Drone Wind Turbine Inspection India
5+ lakh
safe flights
70%
Cost reduction vs manual
48hr
Report turnaround
3mm
Defect resolution
<1cm
Data Accuracy
The Service
Wind Turbine Inspection Using Drones
Drone-based wind turbine inspection uses high-resolution 4K cameras, calibrated thermal sensors, and AI analytics to assess turbine blades and structures replacing risky manual climbing with faster, safer aerial imaging.
At hub heights of 80–140 metres, a DGCA-certified Remote Pilot positions the aircraft at 1–3 metre standoff distances, capturing millimetre-level imagery of every blade surface from root to tip. The technique combines close-range photogrammetry with radiometric thermal data to detect defects invisible to any ground-level survey.
Fully compliant with DGCA’s Unmanned Aircraft System Rules 2021, Lesoko’s inspections are accepted by insurance underwriters, turbine OEMs, and lender technical advisors as formal inspection records.
- 4K RGB Cameras
- Close-Range Photogrammetry
- GPS Georeferencing
- Thermal Imaging
- AI Defect Analytics
- DGCA Certified
Components Inspected
Tower
Structural cracks, corrosion, flange integrity
Nacelle
Hub, spinner, yaw bearing, seal failures
Hub
Root attachment, blade pitch bearings
Blades (×3, all surfaces)
Leading & trailing edge, suction & pressure sides
Key Benefit
Drones complete inspections in under 60 minutes, cut costs by 50–60%, minimise downtime, eliminate height-related safety risks, and generate precise geotagged defect reports.
What We Detect
Defects in Wind Turbine Blades
Erosion
Leading edge erosion rated per IEC 61400-5 Grade 1–4 classification
Thermal Hotspot
Internal delamination and moisture ingress via thermal anomaly mapping
Oil Pollution
Gearbox and hydraulic oil contamination on blade surfaces
Paint Peel-off
Gel-coat and protective coating delamination exposing composite substrate
Surface Crack
Trailing edge splits and structural cracks at blade root attachments
Surface Seepage
Moisture ingress zones confirmed by thermal imaging cross-reference
Tip Erosion
High-velocity tip zone erosion causing AEP loss up to 2% per turbine
Wearing
Vortex generator detachment and surface roughness degradation
Structure of a Wind Turbine Blade
Understanding blade structure is essential to understanding why each surface requires dedicated inspection passes.
Leading Edge
First contact with wind. Most erosion-prone surface. Inspected at 1–3m standoff.
Pressure Side
High-pressure surface generating lift. Crack formation zone.
Trailing Edge
Adhesive bond line. Trailing edge splits detected via RGB at 2mm resolution.
Suction Side
Low-pressure surface. Delamination detected via thermal anomaly mapping.
How Does Drone Inspection Work?
Six structured steps conducted by DGCA-certified Remote Pilots from pre-flight turbine positioning to 48-hour report delivery.
Pre-inspection Coordination & Turbine Positioning
Coordinate with the wind farm SCADA operator to bring each turbine to a feathered blade position. Blades aligned vertically, rotor locked. This gives the drone unobstructed access to all four surfaces on each blade and is the single most critical safety step before any close-proximity pass.
Site Survey & Flight Plan Preparation
Conduct a ground-level site walk to map obstacles, assess wind direction and turbulence from adjacent turbines, and set waypoints for each blade pass. At sites in Tamil Nadu's Tirunelveli corridor or Gujarat's Kutch zone, terrain and coastal wind shear require mission-specific planning to maintain stable hover at hub height.
Close-Proximity Blade Inspection Passes
Fly systematic root-to-tip passes on each blade face at 1–3 metre standoff. The RGB camera captures overlapping high-resolution frames; the thermal sensor simultaneously records surface temperature differentials flagging subsurface moisture ingress or delamination zones.
Nacelle & Tower Structure Inspection
After blade passes, reposition for a nacelle inspection pass covering the hub, spinner cone, yaw bearing housing, and tower top flanges. Structural cracks, corrosion zones, and seal failures are documented with GPS-tagged imagery for each finding.
Defect Tagging & Georeferencing
Every defect identified during the flight is tagged in-field with GPS coordinates, blade position (root/mid/tip), and surface (leading/trailing/suction/pressure). Severity is classified using a four-tier IEC-aligned rating system before the aircraft is recovered.
48-Hour Report Delivery
Process all imagery and thermal data using photogrammetric analysis software to produce a blade-by-blade defect map, erosion rating per IEC 61400-5 thresholds, and repair priority matrix. Delivered within 48 hours. Ready for your O&M contractor, OEM warranty team, or insurance underwriter.
Drone inspection vs manual inspection
A practical side-by-side for wind farm operators and O&M teams evaluating inspection methods.
| Factor | Drone inspection (Lesoko) | Manual / rope access |
|---|---|---|
| Time per turbine | Under 60 minutes | 6–12 hours |
| Worker height risk | None — ground-based operation | High — 80–120m altitude |
| Turbine downtime required | Minimal (<60 mins) | Full shutdown required |
| Defect detection depth | Surface + subsurface via thermal | Surface only, limited coverage |
| Coverage per inspection | 100% blade surface, geotagged | Partial; depends on access point |
| Report format | Structured, annotated, OEM-ready | Subjective; inspector-dependent |
| Cost per turbine | 40–60% lower | High — specialist teams + equipment |
Key Benefits
Why Wind Farm Operators Choose Lesoko
Inspect Turbines Without Taking Them Offline
Rope-access inspection requires 4–6 hours of shutdown per turbine. Drone inspection is conducted while the turbine is stationary for blade positioning only. Across a 50-turbine site, that's a multi-day schedule advantage with no generation-hour losses. Wind farm aerial inspection at this speed is achievable by no other method.
