Russia First to Succeed in Test of Ecologically Clean Rocket Engine
![Russia First to Succeed in Test of Ecologically Clean Rocket Engine](https://cdn4.img.sputniknews.com/images/104466/67/1044666725.jpg)
Russian scientists have successfully tested the first detonation liquid rocket engine (LRE) which uses next-generation clean fuel, according to the Foundation for Advanced Studies (FPI).