The Gulfstream G400 is set to be the most affordable private jet developed by Gulfstream. A few days ago, the Gulfstream G400 took to the skies for the first time as it headed for a two-hour and 50-minute maiden journey from Savannah Hilton Head Airport (SAV). But what exactly can lovers of other wonderful aircraft developed by Gulfstream expect from the G400? Lets find out.