FSX – Beechcraft T-34 Mentor This is Alphasim’s freeware release of the T34 Mentor upgraded to FSX. The T-34 Mentor began as a private venture designed by Walter Beech shortly after WW II. Beech felt that there was a market for a military trainer based on the Model 35 Bonanza which had been flying for about a year. The first two prototypes were powered by 205 hp Continental engines while the third had a more powerful 225 horsepower engine. The prototype made its first flight Dec. 2, 1948. This aircraft.mdl has updated 2D and 3D panel, flight dynamics and gauges. It can be flown in FS2004 and FSX Acceleration. Upgrade by A.F. Scrub.