"Offshore wind turbines operate in harsh and extreme environments such as the North Sea. As blades continue getting larger, their tip speeds can exceed 100m/s. At these speeds, any particulates in the air such as rain, dust, salt, insects, etc. can wear away the surface of a blade's leading edge, a phenomenon known as ""leading edge erosion"" (LEE). This, in turn, alters the blade's aerodynamic shape, affecting its efficiency and potentially exposing the blade to further and more serious damage, thereby reducing its working life.

Whilst the extent and nature of contributing factors to LEE are not yet fully understood, it can be said that at some point in their lifespan, all wind turbine blades will suffer from some form or degree of LEE which will need to be addressed. Maintaining blades in the offshore wind sector is an expensive and dangerous job where, typically, highly skilled rope access technicians are required to scale down the blades to carry out leading edge repairs.

Having successfully proven the concept in Phase 1 of the Innovate UK funding round, in this project, BladeBug Limited will continue its work with the Offshore Renewable Energy Catapult to develop, build and test a complete, walking robotic system designed specifically to carry out a number of these detailed inspections and repetitive repairs on the leading edges of wind turbine blades.

The ability to perform these tasks remotely will free up time of skilled rope access technicians to undertake specialist repairs or upgrades to blades that only they can do. More blades could then be inspected and treated in the same time frames, maximising the electrical output of the turbines and, as a result, increasing revenues to turbine owners as well as the environmental benefit to everyone in CO2 savings."