Detect Blade Erosion Before It Hits Your P50
Leading edge erosion increases surface roughness, disrupts laminar airflow, and reduces lift coefficient. A 1mm erosion depth can degrade annual energy production by 0.5–2% per turbine. Drone inspection at 1–3-metre standoff detects erosion at IEC Grade 2 before it reaches structural severity, reducing blade repair cost by up to 60%.
Eliminate Safety Risk of Rope Access at Height
No technician ascends the nacelle for inspection. The Remote Pilot operates from ground level. Incident reporting requirements, working-at-height permits, and rope-access insurance premiums are all eliminated for the inspection phase.
Georeferenced Records for Insurance & Warranty
Every defect is GPS-tagged with blade position and IEC severity classification creating an audit trail that insurance underwriters and turbine OEMs accept as a formal inspection record. When a blade failure occurs, a georeferenced prior-inspection report is the evidentiary basis for warranty claims and insurance submissions.
Pan-India Scalability With No Mobilisation Gap
With DGCA-certified Remote Pilots deployed across wind-active states, Lesoko mobilises to any site in Tamil Nadu, Gujarat, Rajasthan, Maharashtra, Karnataka, or Andhra Pradesh without logistics overhead. IPPs managing distributed portfolios across multiple states run a single inspection contract on a coordinated schedule.
Hard-Commitment Report Turnaround
The 48-hour report turnaround is a contractual commitment not a best-efforts estimate. Your O&M team or EPC contractor can plan repair sequences without waiting weeks. All imagery, defect maps, and thermal data included. Raw files available for your engineering team or OEM submission.
What We Detect
Defects in Wind Turbine Blades
Close-Range RGB Image Set
Root to tip, all three blades, all four surfaces. Leading edge, trailing edge, suction and pressure sides
Nacelle & Tower Inspection Imagery
Annotated structural findings on hub, spinner, yaw bearings, and tower top flanges
3D Blade Surface Model
Photogrammetric model for detailed erosion profiling available on request for OEM submission
Thermal Anomaly Map
Subsurface delamination, moisture ingress, and heat signature deviations flagged with spatial coordinates
Repair Priority Matrix
Defects ranked by urgency: Immediate action / Next maintenance window / Monitor only
Georeferenced Defect Map
GPS coordinates, blade position, and IEC severity classification (Grade 1–4) for every finding
Georeferenced Defect Map
GPS coordinates, blade position, and IEC severity classification (Grade 1–4) for every finding
Raw Data Files
All imagery and thermal data for your engineering team's independent review or OEM submission
Blade Condition Report
Leading edge erosion rating per IEC 61400-5 classification thresholds, blade by blade
Inspection Flight Log & DGCA Compliance Docs
Full regulatory documentation package; accepted by insurance underwriters and lender TAs
Watch How Lesoko Inspects a Wind Turbine
Trusted By Industry leaders
Wind Turbine Inspection Across Every Wind State in India
DGCA-certified pilots deployed across India's primary wind corridors — no mobilisation delay from a single hub city. Wherever your turbines are, Lesoko is already operational nearby.
Deployed across India
Lesoko pilots are based in and around India's major wind corridors. Tamil Nadu, Gujarat, Rajasthan, Karnataka, Maharashtra, and Andhra Pradesh with established operational presence, local airspace knowledge, and DGCA permissions already in place. For emerging wind states including Madhya Pradesh, Himachal Pradesh, Uttarakhand, and Telangana, we mobilise with minimal lead time from the nearest active base.
Every Indian wind condition
India's wind environments are not uniform. Coastal salt spray in Tamil Nadu and Andhra Pradesh accelerates leading-edge erosion. Abrasive dust storms in Rajasthan cause surface degradation invisible to ground survey. Post-cyclone damage assessment in Gujarat demands rapid mobilisation. Our inspection protocols and defect classification are calibrated to the specific stresses each Indian wind corridor produces on blade composites.
Pan-India reporting
Whether your portfolio spans a single Tamil Nadu wind farm or IPP assets across Rajasthan, Karnataka, Gujarat, Maharashtra, and AP, Lesoko delivers the same structured inspection report format blade diagrams, geotagged defect imagery, Cat-1/Cat-2 severity classification, and OEM-compatible documentation within 48 hours of the final flight, regardless of site location. Your O&M team, lender, and insurer read the same format from Tirunelveli to Jaisalmer.
States served
Lesoko provides DGCA-certified drone wind turbine inspection services across Tamil Nadu, Gujarat, Rajasthan, Karnataka, Maharashtra, Andhra Pradesh, Telangana, Madhya Pradesh, Himachal Pradesh, Uttarakhand, West Bengal, Odisha, Kerala, Punjab, Haryana, Jharkhand, Chhattisgarh, and all other states and union territories in India with operational or under-development wind energy capacity.
Ready to Protect Your Wind Assets?
Phone/ Whatsapp
+91 78457 26375
Email Us
sales@lesoko.in
Head Office
Request Inspection Quote
Frequently Asked Questions About Drone Wind Turbine Inspection in India
India’s largest wind energy states are Tamil Nadu (~10 GW), Gujarat (~8 GW), Rajasthan (~7 GW), Karnataka (~6 GW), Maharashtra (~5 GW), and Andhra Pradesh (~4 GW). Together these six states account for over 90% of India’s installed wind capacity. Lesoko operates across all of these states with licensed pilots and local deployment capability.