Gulfstream G400

History of the Gulfstream G400

The G400 is the latest addition to Gulfstream's proven line of business jets. The aircraft is designed with a focus on the large-cabin "business jet" market, with no compromise on performance and efficiency quality.

In October 2021, the Savannah, Georgia-based company introduced the genre alongside its larger cousin, the G800, which is detailed elsewhere on this site.

Externally, the G400 continues to rely on the proven physical aspects of other Gulfstream products; the fuselage is tubular and streamlined for high-speed flight, while the wing main aircraft is mounted low on either side of the mid-fuselage and swept back for high speeds flight. Additionally, each element is topped with a fuel-efficient winglet that blends elegantly into the design. The cockpit can seat two side by side before the sharp nose cone arrangement. The engine was placed at the rear of the design to reduce interior noise, and was mounted on an external short rear wing.

The fin consists of a "T-shaped" planar arrangement with a single vertical fin supporting the horizontal plane at the topmost edge of the fin. Ground travel is achieved by means of a conventional wheeled retractable tricycle undercarriage.

Inside the aircraft, the cabin/living area will be divided into three distinct areas in the entry layout: seating for up to 11 people, bedrooms for up to 4 people, a full toilet and a full kitchen. Ten cabin windows provide passengers with unparalleled views, while an air purification system purifies the cabin air every two minutes.

The cockpit features three large full-color touchscreens that display all relevant operational information on a state-of-the-art digitally controlled instrument panel to reduce crew workload and improve situational awareness at all stages of flight. The gas quadrant is located on a shared center console between the two crew members, and each pilot receives a side-mounted F-16-style flight stick.

Avionics is a symmetrical flight deck with a flight-phase intelligence system and a predicted landing performance system, the latter of which comes into play during approach.

As designed, the G400 has a maximum range of 4,835 miles (4,200 nmi) and is capable of approaching supersonic speeds of 0.90 (long-range cruise is set at around Mach 0.85). Beat the competition with nonstop flights from Sao Paulo (Brazil) to Miami (Florida) or Los Angeles (California) to Moscow (Russia).

The Bizjet will fly at an altitude of 51,000 feet.

Power is said to come from two Pratt & Whitney PW812GA non-afterburner turbofan engines designed for noise reduction, fuel economy and low emissions performance. Thrust is 13,500 lbs.

Structurally, the aircraft has a maximum takeoff weight (MTOW) of 70,000 pounds and a maximum payload of 4,050 pounds. Overall length is 86.2 feet, height is 25.3 feet, and wingspan is 86.3 feet.

Specification

Basics

Years of Service

2025

Origins

United States

Status

Under development

Program is running.

Crew

2

Production

1

Manufacturer

Gulfstream Aerospace - USA

Carrier

US (probably)

Roles

Commercial Aviation

Used in roles serving the commercial aviation market, moving passengers and cargo over long distances.

BizJet

For roles serving the business aviation market, primarily VIP and regional travel.

VIP Service

Used in the VIP (Very Important Person) passenger role, usually with above-average amenities and luxury as standard.

Notable Features

Radar Capability

Houses may house (via specialized variants) radars for searching, tracking, and attacking enemy elements.

Multi-engine

Include two or more engines to improve survivability and/or performance.

wing sweep

The main plane or leading edge has retraction lines for improved high-speed performance and handling.

High-speed performance

Can accelerate to higher speeds than the average aircraft at the time.

High performance

The ability to fly and operate at higher altitudes than the average aircraft of the day.

Extended Range Performance

Ability to travel long distances using on-board fuel supplies.

Super performance

The design covers the three key performance categories of speed, altitude and range.

Operation Lakes

Able to operate over the ocean and survive certain harsh marine environments.

Depression in crew members

Support the pressurization required for crew survival at higher operating altitudes.

Closed crew room

There are partially or fully enclosed crew work areas.

Scalable

Has retractable/retractable landing gear to maintain aerodynamic efficiency.

Dimensions and Weight

Length

86. 2 feet

(26.27m)

Width/span

86. 3 feet

(26.30m)

Height

25.3 feet

(7.70m)

Cured weight

69,997 lbs

(31,750 kg)

Main aircraft structure

monoplane/low mount/sweep

Monoplane

Designed to use a single main wing main aircraft; this is the most popular arrangement of main aircraft.

install low

The main aircraft is mounted low on the side of the fuselage.

swipe back

The floor plan features a swept wing along the leading edge of the main aircraft, promoting higher operating speeds.

(Structure descriptor refers to the production variant of the base model Gulfstream G400)

Performance

Installed:

2 Pratt & Whitney PW812GA non-afterburning turbofan engines, each producing 13,500 lbs of thrust.

Maximum speed

690 km/h

(1,110 km/h | 599 kn)

Cruising speed

652 km/h

(1,050 km/h | 567 kn)

Maximum speed difference

+60 km/h

(+60 km/h | 32 knots)

Maximum

51,001 feet

(15,545 m | 10 km)

Area

4,833 km

(7,778 km | 14,405 nautical miles)

Range (MPH) Subsonic: <614mph | Transonic: 614-921 | Supersonic: 921-3836 | Hypersonic: 3836-7673 | Hypersonic: 7673-19180 | Reentry: > 19030

Armor

None.