Exploring the final mission of the iconic Blackbird.

Here’s what you’ll learn when you read this story: The aerospike engine—which uses air pressure to shape the downward force needed to launch a spacecraft—has been on the cusp of entering mainstream ...

Polaris will build a two-stage, horizontal take-off and fully reusable hypersonic research vehicle, featuring a linear aerospike rocket engine. German company Polaris Spaceplanes announced on Jan. 27, ...