Gulfstream Aerospace is planning to deliver the first completed G650 business jets to customers shortly with the Sept. 7 receipt of the long-awaited full type certification (TC). The certification of the 650 – Gulfstream’s largest, fastest and most expensive aircraft to date – comes on the heels of receiving the full type certification for its super midsize G280 late last month.

Gulfstream received provisional type certification in November 2011 for the G650 and delivered the first 12 green aircraft by the end of that year, fulfilling a promise the aircraft manufacturer had made to customers and the financial community. Another two dozen were expected to be delivered this year.

Gulfstream says the first aircraft should enter service before year’s end, but actually may come much sooner since a number of G650s have long been in completion.

The 650 is anticipated as the first of a family of aircraft, with the next evolution – possibly a truncated version – well in the works and poised to be announced next year.

Gulfstream in recent months has applied for trademarks on a wide range of aircraft designations, from the G180 on up to the G890.

Gulfstream is hoping its newly certified G280, meanwhile, will re-energize the sagging super midsize market with new performance parameters, including intercontinental capability.

The company last week announced that it had achieved full U.S. FAA and Civil Aviation Authority of Israel (CAAI) certification for the G280 (the certification was awarded the week prior). Delivery to the first customers is expected to begin before year’s end, and the initial aircraft are in completion. While Gulfstream hasn’t provided specifics on delivery plans, the company expects to deliver 10-15 mid-cabin aircraft this year, with the G280 accounting for the majority of those deliveries.