Difference between revisions of "Tutorial: Apollo 11"

Revision as of 15:04, 27 February 2013

It's time, we will finally do the first manned landing on another celestial body. During this mission we will require both the docking and EVA know-how from the Tutorial:_Gemini_6A_and_7 mission, as well as what we learned about moon landing from Tutorial:_Luna_9.

Ship setup

For this mission we will recreate the largest and most powerful rocket ever built: The Saturn V.

Mission phases

Getting into transfer orbit

Use the first two stages to get into orbit and the third to circularize it and get into a Mün transfer orbit just like you did for Luna 9.

Reorganizing the modules

Now begins the tricky part of the mission. Just like it was done on the real Apollo missions, we placed the landing module right under the main engine of the command and service module. Before we can use the engine we need to get the LM on the other end of the CSM.

1. Make sure that the ship is perfectly still and not rotating
2. decouple the docking node between LM and CSM
3. thrust just a tiny bit forward with the RCS trusters of the CSM and stop the movement immediately with a backwards RCS trust
4. turn the CSM by exactly 180°. I recommend to do this while the RCS trusters are switched off. This is slower, but you avoid any lateral movement in case the RCS thrusters aren't exactly on the center of mass.
5. thrust forward to redock the LM at the top docking node
6. engage the stack decoupler which links the LM to the 3rd stage

Transfering the landing crew

During the real Apollo missions the crew could board the landing module through the docking hatch. Unfortunately the current version of KSP (0.18.4) doesn't allow that, so we need to do two EVAs to transfer the crew. Let the first Kerbonaut leave the command pod, fly to the door of the lander can, and enter it. Then do the same with the second Kerobonaut. The third one stays behind in the CSM to control it while in Mün orbit.

Enter Mün orbit

Get into an orbit with a height of about 20km around the Mün. Make it as circular as possible. That will make the later redocking easier.

The landing

You already completed the tricky part, now begins the insanely tricky part: the landing.

1. Undock the landing stage, press Esc, go to space center, and switch control to the lander.
2. Deploy the landing gear so you don't forget about it
3. Boost retrograde to get into a suborbital trajectory, preferably one which leads you to a landing area on the day side with a nice view of Kerbin (try to do it without ramming the service module)
4. wait until you descended to a height of 10km
5. follow the same rule you followed with the Luna probe: boost so your ground speed = your altitude / 100.
6. get down as vertical as possible. Your landing gear can withstand an impact of up to 12 m/s, but try to stay under that so you have some security tolerance.
7. let it sink to the ground
8. you can continue breathing now

Congratulations, the eagle has landed.

Now get your Kerbonaut out of your lander can, say something quotable about small steps and giant leaps, and jump to the ground.

Walking on the Mün

Start and redocking

Return to Kerbin