Sukhoi Superjet 100 undergoes additional hot soak trailsMoscow - On August 4, 2011 the Sukhoi Superjet 100 flight prototype SN95005 landed at Ras al-Khaimah (UAE) to undergo hot soak trails (above +40oC). The tests will last for about one month. The aircraft is equipped with special detecting devices to register the aircraft temperature in different zones. The test program includes extensive ground testing of the engines, APU and avionics and check flights.
Ground hot soak trials are aimed at proving the ability of the aircraft, its systems and avionics to resist against temperature shock. These tests shall confirm reliable starting and operation of the APU and engines at high outside air temperature even after long parking. In order to demonstrate their proper condition the airframe made of composite materials will go through the special checks.
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Check flights are aimed at confirming of declared takeoff and landing aircraft performances as well as stable engines operation on steady and variable modes of operation. The test program also includes the performance of the continued takeoff, single-engine go-around, and relight in flight.
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Source : Sukhoi