Su-57 was formed as a 5th generation aircraft and a Russian consequence to the American F-22A Raptor. Raptors entered service in 2005 and a Russian plane a decade and a half later. Despite this, it indicates that the Russian device importantly subsides American in many respects. Its stealth properties are peculiarly challenged. The effective reflective surface of the Su-57 radar radiation is respective rows larger than those of F-22 and F-35. It is besides somewhat smaller than for generation 4 aircraft. It appears that the Russian aircraft may not even have radar radiation absorbing surfaces and its limited stealth features are mainly based on hull shape.