Drone cleaning vs rope access
The full comparison between the two methods, including what the drone does not solve. If you want an answer where the drone wins on everything, this page will disappoint you.
Rope access has handled wind maintenance at height for decades and it works. The question is not whether it is valid, but what it costs to do it that way today when there is an alternative that removes physical access from the equation.
Where the drone wins, plainly
On downtime, which is where the real money sits. One day per machine against four or five is a change of category, not a marginal improvement.
And on safety exposure, which is not mitigated but removed. There is no work at height plan to review because there is no work at height. For a site with a policy of reducing work at height, that is what decides it.
Where it does not
The drone needs aviation authorisation, and that adds around three weeks of activation from confirmed order. A rope team can be on site sooner if the operator is already prequalified and available. If you need it done this week, the traditional method may start faster.
The drone also does not do everything. It is exterior cleaning and visual inspection. Any job requiring physical contact, surface repair or access inside the nacelle still needs a person up there.
And there is a physical limit: we work on nacelles up to 100 metres. Above that height, today, we are not the answer.
What does not change either way
The machine has to be stopped and held in maintenance position during the intervention, with yaw and pitch controlled by the site. That is the same with ropes as with a drone.
And wind decides in both cases. A drone operation depends on a weather window exactly as an abseil does. The date is confirmed the week before, either way.
How to decide
If the job is cleaning or visual inspection, the machine sits below one hundred metres of nacelle height and you have three weeks of planning margin, the drone comes out ahead on time, cost and safety.
If you need surface repair, nacelle access or a start tomorrow, call a rope access team. We will tell you so ourselves.
- Duration
- 1 working day per turbine
- Personnel at height
- None
- Minimum order
- 4 turbines per campaign
- Activation from order
- ~3 weeks
- Maximum nacelle height
- 100 m
- Aviation permits and liability cover
- Included
- Deliverable
- Before and after photographic evidence, per machine
Summary: the two methods side by side
| Rope access | Drone from the ground | |
|---|---|---|
| Time per turbine | 4-5 days | 1 working day |
| Production downtime | Days | Hours |
| Personnel at height | Yes | None |
| Access to the machine | Abseiling with ropes | Not applicable |
| Machine in maintenance position | Yes | Yes |
| Weather window dependency | Yes | Yes |
| Aviation permit | No | Yes, handled by Eolinet |
| Activation lead time | Contractor dependent | ~3 weeks |
| Photographic evidence per machine | Contractor dependent | Included |
Frequently asked questions
Is drone cleaning as good as manual cleaning?
For exterior cleaning of blades, tower and nacelle, the result is what the before and after photographs of each machine show. What the drone does not do is contact work: surface repair or intervention on components.
Which is faster to get started?
An already prequalified rope team can be on site sooner. The drone needs around 3 weeks of aviation filing from confirmed order. After that, the drone is far faster in execution: one day per machine against four or five.
Can the two methods be combined?
Yes, and it makes sense: the drone for cleaning and inspecting the whole fleet, and rope access only on the machines where the inspection finds something that needs physical contact.
Tell us about your site and we will send you a quote
Three data points are enough: number of turbines, location and rotor diameter. We come back with a fixed price per machine and scope within two working days.