The world’s largest aircraft had a successful engine test
 

Back in May, we reported that the world's largest aircraft, the Stratolaunch, had finally left its (giant) hanger and was preparing for tests. This week, the first of those was completed. All six of the massive rocket-launching plane's turbofan engin...

https://www.engadget.com/2017/09/20/...l-engine-test/