Proven Performance

Engineers With Drones Case Studies

Explore real-world engineering project briefs, operational strategies, and high-precision deliverables completed by our UAV survey teams.

Case Study // Infrastructure Inspection A stayed lattice radio mast on a high point in Cobh, Cork Harbour
Zero downtime
Cobh, Cork Harbour

Radio mast condition survey, Cobh

High-optical-zoom drone inspection of a critical stayed lattice radio mast — full structural condition report without interrupting live port communications.

Method Three-angle flight profile with high-optical zoom Captured at safe standoff distance to avoid radio frequency interference with live transmissions.
Key finding Heavy corrosion in lattice structure The lattice redundancy was the only thing keeping affected sections standing. Every defect classified and ID'd.
Case Study // Confined Space Exterior approach to derelict buildings inspected by confined space drone
Three derelict buildings
Dublin city

Confined space drone inspection of derelict buildings

Engineers With Drones used a confined space drone to inspect three derelict buildings — a bakery, a storage building, and a historic vat house — documenting structural condition without anyone entering the unsafe structures.

Method Confined space drone Cage-protected drone navigating GPS-denied interiors to capture structural condition across all three buildings.
Challenge Unsafe to enter, heritage sensitivity Collapsing roofs and unstable floors, with heritage features requiring documentation before redevelopment.
Case Study // Roof Inspection Aerial view of Naas Hospital showing the mix of older and newer buildings across the campus
20–30 roofs inspected
Naas Hospital, Co. Kildare

Roof inspection of Naas Hospital

Engineers With Drones surveyed every roof on the Naas Hospital campus using a sub-250g C0 drone, delivering per-roof annotated condition reports organised by the contractor’s own building names.

Time on site 1.5–2 days All 20–30 roofs across the full campus inspected with zero disruption to hospital operations.
Drone type Sub-250g C0 drone Ultra-lightweight and quiet — certified to fly safely over people in a busy healthcare setting.
Case Study // Confined Space Inspection Interior view of a spillway at Inniscarra Dam showing the concrete flat construction
No scaffolding required
Inniscarra Dam, Cork

Confined space inspection of hydro dam spillways

Confined space drone inspection of three spillway interiors at Inniscarra Dam for ESB — capturing 4K video and still imagery of concrete conditions unseen since the 1950s.

Challenge Inward-slanting walls impossible to scaffold Spillway interiors with inward-slanting walls and no hard points for anchoring — scaffolding and rope access were not viable.
Technology Confined space drone Cage-protected drone with 4K camera and built-in lights, operating without GPS inside the hollow spillway structures.
Case Study // Forestry Aerial view of forestry and access tracks on the Greenbelt wind farm site in Clare
Active wind farm site
Clare, Ireland

Wind Turbine Farm Forestry

Drone mapping of forestry on a mountain-side wind farm site in Clare, planned around turbine exclusion zones and delivered with a consistent point cloud and imagery record.

Location Wind farm in Clare Forestry blocks between operating turbines on a mountainside site.
Deliverable Imagery + point cloud Captured in one aerial workflow with turbine exclusion zones built into the plan.
Case Study // Roof Inspection A drone's-eye view of a housing estate roof showing defective flashing areas
~70 units inspected
Housing estate

70-unit roof flashing inspection

Engineers With Drones used a sub-250g C0 drone to inspect defective flashing across 70 housing estate units, delivering a per-unit report as a complete rectification work list.

Units inspected ~70 in one day Every unit in the estate inspected safely from the air, regardless of ground-level access constraints.
Drone type Sub-250g C0 drone Ultra-lightweight and quiet - certified to fly safely over people in a residential area.
Case Study // Coastal Survey Coastal cliff view showing the road hugging the cliffside above the sea at Mountain Stages, Kerry
Like-for-like comparison with 2018 survey
County Kerry

Survey of a Cliffside Road

Engineers With Drones captured high-resolution imagery of a 2km section of cliffside road at Mountain Stages, Kerry, replicating exact angles from a 2018 survey for a like-for-like comparison of coastal erosion and landslide activity.

