The first prototype of the SJ-100 aircraft (tail number 97021, serial number 97001) has completed another test flight, during which the performance of the automatic flight control system (AFCS) was assessed. This was announced by the UAC (United Aircraft Corporation) press office.
The flight lasted 4 hours and 10 minutes, and the main autopilot modes were checked: climb, level flight, descent, turns to a set heading and vertical speed, the UAC stated.
The trials were conducted at altitudes of up to 12,200 metres and within a speed range from the minimum permissible up to 310 knots (approx. 575 km/h) and a Mach number of 0.81 (approx. 1,000 km/h). The flight crew rated the flight results as positive and reported readiness for certification testing of the automatic flight control system.
On 23 April, the third prototype aircraft, 97023 (serial number 97003), joined the SJ-100 flight test programme. In June, it will be redeployed to Zhukovsky to undergo certification testing of the PD-8 engine. The second prototype aircraft, 97012 (serial number 95157), has completed nine flights since March to check the performance of the PD-8 engine as part of the aircraft, the characteristics of the cruise propulsion unit, and related parameters.
The tasks for the certification testing of the first prototype aircraft include assessing the operation of the onboard avionics and navigation equipment, as well as checking other domestically-produced systems, including life support. Aircraft equipped with PD-8 engines will be used for comprehensive testing of the systems and engine in various flight regimes. In addition to the flight programme, an extensive ground test programme is planned for aircraft 97023 in Zhukovsky, including testing for resistance to high-intensity radiated fields (HIRF).
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