News Staff February 8, 2019

Richard Branson joined Virgin Galactic and The Spaceship Company (TSC) staff and guests today at the Smithsonian’s National Air and Space Museum in Washington DC, to announce that the hybrid rocket motor which powered SpaceShipTwo, VSS Unity, to space for the first time on December 13th last year, has been donated to the museum. The rocket motor was unveiled during the ceremony and will be exhibited in the museum’s planned, new commercial space flight gallery to be called ‘Future of Spaceflight.’

Designed and built by TSC, Virgin Galactic’s sister manufacturing organisation, the motor has been confirmed by Guinness World Records as the Most powerful hybrid rocket to be used in manned flight – a title which will be shared by both companies.

“The SpaceShipTwo rocket motor is a fitting addition to the National Air and Space Museum’s collection,” said Ellen Stofan, John and Adrienne Mars Director of the National Air and Space Museum. “It does not just represent technical achievement. It is sure to also inspire our visitors by demonstrating what can be achieved through entrepreneurial innovation.”

Weighing in at approximately 3,000 pounds, with 320kN of thrust and a burn duration of around 60 seconds, the motor created sufficient energy to propel VSS Unity to space at almost three times the speed of sound.

TSC, based in Mojave, CA, will be supplying Virgin Galactic with all rocket motors required to meet its test and commercial flight requirements, both for VSS Unity and for the SpaceShipTwo fleet which will follow – those vehicles also built by TSC for Virgin Galactic.

The donated rocket motor, or more accurately, the Case-Throat-Nozzle (CTN) assembly, is an integral part of SpaceShipTwo’s hybrid propulsion system – a design which seeks to combine the simplicity of a solid rocket motor with the controllability of a liquid engine – meaning SpaceShipTwo’s rocket motor can be shut down quickly and safely at any point during flight. The hybrid propulsion system has very few moving parts, resulting in a simple, robust design for human spaceflight application.

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