RocketSTEM Issue #5 - January 2014 | Page 37

The new reflective protection coating on SS2’s inner tail boom surfaces is being evaluated to help maintain vehicle skin temperatures while the rocket motor is firing. SS2’s propulsion system has been developed by Sierra Nevada Corp and is the world’s largest operational hybrid rocket motor. Although this flight saw it burn for a planned 20 seconds, the system has been successfully tested in ground firings to demonstrate performance characteristics and burn time sufficient to take the spaceship and its private astronauts to space. Commenting on the successful test flight, Sir Richard Branson said: “I couldn’t be happier to start the New Year with all the pieces visibl 䁥