Several external provisions for handling various payloads were present, such as the carriable of supply containers upon twin racks installed under the centre fuselage. To enable gliders to be towed, the rear fuselage featured a pyramid-shaped structure that was used for the anchoring point and release mechanism alike. For extended range operations, optional flexible bag-like tanks could be installed. To accommodate higher weight payloads that had been anticipated in the Viking's operations and to better withstand rougher landings, the undercarriage was reinforced considerably.