm | 1100×940×723mm |
| Recommended Battery | 12S 22–36Ah (smart optional) | 14S 22–32Ah (smart optional) | 14S 22–32Ah (smart optional) |
| Endurance | 30–50 min | 30–50 min | 30–50 min |
K9 Product Gallery
Real images of the K9 platform: full platform view on a white background, dual-battery configuration, folded transport state, and in-field operation.
