The Gulfstream G-III represents the third evolutionary leap in a lineage of exceptionally successful private jets. Conceived and crafted by Gulfstream Aerospace Corp, the G-III aimed to build upon the legacy of the GII, a model that had seen more than 250 units take to the skies. This next-generation aircraft can gracefully traverse 4,600 miles (4,000 nautical miles) at an impressive speed of 0.84 Mach while accommodating eight passengers in luxurious comfort. Alternatively, it can maintain this remarkable velocity over a range of 4,140 miles (3,600 nautical miles) when carrying twice the passenger load.

Inside the cabin, the G-III typically offers seating for fourteen to nineteen passengers, but its versatile design can be configured to hold as many as nineteen individuals in a high-density layout. The cabin’s spacious dimensions extend to 41.3 feet in length, 6.1 feet in height, and 7.3 feet in width, culminating in a generous cabin volume of 1,345 cubic feet. The well-appointed interior includes a full-sized galley complete with a refrigerator, coffee maker, and all the essential culinary equipment.

Gulfstream’s choice of two Rolls-Royce Spey Mark 511-8 engines, the same engines employed in the GII, was the result of meticulous testing that also considered three and four-engine configurations. Ultimately, the decision was made in favor of two engines, balancing performance capabilities with cost efficiency. Each of these engines can produce a substantial 11,400 pounds of thrust during takeoff, although they are flat-rated to 9,000 pounds to meet FAR Part 36 noise regulations. In the event of an engine failure, the remaining engine seamlessly surges to full power.

The G-III showcases impressive takeoff capabilities, requiring just 5,100 feet at sea level under standard conditions. Even at an altitude of 5,000 feet and a temperature of 77°F, it can gracefully ascend in 7,175 feet. Following takeoff, the G-III swiftly climbs to 43,000 feet, with a maximum certified flight ceiling reaching an astonishing 45,000 feet, even when fully loaded at its maximum takeoff weight of 68,900 pounds. While cruising at 45,000 feet, it achieves long-range speeds of 442 knots (0.84 Mach), and at 39,000 feet, it effortlessly attains high-speed cruise speeds of 488 knots (0.88 Mach).

With its tanks brimming with fuel and reserves, the G-III boasts an impressive maximum range of 5,070 miles (4,410 nautical miles). When flying at its peak cruise speed, it can soar nonstop for 3,330 miles (2,900 nautical miles). The cabin maintains a comfortable cabin pressure of 9.5 psi, ensuring a sea-level environment for passengers up to an altitude of 22,100 feet.

Beyond its exceptional performance, the G-III is a paragon of reliability, with redundancy built into critical systems. For instance, it features four boost pumps for the fuel system, though only one is required at its highest certified altitude.

The G-III’s stellar performance can be attributed in part to its innovative wing design, boasting a 10% greater wingspan than its GII predecessors, resulting in significantly enhanced range. Moreover, the addition of Whitcomb winglets helps reduce fuel consumption.

A notable redesign extended to the cockpit, which now offers three additional feet of space, accommodating a third pilot for extended journeys of up to eight hours. Pilots will also appreciate the state-of-the-art avionics system, featuring a Dual Sperry ED-800 electronic flight instrumentation system, a Sperry Primus 800 multifunctional display, and a four-screen EFIS that dominates the flight deck. Standard equipment includes three Honeywell laser gyros, a Sperry SPZ800 flight director system, Global GNS 1000 FMS, a Sperry Primus 800 color weather radar, and all necessary communication and situational awareness tools.

In summary, the Gulfstream G-III is a paragon of reliability and range in the realm of private jets. With its capacious 1,345 cubic foot cabin and high-performance capabilities, it stands as a testament to Gulfstream’s commitment to excellence, showcasing how the Gulfstream series continues to evolve and impress.