Light military transport aircraft IL-112V will be redesigned for turbojet engines PD-8. This is reported by RIA Novosti with reference to an informed source.
“The IL-112V design is planned to be redesigned for PD-8 jet engines. In particular, a number of changes will be made to the design of the aircraft’s wing, fuel system, other onboard systems,” the source said.
The IL-112V was designed for TV7-117ST turboprop engines. After the crash of the aircraft in August 2021 near Kubinka airfield during one of the flights in preparation for the Army Forum, work on the aircraft was effectively frozen. The main cause of the crash was said to be the inability of the onboard fire-fighting system to extinguish the fire of the right engine, because of which the fire destroyed the aileron control rods, the aircraft became uncontrollable and crashed into the forest. The cause of the fire was not officially announced.
In June at SPIEF-2023, Denis Manturov, deputy prime minister and head of the Ministry of Industry and Trade, said that the IL-112V will be modified, according to him, technological changes will affect the design of the wing and engines.
A special feature of the IL-112V is the wing, which is a caisson design, where instead of two separate consoles connected to the centre wing, a one-piece wing is designed. The two-lobed, riveted from aluminium alloys, it is attached from above to the fuselage with the help of power elements and special fasteners. Previously, such a wing design has not been used on domestic transport aircraft. This design solution was calculated to lighten the weight of the aircraft and improve its economic efficiency. The wing design uses honeycomb structures with cladding made of composite materials. The wing’s power caisson is sealed under the fuel tank.
To meet the high requirements for the take-off and landing performance of the aircraft and to modify the aerodynamic characteristics of the wing in flight, it is equipped with double-slotted flaps with fixed deflector, brake flaps, interceptors and ailerons. The maximum flap deflection angle is 40°. Ailerons with a relative spread of 30%, occupy the end parts of the wing consoles. Aileron deflection angles: up 25°, down 17°. Two-section brake flaps and one-section interceptors are located above the flaps. The maximum angle of deflection of the brake flaps is 40°. Interceptors are designed to automatically parry the roll of the aircraft in the event of failure of one of the engines during takeoff or departure on the second lap, and on the ground to reduce the length of the run. The deflection angles of the interceptors are up to 20° in aileron mode and up to 40° in brake mode.
Because of the wing’s innovativeness, VASO encountered difficulties when assembling and mounting it on the fuselage. The IL-112B wing has a wingspan of 27.6 metres. In October 2016, VASO specialists stated that the manufacture of such panels (20 metres each) is very difficult for the company and suggested changing the design of the wing to simplify the technology of its manufacture. However, Ilyushin designers refused to do so, noting that it is impossible to redesign the wing.
The IL-112V light military transport aircraft is designed to transport and airdrop personnel, weapons, light military equipment and other cargoes with a maximum weight of 5 tonnes. The IL-112V is to replace the retiring AN-26 fleet. The IL-112V with turboprop engines has a cruising speed of 470 kilometres per hour and a range of 1,200 kilometres with maximum load.
