The Santa Monica–based membership air-taxi service Surf Air recently placed an order to add 65 new Pilatus PC-12 NG aircraft to its fleet, which is already composed solely of the seven-seat business turboprops, with well-appointed cabins designed by BMW DesignworksUSA. The Swiss manufacturer sells the PC-12 NG for $4.65 million. The sale includes 15 firm aircraft orders, with the option to purchase 50 more—at a total value of $312 million. Since receiving FAA approval in June 2013, Surf Air has grown to 1,000 …