Glf4 Aircraft - The Gulfstream IV is a low-wing aircraft with twin rear turbofans and a T-tail, here in the service of the US Department of Commerce.
The Gulfstream IV (or G-IV or GIV) and derivatives are a family of twinjet aircraft, primarily for private or business use. They were designed and built by Gulfstream Aerospace, a General Dynamics company based in Savannah, Georgia, USA, from 1985 to 2018. The aircraft is powered by two Rolls-Royce RB.183 Tay turbos.
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Upon delivery of the last G450, more than 900 GIV/GIV-SP/G450 units were produced. The last G450 was delivered on January 19, 2018 after 365 deliveries over 12 years, for a production life of 30 years, which was replaced by the G500.
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Gulfstream, in cooperation with Grumman, began work on the Gulfstream IV in March 1983 as a derivative of the redesigned, lengthened fuselage of the Gulfstream III. The first GIV entered service on September 19, 1985.
The G-IV entered service with serial number 1000 in 1987 and was upgraded to a special version GIV-SP with serial number 1214 in 1993. It was later redesignated G400 with serial number 1500.
In 2001, Gulfstream began work on an improved version of the GIV-SP, originally named the GIV-X. It was later renamed the G450. The G450 is 1 foot (0.305 m) taller than the G400 and shares the G550's advanced hull and larger cabin. Production of the G450 began in October 2004, replacing the G400. The G450 has better performance and comes with a PlaneView cockpit with four 14-inch (355 mm) liquid crystal displays and a Head up Display (HUD). The shorter G350 version of the G450 was developed and certified in 2004.
In 2018, 1990 to 1992 GIVs sold for $1.6-4.4 million, 1992 to 1999 GIVSPs were listed for $1.25-5.2 million, 15-year G300 and G400 were available for $4.5-7 million, and $4901. -23.75 million dollars.
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Compared to the Gulfstream III, the decision to redesign the wing structure to reduce weight provides an opportunity for an aerodynamic redesign of the wing to reduce speed and increase range. Changes in the contours of the wing had to be limited to the front 65% of the wing chord so that no redesign of the control surfaces was necessary. Changing the inner wing would result in a redesign of the fuselage floor structure, so this area of the wing was not changed. The outer wing modifications were aimed at reducing the maximum downforce coefficient and moving it further in an effort to reduce drag and increase sweep.
At 12,420 lbs, the Rolls-Royce Tay fanjet engine provided more thrust than the Gulfstream III's 11,400 lbs. Speed, noise level, emissions, fuel economy, range and carrying capacity have also been significantly improved from the previous model.
The Gulfstream IV wing has a weaker outer shock and more sweep that causes less drag. Other advantages from this design are lower root bding momt due to more internal pressure, lower departure speed due to washing and greater fuel volume due to increased chord. These aerodynamic improvements result in a range of over 300 nautical miles.
In addition to the wing redesign, the Gulfstream IV also became the first commercial airliner to feature a rubberized glass cockpit.
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The G400 has a large cabin, a long range of 4,350 nautical miles (8,060 km) and the same comfort and design that characterizes the G-Line. Maximum cruise altitude and speed is 45,000 feet and Mach 0.85. Earlier models were equipped with the Honeywell SPZ 8000 Avionics package. The SPZ 8400 Avionics package was optional and became standard on later models. Its used price was under $15 million in 2009.
The National Oceanic and Atmospheric Administration (NOAA) operates GIV-SP (N49RF) which is modified to fly scientists and crew members at 45,000 feet around tropical cyclones. The plane has been modified to drop instruments called "dropsondes" to measure wind speed, air pressure, humidity and temperature as they drop onto the ocean surface. By sampling the hurricane and dropping these probes along a 4,000-mile path around the storm, forecasters at NOAA's National Hurricane Center and Hurricane Research Division can better predict where the hurricane will be "headed" by upper-level winds. Wind shear is also predicted which will either increase or decrease hurricane strength. The GIV-SP is well suited for this mission because it is fast and can fly long distances with enough cargo space for crew and instruments.
In 2009, the NOAA GIV-SP was further modified by adding a side-scan Doppler radar to the rear fuselage. This radar is used to profile storm clouds.
In June 1987, a Gulfstream IV 22 set a world record in its class for flying west around the world in 45 hours. 25 min. The following year, another GIV 11 set a world record for flying east around the world.
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In 1990, Gulfstream CEO All Paulson and the Gulfstream crew set 35 international flight records around the world in the GIV.
Can be configured for cargo operation, 26 passenger operation, or a combination of the two. When the passenger seats are removed, it can be configured as three pallets without passengers or two pallets with eight passengers or one pallet with fourteen passengers. With seats full, the plane can accommodate up to twenty-six passengers and a crew of four. A hydraulically operated cargo door is installed on the starboard side of the aircraft and a ball roller cargo floor can accommodate pallet cargo. Fleet Logistics Support Squadron Four Eight (VR-48) operates the C-20G at Naval Air Facility, Andrews Air Force Base, Maryland and at VMR Detachmt Kaneohe Bay, Marine Corps Air Station Kaneohe Bay, Marine Corps Base Hawaii.
The C-20H is a GIV-SP model operated by the US Air Force in a command/command transport role. The C-20J is a GIV-SP model operated by the US Army in a command/executive transport role.
The G450 (GIV-X) is 12 inches (30 cm) longer and the main door is moved to the rear, it has updated engineering, cabin and systems.
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The G450 is the designation for the GIV-X model, approved by the FAA on August 12, 2004, along with the G350, which has a lower fuel capacity. Compared to the Gulfstream IV, its hull is 12 inches longer and the main test door is moved back. The Rolls-Royce Tay 611 engines are replaced by the 611-8C with FADECs, redesigned thrusters, nacelles and masts that increase range and payload, as well as aerodynamic improvements. Many Gulfstream V-SP upgrades were used: Honeywell advanced flight deck display, powertrain, cabin temperature and pressure controls, nose and landing gear. It also has an improved APU with flap action / stab system, redesigned main landing gear and brakes, anti-aircraft flight control system.
During the G450's production run, 365 aircraft were produced, with prices ranging from $15 million to $32 million.
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