Difference between revisions of "Tutorial:Mun Landing"

Revision as of 04:53, 17 September 2012

This tutorial will show you how to land a Kerbal on the moon.

Step 1- Build the Rocket

The kind of rocket that can get you to the Mun and back can be very, very heavy. The ideal sequence for a Mun rocket is 3-4 stages (though more or less are certainly possible).

Let's start from the top down:

The Upper Stage (Lander) should be deployed in Munar orbit, and should be capable of traveling to the surface of the moon, back to orbit, back to Kerbin orbit, and down into Kerbin's atmosphere. Sounds like a lot, but since most of this occurs in a region with a small gravity well and no atmosphere, it doesn't require much. A couple fuel tanks, a parachute, and at least one light thruster should do it (note that landing legs, RCS, and ASAS are recommended, but not necessary).

Note: It is possible to split this into two stages, 1 for the descent, and 1 for the return home. This is only recommended for heavier, more advanced landers.

The Middle Stage (Transfer Burn) should be run from just before/during Kerbin orbit, and should end during/after Munar orbit. Depending on how effective your first stage is, this stage should not require much more fuel than the upper stage.

Note: It is also possible to incorporate this stage with the landing stage, though it is not recommended.

The Lower Stage (Launch) Should be big enough to haul everything above it into (or at least close to) orbit above Kerbin. While not required, it is recommended that this stage incorporate some detachable Solid Rocket Boosters (SRBs).

Travel light. The more you incorporate in the top stage, the more thrusters you'll have to add to the stage below, and so on and so forth.

Step 2- Launch

Same as any standard launch, presumably on a much larger scale. See Tutorial: Super-basic Orbiting for dummies.

At around 20,000m begin to tilt your craft west. We are going for a flat, stable, counterclockwise equatorial orbit (same as the Mun). Try to circularize your orbit around 150,000m.

Step 3- To the Mun

A shoddy illustration of how to reach Munar Trajectory in a single orbit.

You will want your Apoapsis to intersect the moon's orbit. If you want to reach the moon on the first swing around, wait until you see the Mun rise just above the horizon.

Hopefully if you've done this right, you will be captured by Munar gravity on the first pass. Otherwise, you could always wait until you happen to lock.

When you do, turn your craft around and retro thrust to slow down so you do not fly out. Keep the retro thrust going until you've formed a nice orbit around the Mun. Because it's gravity is substantially weaker than Kerbin, your velocity will not be very high.

Step 4- The Descent

Select your landing site along your orbital trajectory. Once you are above it, kill your horizontal velocity until the yellow marker sits at the top of the Navball.

Begin a slow, vertical descent. Do not tip your lander over.

See also

• Moon landing using mods
• Tutorials