Gulfstream Aerospace yesterday delivered the 400th G650/650ER, some five years after the first of the ultra-long-range twinjets entered service. The milestone aircraft was handed over to an undisclosed U.S.-based customer, the Savannah, Georgia-based aircraft manufacturer said.

“Business jet travelers the world over have long recognized the G650ER as the leading combination of speed and range in the business aviation sector,” said Gulfstream president Mark Burns. “Its achievements and accolades have only mounted since its introduction, including 100-plus city-pair speed records, the prestigious Robert J. Collier Trophy, and the title for the farthest, fastest business jet flight in history. We could not be more pleased to deliver the 400th aircraft in the G650 and G650ER fleet.”

Since entering service just five years ago, the G650 family “quickly gained recognition for its ability to connect far-flung cities at the fastest speeds,” the company said. “The G650ER offers passengers both style and comfort with the signature Gulfstream cabin experience, featuring 100 percent fresh air, the lowest cabin altitude in business aviation, quiet sound levels and 16 of the industry’s largest windows.”

The G650 can fly up to 7,000 nm/12,964 km at Mach 0.85, while the G650ER has a range of 7,500 nm/13,890 km at the same long-range cruise speed. Both aircraft have an Mmo of Mach 0.925—the current top speed for in-production civil aircraft.