Equipment Mavic 3 Pro (triple lens) Triple-lens drone with wide, medium, and zoom cameras captured both overview imagery and detailed defect close-ups from a single platform.
Deliverables High-res imagery + video 20MP+ still imagery and video of the full 2km section, organised by road section with annotated defect identifiers matching the 2018 report.
Case Study // Aerial Data Wide aerial view of the complete barrage structure and surrounding riverbanks
Full tidal cycle in one day
County Clare

Water Dam Aerial Data Collection

Engineers With Drones captured 4K video and geotagged still imagery of a tidal flood defence barrage on the hour, every hour, throughout a full 12-hour tidal cycle.

Data cadence On the hour, every hour Full 12-hour tidal cycle captured at consistent hourly intervals, enabling true like-for-like comparison.
Deliverables 4K video + geotagged imagery 4K video and geotagged still images at every hourly interval, providing a complete dataset for engineering analysis.
Case Study // Aerial Survey Aerial view of rural farmland for solar farm photogrammetric mapping
Large-area mapping
Farmland site in Ireland

Photogrammetry Mapping for Solar Farm Development

Survey-grade photogrammetric mapping of 150 hectares for solar farm site assessment, with complete topographical data, orthophotos, and terrain models.

Challenge 150-hectare pre-construction survey Large, varied farmland site requiring survey-grade data for engineering design software within a tight timeline and budget.
Technology Drone-based photogrammetry Flown at 80m with 80% overlap, capturing 2.2cm GSD orthophoto, DEM, and DSM with custom ground control boards for vegetated terrain.
Case Study // Industrial Inspection View from below looking up inside a 70-metre industrial stack
No production shutdown
Anonymous client (Ireland)

Internal Inspection of a 70-metre Industrial Stack

Confined space drone inspection of a 70-metre riveted steel stack critical to 24/7 production — internal inspection without human entry, shutdown, or cooling-down period.

Challenge Critical infrastructure that cannot stop Stack operates 24/7 — any extended shutdown would halt the entire production line. Human entry would require cooling-down, confined space permit, and standby rescue team.
Technology Elios 3 confined space drone Caged drone with simultaneous 4K video and LiDAR point cloud capture, navigating the full 70-metre height.
Case Study // Underwater Inspection Underwater ROV inspection inside an ESB hydroelectric dam
Most ESB hydroelectric sites covered
Multiple ESB sites, Ireland

ESB Hydroelectric Dam ROV Inspections

Engineers With Drones carried out an ongoing underwater ROV inspection programme across most of the ESB's hydroelectric sites — inspecting critical infrastructure without divers or dewatering.

Assets inspected Critical hydroelectric infrastructure Inlet screens, turbines, spiral casings, gates, sealing surfaces, scour drains, weirs, and valves across multiple generating stations.
Equipment Micro ROV with 4K camera Tethered micro ROV with 4K camera, high-powered lights, and 360-degree thrusters for confined-space navigation.
Case Study // Roof Inspection Aerial view of a commercial shopping estate in Co. Carlow
7 buildings, 1 day on site
Co. Carlow shopping estate

Drone Roof Inspections at a Co. Carlow Shopping Estate

Engineers With Drones inspected seven buildings at a commercial shopping estate using a sub-250g C0 class drone, completing a full condition survey in a single day while the estate stayed open.

Scope Seven buildings Each with varying roof structures, systematically surveyed with overview and detailed defect imagery captured for every roof.
Equipment Sub-250g C0 class drone Very small, very quiet drone operating legally over people. Inaudible from ground level with zero disruption to shoppers or tenants.
Case Study // Underwater Inspection Underwater ROV inspection inside a hydroelectric penstock at Golden Falls
Zero diver entry required
Golden Falls Hydroelectric Station, Co. Wicklow

ROV Penstock Inspection at Golden Falls

Engineers With Drones deployed an underwater ROV to inspect a live riveted steel penstock, expansion joint, inlet screens, and spiral casing without drain-down or diver entry.

