FSX – McDonnell XP-67 Updated. The McDonnell XP67 was designed in 1944 and made its first test flight the same year. Howeber, the performance proved to be far from satisfactory. When the prototype was extremely damaged by fire, the program was eventually abandoned. The package features FSX compatible gauges, smoke effects and a new basic VC. Original model by Kazunori Ito, updated for FSX by Michael Pook. This is the whole aircraft. By Michael Pook.