A three-engine Dassault business jet flown by a dozen air forces. Live Falcon 900 positions.
The Falcon 900 is distinctive for a reason that has largely disappeared elsewhere: it has three engines. Two are mounted on the rear fuselage in the usual way and a third sits in the base of the fin, which was Dassault's answer to over-water range rules at a time when twin-engine limits were stricter.
Air forces bought it for government travel and liaison, and France, Spain, Italy, Japan, Australia and several others still operate the type. The French Air and Space Force examples are among the most consistently visible on this feed.
Some are fitted for medical evacuation, which is a natural fit for a fast aircraft that can reach most of a continent without stopping.
Range rules. When it was designed, restrictions on how far a twin-engine aircraft could fly from an airport were tighter, and a third engine removed the limitation. Those rules have since relaxed, which is why the layout has largely died out.
France, Spain, Italy, Japan, Australia, Greece, Nigeria and others, mostly for government transport, liaison and medical evacuation.
They are the same Dassault family. The 2000 is the twin-engine derivative and the 7X and 8X are later three-engine models; each reports its own ADS-B designator.