Wind Turbine Blade Drone
Inspection Services in India

Zero Rope-Access Risk

Eliminate the need for rope-access technicians at 80-120 m heights. Drone inspection is non-contact, non-invasive, and fully DGCA-compliant — no turbine shutdown required.

Inspect 8-12 Turbines/Day

A single drone crew inspects up to 12 wind turbines per day with sub-millimetre defect resolution. Traditional rope access manages 1-2 per day at 3-5x the cost.

Multi-Spectrum Detection

Simultaneous RGB (48 MP) and thermal imaging detects surface cracks, internal delamination, lightning damage, and leading-edge erosion in a single flight pass.

AI-Classified Reports

AiServe Wind auto-classifies blade defects by severity, location (pressure/suction side, leading/trailing edge), and recommended intervention timeline.

Blade Surfaces

All three blades — pressure side, suction side, leading edge, and trailing edge — captured at 0.3-0.5 mm/px resolution for crack, erosion, and coating damage detection.

Nacelle & Hub

External nacelle housing, hub assembly, spinner cone, and pitch system housings inspected for corrosion, oil leaks, seal failures, and lightning receptor damage.

Tower Structure

Full tower survey from base to yaw platform — identifying bolt corrosion, weld cracks, paint degradation, and flange joint anomalies.

Foundation & Base

Ground-level and low-altitude survey of foundation ring, grout condition, cable entry points, and drainage systems for early structural degradation.

Leading-Edge Erosion

Rain, sand, and insect impact erode the leading edge, reducing aerodynamic efficiency by up to 5% AEP. Our drones measure erosion depth and roughness profile across the full span.

Lightning Strike Damage

Receptor burns, tracking marks, and internal delamination from lightning strikes — India's monsoon belt makes this the most common blade failure mode. Thermal imaging reveals hidden internal damage.

Surface Cracks & Coating Failure

Longitudinal and transverse cracks in gelcoat and leading-edge protection tape, identified at sub-millimetre resolution before they propagate into structural damage.

Delamination & Debonding

Separation between laminate layers or adhesive bond failure at trailing-edge closures — detectable through thermal gradient analysis during solar-heated inspection windows.

Vortex Generator & Add-On Damage

Missing, broken, or displaced vortex generators, serrated trailing edges, and gurney flaps — each impacting aerodynamic performance when damaged.

Nacelle Component Degradation

Oil staining from gearbox leaks, corroded cooling systems, damaged anemometers, and lightning receptor wear — all captured in high-resolution nacelle orbits.

Trailing-Edge Splits & Bond Failure

Openings along the trailing-edge bond line, most often in the outer third of the blade where flexing is greatest. Left alone these propagate inward and become one of the costlier structural repairs on a blade.

Tower Weld & Flange Corrosion

Corrosion at tower section flanges, weld seams and bolt connections, plus coating breakdown at the base. Coastal sites in Tamil Nadu and Gujarat degrade materially faster than inland ones.

Blade Root & Bolt Condition

Root-end cracking, bolt corrosion and pitch-bearing seal leakage inspected from close hover — an area conventional ground inspection cannot resolve and rope teams reach last.

Blade-Only Inspection

₹15,000–₹20,000

All 3 blades — RGB + thermal, AI defect report

Full Turbine Inspection

₹25,000–₹30,000

Blades + nacelle + tower + foundation survey

Wind Farm Package

Custom pricing

50+ turbines, volume discount, annual contracts available

Gujarat

Kutch, Jamnagar, Porbandar and Dwarka. Coastal salt exposure accelerates leading-edge erosion and flange corrosion, so blade surfaces here degrade faster than the inland average and reward a shorter inspection cycle. Ahmedabad base means short mobilisation.

Tamil Nadu

Muppandal, Kayathar, Tirunelveli and Coimbatore. The highest turbine density in India, much of it older machines well past warranty where blade condition drives remaining-life decisions. The northeast monsoon shifts the flying window later than the rest of the country.

Rajasthan

Jaisalmer, Barmer and Jodhpur. Abrasive desert dust is the dominant erosion mechanism here rather than rain, which produces a different leading-edge wear pattern and makes erosion-depth measurement the priority finding.

