Gulfstream is on its way to establishing an in-house record of sorts. The Savannah, Ga. OEM expects to exceed 2,000 flight-test hours this year, nearly four times the 542 hours logged in 2001 for early testing of the G550. The company said that this year a fleet of up to 12 aircraft has already passed the 1,600-hour mark conducting flight tests for four Gulfstream models–the G550/G500 and the G450/350–being developed simultaneously. This is the first time the company is co-developing multiple aircraft models.