11. Combustion instabilities are a major concern in ground-based gas turbine engines because of NOx emissions. 12. Since the beginning of the 1960s the company have been developing bypass gas turbine engines . 13. Stanford University researchers will model gas turbine engines . 14. General Dynamics has been working on a drop-in diesel engine to replace the gas turbine engine . 15. Of the three concepts, the $ 200 million natural gas turbine engine is the most affordable. 16. It was the company's first gas turbine engine . 17. At that time it was the largest merchant freighter with gas turbine engine around the World. 18. The radial configuration was very commonly used for aircraft engines before gas turbine engines became predominant. 19. Two marine gas turbine engines provide propulsion. 20. Pyrometers may be fitted to experimental gas turbine engines to measure the surface temperature of turbine blades.