Karnataka

Chitradurga, Davangere, Gadag and Belgaum. Plateau terrain and hybrid wind-solar parks mean flight planning has to account for turbine spacing, rotor wake and shared airspace with panel-array survey work.

Maharashtra

Satara, Sangli, Ahmednagar, Dhule — established wind farm regions

Andhra Pradesh

Anantapur, Kurnool, Nandyal — emerging wind corridor

How many turbines can you inspect in a day?

A crew typically completes 6–12 turbines per day for a full four-surface blade inspection, depending on hub height, weather window and whether nacelle and tower passes are included. Wind speed is usually the limiting factor rather than daylight — sustained gusts above roughly 12 m/s stop flying regardless of how much of the day is left.

How long is each turbine stopped for?

The turbine needs to be stopped and the rotor parked, usually in a Y or rabbit-ear position, for the blade capture itself. That is a matter of minutes per turbine, not hours, and it is scheduled with your SCADA operator so several machines are parked in sequence rather than the whole farm at once.

Can you inspect blades in the monsoon or high winds?

No, and we would rather say so than promise a window we cannot fly. Blade imaging needs low wind, dry surfaces and reasonable light. Wet blades hide surface cracks and mask the thermal signature of delamination. Pre-monsoon and post-monsoon are the practical inspection windows in most of India.

How do you classify defect severity?

Findings are graded on a standard severity scale from cosmetic through to structural, each with a recommended action and timeframe, so your O&M team can separate what needs a repair campaign from what needs monitoring at the next inspection. Every defect is tagged to turbine ID, blade, surface and radial position.

Can you inspect internal blade structure as well as the exterior?

External inspection covers the surface and, through thermal imaging, some sub-surface delamination and bond-line issues. Genuine internal inspection of shear webs and spar caps needs a crawler or borescope inside the blade. We are clear about that boundary — drones dramatically reduce how many blades need internal inspection, but they do not replace it where structural doubt exists.

Do you inspect the tower and foundation as well as the blades?

Yes. A full pass covers blades, hub, nacelle exterior, tower sections and the visible foundation and base coating. Tower and foundation inspection adds little flight time once the crew is mobilised, and coastal sites in particular benefit because corrosion at flanges and the base is where degradation shows first.

How much does drone wind turbine inspection cost in India?

Drone-based wind turbine inspection costs ₹15,000–₹30,000 per turbine depending on turbine height, number of turbines, and scope (blades only vs full nacelle + tower). This is 60–80% cheaper than traditional rope-access inspection which costs ₹60,000–₹1,50,000 per turbine including mobilization, safety crew, and downtime.

Do wind turbines need to be shut down for drone inspection?

No. Drones inspect wind turbines with blades in a parked (stationary) position but without electrical shutdown. There is zero production loss during inspection. Traditional rope-access methods require full turbine shutdown for 4–8 hours per turbine.

What types of blade defects can drones detect?

Our drones detect leading-edge erosion, lightning strike damage, surface cracks, gelcoat failure, delamination, debonding at trailing edges, missing vortex generators, and internal structural damage. Thermal imaging reveals sub-surface defects like moisture ingress and adhesive bond failures invisible to the naked eye.

How often should wind turbines be inspected?

Industry best practice recommends annual drone inspection for all operational wind turbines. High-exposure turbines in coastal or lightning-prone areas (Gujarat coast, Tamil Nadu) should be inspected every 6 months. Post-monsoon and post-cyclone inspections are critical for Indian wind farms.

Is drone wind turbine inspection DGCA-compliant?

Yes. All AiRotor Labs drone operations are fully DGCA-compliant with certified Remote Pilot Licenses (RPL), Unmanned Aircraft Operator Permits (UAOP), and flight permissions. We carry ₹1 Cr third-party liability insurance and follow DGCA UAS Rules 2021.

What is the report format and turnaround time?

AI-classified inspection reports are delivered within 48 hours. Reports include GPS-referenced defect maps, severity classification per DNV-GL and IEC 61400-5 standards, 3D blade defect overlays, and priority-ranked maintenance recommendations. Reports are available as interactive dashboards and PDF downloads.