Space environment is a field where innovation and technology are crucial, new designs and solutions have to face the never ending trade-off between the fulfilment of strict safety and reliability requirements and the reduction of weight, that leads to an increase of efficiency reducing fuel waste and thus costs, the other sore subject. This challenge leads to the continue research and development of new technologies and materials that allows the realization of lighter and more performing components. At the same time in the last years more and more attention has been put in the reduction of engines and rockets emissions against pollution caused by air transport.