11. F404 ) have variable inlet guide vanes to direct air onto the first fan rotor stage. 12. This means the HP turbine nozzle guide vanes would have to be different from the original. 13. In all probability, the downstream LP turbine nozzle guide vanes would have to be changed anyway. 14. The power turbine was a seven-stage ( initially 6-stage ) turbine plus inlet and outlet guide vanes . 15. The low-pressure nozzle guide vanes for the Tay engine powers Fokker 100, Gulfstream IV and re-engined Boeing 727-100s. 16. Intermeshed contra-rotating turbines can act as the guide vanes for each other, removing the need for static vanes. 17. The fan consists of 22 fan blades, 52 exit-guide vanes , and ten struts, and is driven by a gearbox. 18. If the deflection angle, e, between the guide vanes is small, the magnitude of the secondary vorticity is represented as 19. The engine had variable inlet guide vanes , as used on many other engines, necessary for accelerating from idle to high thrust. 20. Unlike some military engines, modern civil turbofans do not have any stationary inlet guide vanes in front of the fan rotor.
