UK's Sabre engine gets new investment boost - Rolls-Royce and Boeing join.
http://www.bbc.co.uk/news/science-environment-43732035
"... the Sabre engine. This power plant is designed to push a vehicle from a standing start all the way to orbit in a single step. It would work like a conventional jet engine up to about Mach 5.5 (5.5 times the speed of sound) before then transitioning to a rocket mode for the rest of the ascent. "
(Maybe atmospheric operations in E D are not too far away?
)
http://www.bbc.co.uk/news/science-environment-43732035
"... the Sabre engine. This power plant is designed to push a vehicle from a standing start all the way to orbit in a single step. It would work like a conventional jet engine up to about Mach 5.5 (5.5 times the speed of sound) before then transitioning to a rocket mode for the rest of the ascent. "
(Maybe atmospheric operations in E D are not too far away?