clestudentpilot
Well-Known Member
Does anyone know what is special about the weight 12,500 lbs? I know that that is the key figure for type ratings, and I know in ATC that that is a key weight in aircraft categories, but where did that weight come from? What is special about that weight, does it relate to the maximum certified takeoff weight of some aircraft, and the FAA just used it as the weight point for type ratings? On a related note, does anyone know how the weights 41,000 lbs., and 255,000 lbs. were determined for large and heavy aircraft? Thanks in advance for your replies