SSJ‑100 short-haul aircraft modernization program and further implementation of new technical solutions in SJ‑100 is a priority for contemporary Russian civil aircraft engineering.

TsAGI (a part of NRC “Zhukovsky Institute”) is actively involved in import substitution activities of the new aircraft’s main units and systems, under the contract with Yakovlev PJSC (a part of Rostec’s United Aircraft Corporation).

TsAGI has completed large-scale cycle of tests of SJ‑100 short-haul aircraft model with PD‑8 Russian engines, finished with tests in TsAGI transonic wind tunnel.

The tests were carried out both at takeoff and landing and within wide range of Mach cruise numbers. The tests aimed at updating aerodynamic databank related to takeoff and landing with the nacelles of the new PD‑8 domestic engine, which will substitute the previously-installed foreign SaM146.

Aircraft model performance was also determined with modified high-lift devices, the slats and the flap, whose efficiency was compared to the basic configuration.

Importantly, unfavorable interference was studied in wing/pylon/nacelle joint area. In its studies, TsAGI used silk streamers to visualize flow. The results showed that there are no such undesirable aerodynamic effects in the PD-8 nacelle installation area.

‘The tests completed the wide range of studies of SJ‑100 aerodynamic performance with the new engine. During the year, the tests were conducted in TsAGI subsonic and transonic wind tunnels. The design bureau uses the data obtained to prepare for flight tests of the aircraft with the new engine,’ said Cand. Sc. Ivan Chernyshev, Deputy Head for Aircraft Aerodynamics, TsAGI.