Ducting for duel fan concept

A ducting system for use on a gas turbine engine having two fans (102, 104) connected to a common shaft, and includes a primary inlet duct (12) that is integral with a plurality of primary discharge ducts (14, 16, 18, 20), a plurality of secondary inlet ducts (32, 34) that are integral with a secondary discharge duct (36), each of the ducts includes a port, the ports of the secondary inlet ducts (32, 34) are located radially outward of the port of the primary inlet duct (12), and the ports of the primary discharge ducts (14, 16, 18, 20) are located radially outward of the port of the secondary discharge duct (36).