FSX – Boeing 2707 SST Updated. The Boeing 2707 was intended to be the first American supersonic airliner, but increasing outcry over the environmental effects, notably the sonic boom, led to its cancellation in 1971 before the two prototypes had been completed. The package features FSX compatible gauges for the 2D panel, a new basic VC and new smoke effects. Included are two textures. Original model by Kazunori Ito, updated for FSX by Michael Pook.