Earlier this year Rolls-Royce said it was collaborating with the US firm Boom Aerospace on propulsion options for a Mach 2.2 airliner called Overture. Months later, Virgin Galactic revealed a delta-winged Mach 3 sub-orbital vehicle concept also powered by Rolls-Royce. The world is going supersonic, and Rolls-Royce is Johnny on the spot, stepping up its interest, and strategic partnerships. No surprise then, that the British engine builder inked a […]