T-28 Trojan Package for FSX. The North American Aviation T-28 Trojan is a piston-engined military trainer aircraft used by the United States Air Force and United States Navy beginning in the 1950s. Besides its use as a trainer, the T-28 was successfully employed as a Counter-insurgency (COIN) aircraft, primarily during the Vietnam War. Features comprehensive VC and model. Ex payware from Alphasim/Virtuavia.