Single-Stage-To-Orbit

Radian Aerospace raises seed round to fund work on spaceplane
A startup has raised a seed round of funding to pursue development of what’s long been considered the holy grail of space transportation: a single-stage-to-orbit reusable spaceplane.

BAE Takes Stake in British Air-breathing Rocket Venture
Access to BAE capital and technology will help Reaction Engines Limited accelerate development and testing of a prototype single-stage-to-orbit engine.

NASA considering X-33 engine tests as Pentagon ponders program pickup
The powerful linear aerospike engines intended for the orphaned X-33 experimental rocket could rumble to life this summer under an agreement being hammered out between NASA and the engines' manufacturer.

X-33’s death signals shift in NASA’s goals
NASA's surprise termination of the X-33 experimental rocket program signals a significant technological shift in the agency's approach to reducing the cost of launching people and payloads to orbit.

X-33 faces lengthy delays
Damage to the X-33’s two hydrogen fuel tanks could delay the program one to two years, government and industry officials told Space News. “Frankly, there was very little chance of flying in 2000 prior to the damage,” said an industry official. “This just drove a stake through that.”