Blade testing at WMC

WMC has developed the procedures for blade tests since 1984 and has tested many blades for many of the largest blade manufacturers ever since. Download the WMC Blade testing brochure.

Tests that are frequently performed as part of a standard full-scale wind turbine blade test programme are:

  • Blade weight and COG determination
  • Determination of natural frequencies and damping
  • Mode shape analysis
  • Static test
  • Fatigue test
  • Post fatigue static test
  • Torque test

The test facility has three blade test lanes, each with its own test rig. Currently, blades of up to 60 meters have been tested.

The strong floor is capable of taking concentrated loads up to 500 tons and is equipped with 2200 anchor points for fixation of test rigs and structures. Most of the software for the measurement and control systems is developed in house, giving flexibility in carrying out very complex testing on all kind of structures and components.

For loading structures, we have a wide variety of winches and hydraulic actuators at our disposal, such that for every job the optimum solution can be chosen. Two separate hydraulic systems, plus a modular approach for the construction of the test rig, make the picture complete and allow us to build practically every desired test setup for any kind of structure.

Rotor blades can be tested both quasi-statically and in fatigue using multi-axial and multiple-point loading.

To be able to reduce the fatigue testing time and still have full displacement and force control, the multi-axial near-resonance test has been developed. Depending on the customers' needs full resonance or quasi-static fatigue tests are performed.
Static tests on wind turbine blades can be done both horizontally and vertically.

Inspections are carried out regularly during the test programs in order to find possible structural damages at an early stage. Apart from visual inspections by our experienced team a thermal camera can be used in order to detect hidden hotspots.


You will be updated regularly on the status of your project. Final reporting is generally done according to IEC 61400-23 for compliance with certification body rules.

If a FOCUS model is available, the measurements can be compared to the model as part of the report. This may include amongst others:

  • Calculation of displacements
  • Calculation of strains
  • Natural frequency and mode shape analysis
  • Evaluation of bolt factors and bending

Measurement data can be shared throughout the project.


Currently, WMC uses witnessing procedures to deliver e.g. DNV GL, or TÜV approved reports. We are in the process of obtaining ISO 17025 accreditation.


As an independent laboratory, we understand the importance of confidentiality. Our processes comply with general requirements to avoid predisposition and maintain confidentiality. The signing of a non-disclosure agreement is typically included in the preparation of a project.


Based on customers' needs new tests are being developed constantly.
Please contact us to discuss the options for a customized blade test programme:

Knowledge Centre WMC
Kluisgat 5
1771 MV Wieringerwerf
the Netherlands
phone +31(0)227-50 49 49

Flapwise fatigue test on the EWT29 blade at Knowledge Centre WMC

static blade test 3 phases