Difference between revisions of "Tutorial: How to Get into Orbit/zh-cn"

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3. 按 t 键打开 SAS 功能。
 
3. 按 t 键打开 SAS 功能。
  
===Step 2 - The Launch===
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===阶段 2 - 发射===
Say your countdown if you wish, and hit spacebar to launch into...well, space...without the bar (you'll make a space station with a bar at this end of the galaxy later).
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你可以来一段自己的倒计时,然后按空格键发射升空。
  
 
===Step 3 - Get up to 10,000 meters===
 
===Step 3 - Get up to 10,000 meters===

Revision as of 07:24, 13 June 2013

如何进入环绕轨道

进入环绕 Kerbin 飞行的轨道其实很简单,但它还是需要一定的基础知识和准备工作。我们常常把太空定义为 Kerbin 行星表面 70,000 米高度以上的空间。停留在此高度之上并完成一次完整的环绕飞行,那么你就成功的进入了轨道。

进入轨道的整个过程包括以下几个简单的步骤:

  1. 垂直发射上升至 10km 高度;
  2. 将飞行器的前倾角调整为向东 45° 倾斜,发动机持续推进,直到轨道远点高度达到 70 km 以上;
  3. 在抵达轨道远点之前,将前倾角调整至水平状态;
  4. 在轨道远点,执行发动机点火推进,直到轨道近点高度也调整至 70 km 以上;

说明

  • 持续时间: 15-20 分钟
  • 难度: 高于亚轨道飞行任务,低于建造太空站任务
  • 需要技能: 跟着感觉走就可以
  • 对应的游戏版本: 全部(已于 0.20.2 测试)

阶段

阶段 0 - 火箭的设计

最好采用至少由两级组成的液体燃料火箭。太少了的话,你只能进入亚轨道飞行;而过于笨重复杂的火箭华而不实,最多也就是多吸引点眼球而已。

就目前游戏(0.2)中的组件,最便宜的设计方案是:

为提高趣味性,火箭的第一级发动机选用的是 LVT-30 型,它没有推力矢量功能,因此需要你在飞行时时刻注意导航球的变化并用 WASD 键进行实时的调整目标方向。默认的任务载荷可以提供足够的 SAS 控制能力。

请注意设置正确的火箭分级方式,否则你就会再度在飞行失败列表里加上一项了。

Renzh (talk) 23:04, 12 June 2013 (CDT) SAS 似乎需要消耗电力,应增加电池组提供能源。建议加入 Z-400。

阶段 1 - 发射准备

准备发射。

1. 按 m 键打开地图模式,从太空视角观察矗立在发射场的火箭,调整视角至从北方观察的模式。这样你才能在进行重力转弯时观察到轨道远点的位置,并掌握关机的准确时刻,以及准备发动机点火进行轨道机动的时间。

2. 按住 Shift 把推力调整到最大。

3. 按 t 键打开 SAS 功能。

阶段 2 - 发射

你可以来一段自己的倒计时,然后按空格键发射升空。

Step 3 - Get up to 10,000 meters

Keep your rocket pointed straight up (use your navball to keep your dot on the top dot on the blue part of the navball) until you hit around 9,900 meters. Your first engine should cut out before this, just jettison it with the spacebar and burn your final engine. Thottle your second engine down to 2/3rds power since the atmosphere is weaker here and won't slow you down as much, and you will save precious fuel.

Step 4 - Gravity Turn 45 degrees East until 70km Apoapsis

Now for the fun part. Assuming you are pointing straight up, hit the d key to turn your ship using your navball until your dot is able to slide left and right on the 90 degree east line. Then tip on that line down toward the ground until you hit the 45 degree east mark. Hit your t key for SAS to help you keep it there, but don't rely on it. You will need to make course corrections until you get past 70km and enter space. At this point you should be going into space at a 45 degree angle from the ground, and in an easterly direction. Doing so will gain you speed and not waste the fuel you will need to get into orbit.

Step 5 - Get Your Apoapsis above 70km

While climbing up to 70km or 70,000 meters, it's now time to switch to your map view and control your ship from there entirely. Hopefully your navball is toggled on, else click on the collapsed tab at the bottom of the map view.

You will need to keep burning your fuel until you see your apoapsis marker reach 70km. You can see how high it is by hovering your mouse over it. Once it hits 70km (I usually shoot for 75km to buy me some head room) your craft will be able to coast up to it without any further fuel. Feel free to cut your engines with the x key and save some fuel for your orbital burn.

Step 6 - Orient for On-Orbit Burn

As you approach apoapsis (preferably before 30 seconds prior) orient your ship to the 0 degree latitudinal mark, heading east. Again, you should be in your map view when you start your burn. Hit tab to center your view on Kerban and zoom out so you can see your orbit as it forms.

Step 7 - Burn into Orbit

Once you are 10-30 seconds away from your apoapsis, begin your on-orbit burn using the Shift key to throttle up. Full throttle is best at lower altitude apoapsises since you don't want to burn past apoapsis lest you waste precious return fuel if that's your intent. If you aren't concerned, go full throttle baby at any point near apoapsis and claim a stake with the stars. You only need to burn your fuel long enough until you see a periapsis marker appear on the other side of the orbit from the apoapsis, and you see a full orbit circle, then cut your engine with the x key. Congrats, you made it into orbit. It's usually a good idea to keep burning your fuel until your new periapsis marker is above 70km. If it's below, then your orbit will cause your craft to aerobrake, eventually returning to Korban. If your periapsis is ever above 70km, congrats, you will orbit Kerban forever. If you have a manned flight, and fuel is low, then only burn until your periap is below 70km to ensure a safe return to Korban.

Finishing word

After orbiting for a while, depending on your fuel (with this design you won't have much if any at all) you can orient for a deorbit burn by burning backwards in the direction of your travel, once you are at your apoapsis point for maximum efficiency lest you be stuck in space with a manned crew forever.