Way back Santa Fe attempted to start a cargo service. they were moderately successful with some DC-3's and then larger and faster DC-4's. While waiting on a permit to carry general cargo they were allowed to move only what the railroad depots needed. after nearly a year of on time and a perfect safety record Santa Fe Skyway was denied the permit to become a general cargo service and sold off the airline division. there's an excellent video on YouTube if you want the complete story 





