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有人问 ▼ 飞机型号为737-800W.1 这里的W.1代表什么意思？ 有人说，应该是表示翼尖小翼 W”=Winglets 如是马上有人想到 尾缀W.1的飞机是这样 ▼ 尾缀W.2的飞机是这样 ▼ 这样说当然是不对的~ 其实手册里有提及 AMM TASK 34-61-00-730-801 Flight Management Computer System - System Test *[1] The W.x indicates winglets are installed, and a one or two position tail skid (x=1 or 2) is also installed. 737-800W.X： W 确实指的是安装了翼尖小翼，而 1/2 代表的其实是装的是单位置尾橇还是双位置尾橇。 737-800飞机都有尾橇，比如下图是一架普通有小翼的737-800飞机，就没有尾缀1。 其实，737-800W.1另外还代表这是一架短跑道构型的飞机，合起来表示这是一架安装单位置尾橇的拥有短跑道起降性能的737-800飞机。如果737-800W.2，就表示这是一架安装双位置尾橇的拥有短跑道起降性能的737-800飞机。* *下一篇我们将单独介绍“双位尾撬” 有一天，接到一个电话：快帮帮我，碰到一个非常棘手的问题了。 我问什么问题。 他说，我们有两架737-800 飞机，机组反映襟翼要到25°缝翼才能完全伸出。 我问，你们的737-800飞机是短跑道构型的吗？ 他说是。 我说这不对的嘛，短跑道构型的飞机就这样啊，在襟翼25°之前，缝翼是不开缝的，为了增大升力啊，要不怎么缩短起飞滑跑距离呢？ 下面简单介绍下SFP（Short Field Performance，短跑道性能） 主要有四大基础改变：
增大扰流板地面升起角度 Speedbrakes：increasing spoiler deflection on the ground The travel of the Flight Spoilers and the Inboard Ground Spoilers will be increased such that they will travel to an equivalent of 60 degrees on the ground.Currently, the Flight Spoiler deploys to approximately 30 degrees on the ground,while the Inboard Ground Spoiler deploys to approximately 52 degrees on the ground (see Figure 1). 在地面，飞行扰流板升起角度从普通737NG的38°增大到60°，内侧地面扰流板从52°增大到60°。
襟翼40°时开缝 Krueger flap seal door：Unsealing the Krueger flap during approach and landing The addition of an actuated Krueger flap seal door will reduce landing distances by improving stall lift characteristics and thus reducing approach speeds. The seal door will be actuated to open the gap between the flap and the engine cowl when the trailing edge flaps are in the Flaps 40 position. The seal door will remain closed at all other flap settings due to the increased drag from this configuration (see Figure 2). 襟翼40°时，前缘襟翼开缝，改变构型防止失速
襟翼25°前不开缝 Sealed leading edge slats：sealing the slats for flaps 10, 15, & 25 The leading edge (LE) slats will be rescheduled so the slats remain in the sealed (intermediate) position for all takeoff flap settings (Flaps 1 through 25). The LE slats will transition to the Full Extend position for landing flap settings 30 and 40.The trailing edge (TE) flap system will be revised to include flap load relief for flap detents 10, 15, 25, 30, and 40. This enhancement is included in both Short Field Performance options, but is available on 737-800 and -900 airplanes only (see Figure 3). 在襟翼1~25°之间，前缘缝翼在不开缝的半伸出状态，直到襟翼30°前缘缝翼才会完全伸出。
着陆时多伸出5英寸 Two position tail skid：providing a 2-position tailskid The final component, available only with option 0222C472A10 on 737-800 and -900 airplanes, is a new two position tail skid (see figure 4). The existing tail skid protects the aft fuselage from the damaging effects of tail strikes if over-rotation occurs during takeoffs. This new tail skid, which extends an additional 5 inches (approximate), will provide protection during landing. It will allow for higher angles of attack during approach, with a subsequent reduction in approach speeds and reduced landing distances.
除了这些基础改变以外，还可能包括这样一些改进 ▼
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