5 set 1970 ano - Blades on wind turbines adopted new materials like glass and carbon fibre which enabled the blades to be lighter and hence allowed for easier rotation and longer life span of the wind turbine. The carbon fibre still has a solid composition allowing protection from heat, rain and other environmental factors whilst decreasing the weight to length ratio
Adicionado na linha do tempo:
Data:
5 set 1970 ano
Agora
~ 55 years ago