G450 Addendum
The 13,850-pound-thrust Tay 611-8C turbofans, though rated at the same takeoff thrust as the G400’s Tay 611-8s, provide 6 percent more thrust at 5,000 feet (ISA +15 degrees C) and 2 percent better fuel burn, giving the airplane 250-nm more range than the G400, for 4,350 nm at Mach 0.80. On a 3,000 nautical mile mission, the G450 will burn 1,300 pounds less fuel than the G400. The -8C also incorporates FADEC, a larger-diameter fan, modified high-pressure turbine and new bypass/core mixer. Maintenance intervals have been extended to 6,000 hours for midlife and 12,000 hours for full overhaul.
The GIV’s dispatch reliability rating is 99.7 percent, but Gulfstream still looked at addressing and upgrading those systems that historically required the most service attention. The company took the top 10 high-removal items on the GIV and were able to improve nine of them on the G450.
The more capable and reliable electrical power system of the G550 replaced the G400’s electrics. Two 40-kVA integrated drive generators and a 40-kVA APU generator provide improvements in electrical power capacity, no-break power transfer capability and added redundancy. A new Honeywell 36-150 APU provides improved reliability for engine starting, better performance for cabin temperature control and better high-altitude electrical power capacity. It also runs quieter than the G400’s APU.
Cabin comfort is enhanced by a dual-pack environmental control system based on the G550 air-cycle machines and a three-zone (cockpit plus two cabin zones) digital temperature control. A G550-style passive door seal and dual digital pressurization system give added redundancy and safety. Maximum cabin altitude has been reduced from 6,500 feet to 6,000 feet.
Other systems that the G450 shares with the G550 include the nose landing gear, nosewheel steering, oxygen system and fire-extinguishing system. The G450’s wing and tail are the same as those on the GIV/GIV-SP/G400.
Word on the street is that Ford would like to replace their Falcons with G350's.
Enjoy.....
GV