TY - SER AU - Sayer, F. [and. others] TI - Influence of loads and environmental conditions on material properties over the service life of rotor blades KW - WIND ENERGY KW - ENVIRONMENTAL CONDITIONS KW - MATERIAL PROPERTIES KW - ROTOR BLADES KW - DEBRA N1 - This paper presents investigations on the DEBRA-25 wind turbine blades from 1984. The weather condition and the loading of the blade are discussed and compared to modern wind turbine blades. The results of a detailed visual inspection of the blades are described ER -