One final attempt was made to save the Fw 191 program, this time the Fw 191C was proposed as a four engined aircraft, using either the 1,340 PS (1,322 hp, 986 kW) Jumo 211F, the 1,350 PS (1,332 hp, 993 kW) DB 601E, the 1,475 PS (1,455 hp, 1,085 kW) DB 605A or similar rated DB 628 engines. Also, the cabin would be unpressurized and the guns manually operated, with a rear step in the bottom of the deepened fuselage — in the manner of the near-ubiquitous "Bola" gondola used by the majority of German bombers for ventral defense under the nose — being provided for the gunner. Focke-Wulf used the designations Fw 391 and Fw 491 for the different variants of the Fw 191C, but these were unofficial and never allocated by the RLM.