680T, 680V and 680W

Model 680T (2A4)

The 680T was originally certified on September 15, 1965, per CAR. 3, at this time it was an 8500-pound aircraft identical to the 680FLP with the following exceptions: AiResearch engines model TPE-331-29A, Revised fuel system, Pressurized to 4 psi and revised air design speeds. This marked the first Commander to utilize a turbine powered engine and came to be known as the Turbo Commander. Then in 1966 the 680T was recertified with the following changes, gross weight increased to 8950 pounds, the 32-inch wingtip extension was removed, increased power takeoff power, new propellers, increased operating limits, the airframe configuration changes resulted in changes to the flight characteristics. All 8500-pound gross weight aircraft were reworked to the new configuration.

Model 680V (2A4)

The 680V was certified on June 13, 1967. The primary difference between the 680V and the 680T is the increased gross weight to 9400 pounds. The 680T with the following configuration changes define the 680V: Structural requirements due to gross weight increase, contoured radome nose, fuel flow system with totalizer, picture window, clamshell landing gear doors, fuel vent heaters and improved soundproofing.

Model 680W (2A4)

The 680W is identical to the previous Models 680T and 680V in weight, C.G. range, aerodynamic certification and engine performance. The basic difference between the 680W and 680V is the change to the TPE 33l-43BJ engine. The 680W certification was obtained on February 5, 1968.