N18TD

The airframe bearing tail number N18TD is a Gulfstream G-IV built in 1990, serial number 1145. This specific aircraft is registered in the United States and is owned by VALIAIR LC TRUSTEE, an LLC based in Casper, WY, US. The combination of its build year and serial places it within the early G-IV production run, and its current U.S. registration ties operational oversight and maintenance compliance to American regulatory standards. Ownership by a trustee LLC in Casper, Wyoming suggests that the aircraft is held for corporate or trust purposes rather than individual private registration.

The cabin of this Gulfstream G-IV is configured to accommodate 22 seats, enabling high-capacity executive or charter missions compared with typical long-range business jets. With a maximum operating ceiling of 45,000 ft and a cruise speed around 459 kts, the aircraft is suitable for transcontinental and some intercontinental point-to-point routing within its 4,200 nm range. Powered by twin Rolls-Royce Tay 611-8 engines, each rated at 13,850 lbf, maintenance planning will center on Tay-series engine support cycles and associated time-between-overhaul considerations typical for late-model 1990s turbofan installations. Based in the United States under a Casper, Wyoming owner, regulatory inspections, maintenance tracking, and line support will follow U.S. Federal Aviation Administration oversight.

The Gulfstream G-IV family occupies a niche for long-range, high-capacity business aviation in the late 20th century, balancing speed, range, and cabin volume. Competitors in its class typically include other large-cabin long-range business jets with similar transcontinental capabilities. For a 1990-built airframe with the described specifications, buyer and charter demand depends on airframe condition, avionics fitment upgrades, and the maintenance status of the twin Rolls-Royce Tay 611-8 engines. Resale and operational considerations center on completion condition, required avionics modernization to current standards, and the lifecycle costs associated with supporting Tay-series powerplants.