017 The rear of an aircraft is where the fun lies . That 's because these days aircraft
are equipped with IR search and tracking syste ms and it is just not possi ble
to hide the IR signature of jet fuel being burnt at such high rate s . A ste alt h
aircraft might be invisible to the radar at long distances , but it can not
escape the IR seeker .
And the Americans haven't thought about it already . The F - 22 ' s engine nozzles are
shaped in such a way tha t not only does it reduce the chances of radar detection
but also allow mixing of cold air from the surrounding s , which cools the exhaust air .
This nozzle design is so effective tha t it reduces the IR signature by
as much as 30 - 40 .
005 THE AIRFRAME
The airframe is what provides the basic ste alt h characteristic
to both the aircraft . To apply ste alt h to an airframe , the first thing
tha t needs to be taken into account is the shape of the airframe .
A ste alt h aircraft must have as much as possi ble paralleled edge
of the airframe to reflect the radar wave away from its source .
Both the aircraft , Pak Fa as well as the F - 22 employ optimum shapes
required to keep them ste alt hy in air at least from the front .
011 But what about the sides ? Is F - 22 just as effective from the sides .
The answer to tha t may surprise some . But it is just as effective from the sides too .
Unfortunate ly the story is not so rosy for Pak Fa .
The side of the aircraft is just not what was expected from a ste alt h aircraft .
The engines are a party spoiler here and will take away all the ste alt h advantage
in an engagement . The rcs from the side may be as high as 1 square meter
from certain angles . The engines are supposed to be replaced in the future ,
but there are no plans to alt er the shape of the engine ducts . So I'd assume
this is the final shape and this is a cause of worry for us Indians .
017 The rear of an aircraft is where the fun lies . That 's because these days aircraft
are equipped with IR search and tracking syste ms and it is just not possi ble
to hide the IR signature of jet fuel being burnt at such high rate s . A ste alt h
aircraft might be invisible to the radar at long distances , but it can not
escape the IR seeker .
And the Americans have thought about it already . The F - 22 ' s engine nozzles are
shaped in such a way tha t not only does it reduce the chances of radar detection
but also allow mixing of cold air from the surrounding s , which cools the exhaust air .
This nozzle design is so effective tha t it reduces the IR signature by
as much as 30 - 40 .
022 The Russi ans unfortunate ly haven't thought about the IR signature AT ALL . The nozzles
are the same nozzles used on the AL - 31F engines . This is rather surprising
since the Pak Fa will be housing an IRST syste m , whereas F - 22 lacks the same .
The Russi ans intend to detect the F - 22 from its IR signature but they haven't
done anything AT ALL about their own IR signature .
040 Your question is valid .
Russi a does plan a 1000 of these birds , but , a huge BUT , who are
the possi ble potential customers for such aircraft ? ?
The european countries wn't go for Russi an planes , they are all i
n with the JSF . China won't be sold these planes because of
India's concerns . Pak is a no go .
1852 第四世代戦闘機 ＝ ファースト 世代 ＭＳ
F - 15C リックドム
F - 15E ドワッジ
F - 15SE ドワッジ 改
F - 14 ギャン
F / A - 18C 高機動型 ザク II （ 先行試作型 ゲルググ ）
F / A - 18E / F ゲルググ 量産型
F / A - 18 発展型 ゲルググ M
F - 16C 後期量産型 ザク II
F - 16E ザク・キャノン
F - 20 グフ 後期生産 型
タイフーン T2 GM 先行量産型
タイフーン T3A GM 後期生産 型
タイフーン T3B GM 後期生産 型 ジム・コマンド 宇宙戦仕様
第五世代戦闘機 ＝ Ｚ・ZZ ・ 逆 シャア 世代 ＭＳ
F - 22 ザク III
F - 35 ガザ C
185 第四世代戦闘機 ＝ ファースト 世代 ＭＳ
F - 15C リックドム
F - 15E ドワッジ
F - 15SE ドワッジ 改
F - 14 ギャン
F / A - 18C 高機動型 ザク II （ 先行試作型 ゲルググ ）
F / A - 18E / F ゲルググ 量産型
F / A - 18 発展型 ゲルググ M
F - 16C 後期量産型 ザク II
F - 16E ザク・キャノン
F - 20 グフ 後期生産 型
タイフーン T2 GM 先行量産型
タイフーン T3A GM 後期生産 型
タイフーン T3B GM 後期生産 型 ジム・コマンド 宇宙戦仕様
第五世代戦闘機 ＝ Ｚ・ZZ ・ 逆 シャア 世代 ＭＳ
F - 22 ザク III
F - 35 ガザ C
