20. 11. 2018 Behind the scenes: How engines are tested Original 1920px For acoustic and safety reasons, each test engine is separated from operators by a “bulletproof” glass panel. Additional info Original 1920px Original 1920px File type: JPGFile size: 8 MBDimensions: 6669 × 4386 pxPublished: 20. 11. 2018 Related article: 360° Tour: How Engines Are Tested Tags 2018 Engine Innovations Mladá Boleslav Technology