Asset inspected 2-metre diameter penstock Internal condition of a critical hydroelectric water conveyance structure captured in high-definition video.
Inspection scope Four critical zones covered Penstock walls, expansion joint, inlet screens and gate interfaces, and the spiral casing at turbine inlet depth.
Case Study // Heritage Documentation Derelict hospital building 3D model
Zero personnel exposure to structure
Derelict building survey

Derelict Hospital Building Survey

Engineers With Drones used external 3D scanning and internal confined space drones to survey a derelict hospital building for restoration feasibility, without placing any personnel at risk.

Method Two drone systems External photogrammetric drone for 3D scanning, combined with an internal confined space drone for interior documentation.
Challenge Collapsing structure, unsafe to enter Historic hospital building surrounded by perimeter fencing and dense vegetation, deemed structurally unsafe to enter.
Case Study // Thermal Imaging Thermographic orthophoto of a large commercial roof showing water ingress as retained heat
5.2 hectares surveyed
Large commercial building

Thermal Drone Roof Inspection of a Large Commercial Building

Engineers With Drones combined drone technology, thermography and orthophotos to locate water ingress across 5.2 hectares of flat bitumen roof on a large commercial building.

Survey area 5.2 hectares Comparable in size to two or three average Irish housing estates - surveyed safely and efficiently from the air.
Data capture Three datasets RGB orthophoto, daytime thermal orthophoto, and nighttime thermal orthophoto - two sessions on the same day.
Case Study // Underwater Inspection Aerial view of Parteen Weir and the head race canal
No unsafe diver entry required
Ardnacrusha head race canal, County Clare

Parteen Weir Underwater ROV Inspection

Engineers With Drones used an ROV underwater drone to inspect anomalies in the Ardnacrusha head race canal identified by hydrological survey - historic infrastructure built in the 1920s.

Technology Freshwater ROV High-resolution underwater imagery captured using a remotely operated vehicle deployed from a boat platform.
Navigation GPS-guided anomaly targeting ROV navigated to predetermined anomaly coordinates identified by prior hydrological survey.
Case Study // Geospatial 3D model of historic causeway in Galway
4 causeways — 1 day each
West Galway

Surveying Historic Causeways in Galway

Engineers With Drones surveyed four historic stone causeways in west Galway using photogrammetry to create high-resolution 3D models and technical deliverables.

Data capture 2,000 – 4,000 images per causeway Each causeway 500–1,000m long, serving as a working road and community lifeline.
Processing ~2 weeks per site Field capture in one day per causeway; photogrammetric processing and deliverables approximately 2 weeks.
Case Study // Industrial Inspection Crane inspection 01
~2 hours on site
Cork

Derelict Port Crane Inspection, Cork

Engineers With Drones used a high-optical-zoom drone to inspect a derelict crane at a Cork port terminal ahead of decommissioning.

Location Jetty end, Cork port terminal Close to water, requiring full PPE including life jackets for all personnel on site.
Key finding Guard rails entirely absent Critical structural components found to be missing. All imagery verified on site before sign-off.
Case Study // Port Infrastructure Belview Port Inspection
Full structure underside captured in 4K
Belview Port, Waterford

Pier Infrastructure Inspection, Belview Port

Drone inspection of pier infrastructure at Belview Port — examining the underside of shore-side facilities using UAV technology to assess concrete defects and structural integrity safely.

Structure type Shore-side pier on driven piles Access coordinated with port authorities and timed around the shipping schedule.
Constraint Tidal window All fieldwork completed within the tidal window to ensure adequate flight clearance beneath the structure.
Case Study // Geospatial Agricultural land mapping with Drone LiDAR
4,500 hectares across 47 farms
Distributed across Ireland

Farm Land Mapping with Drone LiDAR

Engineers With Drones used drone-based LiDAR and multispectral sensors to map large areas of farm land across Ireland, providing detailed information about farms and their carbon sequestration potential.

