09 de Setembro de 2010
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SAM146: conclusive flight tests

The first campaign of flight testing for the SaM146 engine has come to a successful conclusion. The campaign brought together a Russian crew at the controls of the aircraft and French technicians for the debugging and measurements.The SaM146 flight test campaign began on December 6 last year at the LII Gromov flight testing center, based at Zhukovsky near Moscow. The objectives of these tests were to study the underwing behavior of the engine on an aircraft - here, an Ilyushin 76 supplied by LII Gromov - and obtain SaM146 flight release authorizations for the maiden flight of the Superjet 100. The principle of the testing involved replacing one of the four Ilyushin engines (fuselage side, ?position 2?) with a SaM146 engine in order to study how it behaved.At this time of the year the weather conditions were characterized by extreme cold as well as frost, which is a threat to aviation since it adds considerable weight to the aircraft and modifies the wing?s aerodynamics. Installed onboard the Ilyushin 76 was a complete test system brought in from France. ?This system offers data acquisition and on-screen display, as well as computation, data storage and transmission to the ground station for the purposes of telemetry,? explains Eric Chausson, flight tests manager for Snecma (SAFRAN Group).Twenty-nine flights took place as from December 6, for a total of 52 hours.The SaM146 testing still has some way to go, but the work carried out to date confirms the expectations of the designers. ?We are very happy with the way the engine behaves, it?s in line with our expectations,? Eric Chausson goes on to say. ?The observed power is in line with the thrust figures recorded on the ground.?

A second campaign is scheduled for this Fall at Istres (France), in order to carry out the flight certification tests. The SaM146 will have to have flown for 150 hours. Between now and then, the engine will have been taken off the aircraft and upgraded in order to get closer to the mass production version. The structure of the teams, however, will not change. It will continue to involve a Russian crew in association with French specialists. ?The Russians were impressed by the ability of the French team to make engine modifications in real time,? says Eric Chausson. This goes to show that getting people of different languages and cultures to work together on the same project was a challenge just waiting to be taken on.


Fonte: SAFRAN

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