That power is hereby conferred on the City of Fort Worth to acquire or own by lease, purchase, donation, bequest, eminent domain or otherwise all property within or without the limits of the City of Fort Worth, that may be necessary for the purpose of establishing, maintaining and operating an airport and landing field and to fully provide for the accommodation of planes transporting United States mail and other aerial machines and to make suitable charges therefor. That the ownership, maintenance and operation by the City of Fort Worth of such an airport shall be deemed a municipal purpose and the city shall pass appropriate ordinances providing for the fees to be collected and other charges to be made in the operation of such field and port.