Scale 4,500 hectares mapped 154 plots across 47 farms, some with sub-plots up to 30km from the home farm.
Sensors LiDAR + multispectral Both datasets captured simultaneously in a single flight, reducing site visits and turnaround time.
Case Study // Port Infrastructure Pier Inspection
386 linear metres of pier wall
Coastal harbour, Ireland

Harbour Pier Wall Drone Inspection

Engineers With Drones carried out a detailed drone inspection of a harbour pier wall, assessing hot-rolled interlocking steel sheet piles and concrete structure for defects and structural integrity.

Structure 386m concrete pier wall Hot-rolled interlocking steel sheet piles and concrete structure requiring detailed defect assessment.
Constraint Two-hour tidal window Full inspection completed within tidal constraints to capture maximum data about the structure below the waterline.
Case Study // Confined Space Water Tank Inspection
Inspection complete in 2 hours
Industrial warehouse, Ireland

Above-Ground Steel Water Tank Drone Inspection

Engineers With Drones carried out a detailed inspection of a large above-ground galvanised steel water tank used for fire suppression, using a confined space drone to access the interior.

Tank capacity 500,000 litres Galvanised steel tank with corrugated metal roof and multiple penetrations requiring both interior and exterior inspection.
Shutdown time 1 day only Full inspection completed within a single day, minimising disruption to fire suppression system availability.
Case Study // Confined Space Gas Plant Ethanol Tank Inspection
0% personnel entry required
Gas processing plant, Ireland

Confined Space Drone Inspection of a Gas Plant Ethanol Tank

Engineers With Drones used a confined space drone to inspect a large steel ethanol tank on a natural gas processing facility — eliminating the need for scaffolding or personnel entry.

Tank specification 13.5m diameter, 10m high Plate steel tank containing ethanol on a facility supplying the Bord Gais gas grid. Access via a 50cm hatch.
Traditional method replaced No scaffolding required Previously required extensive internal scaffolding brought in through the access hatch. Drone eliminated this entirely.
Case Study // Geospatial Coastal Sites Mapping
17 coastal sites across Ireland
17 coastal sites, Ireland

Coastal Sites Mapping for Cable Landfall Assessment

Engineers With Drones surveyed 17 coastal sites across Ireland using drone technology to assess their potential as landfall sites for offshore cables.

Accuracy +/- 50mm hard details Feature vectorisation and CAD drafting achieved minimum tolerance of +/- 50mm for hard details, +/- 100mm for soft.
Deliverables CAD survey drawings Site surveys, orthomosaics, and CAD drawings produced for each of the 17 candidate sites.
Case Study // Structural Inspection Living Bridge Inspection
350m bridge, 6 cable-truss spans
University of Limerick

Living Bridge Drone Inspection, Limerick

Drone inspection of a 350-metre pedestrian bridge at the University of Limerick with an intricate cable-truss design that makes thorough manual inspection difficult.

Structure 350m cable-truss footbridge Six cable-truss spans with under-slung catenary cables and tetrapod piers between each span.
Challenge Complex intricate geometry Constructed in 2007 and regularly inspected, but the design makes thorough access difficult by conventional means.
Case Study // Industrial Inspection Pharma Pipe Rack Inspection
No climbers or MEWPs required
Pharmaceutical manufacturing plant, Ireland

Pharma Plant Pipe Rack Drone Inspection

Engineers With Drones used a drone to carry out a detailed inspection of pharmaceutical plant pipe racks, providing complete coverage of upper surfaces without the need for climbers or mobile elevating work platforms.

Challenge Upper pipe rack surfaces MEWPs could only reach a limited number of pipes. Drone provided complete coverage without climbing risk.
Technology Thermal imaging payload DJI M300 with H20T thermographic camera allowing detection of hot gas leaks while maintaining a safe standoff distance.

About our case studies

The above are case study articles of client work we performed - from project requirements, to how we approached it - and what we found. Some are inspections of structures where getting close safely was the main challenge. Others are survey projects where covering a large area quickly was the priority. We also feature underwater inspection case studies, where the drone was used to get an accurate view of the asset - without any need of divers.

If you are trying to figure out whether drone technology is the right fit for something you have in mind, we hope these help. You can learn about the challenges and deliverables for each type of drone survey or inspection. If you have any questions about the case studies or want to discuss a project of your own, please get in touch.