In order to preservetheir stealthiness and keep the RCS (Radar Cross Section) as low as possible,radar-evading planes rely on weapons bay: bombs and missiles to be fired arekept inside the bays until it’s time to use them.

為了保證隱身性能和儘可能小的RCS（雷達反射截面），隱形飛機主要是依賴彈艙：炸彈和導彈在發射前就放置在彈艙之內直到使用時才伸出倉外。

For instance, theF-35 can carry one AIM-120D (AIM-120C8), on a trapeze : when needed, the BVR(Beyond Visual Range) missile is lowered into the airstream on the open bombbay door, and ejected.

舉個例子，F-35能在在懸掛架上裝載一枚AIM-120D(AIM-120CB)超視距導彈，在需要時，將導彈下降至彈艙外，然後發射。

F-22 Raptors usecanted trapeze to put the AIM-9 Sidewinder seeked into the airstream to achievea lock on the target as the side bay doors are open.
Once the missile isfired, the bay doors close up.

F-22猛禽戰鬥機使用傾斜式懸掛架裝載AIM-9響尾蛇導彈，該導彈在發射時是從側彈艙中伸出、鎖定目標並發射。
一旦導彈成功發射，彈艙門就會關閉。

Obviously, suchmethod requires the stealth plane to fly with the open bay doors for a certainamount of time, a condition that can limit the aircraft performance,maneuverability, and increases the overall plane’s RCS, with a temporaryexposure of the aircraft to the enemy radars.
Something that can bequite lethal in a Within Visual Range scenario.

很顯然，這種導彈發射方法需要在一定時間內使彈艙門保持打開狀態，從而在一定程度上限制飛機的性能、可操作性，而且會增加整個飛機的雷達反射面積，使飛機暫時暴露在敵軍雷達之中。
這種情況在視距內將會是致命的。

The problem is to bepartly solved with the use of missiles featuring the Lock On After Launchcapability. With this kind of missile (available on the Raptor when the AIM-9Mwill be replaced by the AIM-9X Block II) the bay doors remain open just thetime it is needed to eject the missile into the airstream.

這個問題可使用一種具有發射後鎖定能力的導彈解決一部分。這種導彈（當AIM-9M導彈被替換為AIM-9X Block II導彈後可用於猛禽戰鬥機）僅僅在導彈需要發射時才打開彈艙門。

However, China mighthave found a clever solution to the problem, as the latest images of the J-20Mighty Dragon stealth fighter jet, emerging from the Chinese Internet, seem tosuggest.

然後，根據在中國互聯網上獲得的殲20威龍戰鬥機的最新圖像可以看出，中國可能已經找到了一個更聰明的解決方案。

Indeed, the secondprototype of the aircraft features a missile deployment device on the sideweapons bay which extracts the selected air-to-air missile and then closes thedoor to keep the reduced RCS.

事實上，這個第二代原型機在側彈艙具有一個導彈部署設備，能夠抽出選擇好的空對空導彈然後關上彈艙門以減小雷達反射截面。

Simpler and probablycheaper than the use of LOAL missiles, the J-20′s deployment device shows thatChinese engineers are not simply copying U.S. tech: if not improving it, theyare at least troubleshooting some of the issues already faced by their Americancounterparts, with some clever ideas.

比使用發射後鎖定型導彈更簡單、很有可能更便宜，殲20的導彈部署設備表明中國工程師們不是只會簡單地山寨美國技術。如果不去動手改善這些技術，他們至少會用一些聰明的點子來診斷一些已經擺在美國同行面前的問題。

The missile launchrail was used to carry the PL-10 IR air-to-air missile during tests.

在測試中，該導彈發射架用於裝載PL-10IR空對空導彈。