KPBS landing on atmosphereless celestial bodies.

[Dr. SpaceFreak]

I've been trying to land these structures in atmosphereless celestial bodies like Mun or Minmus, so there is no posible airbreaking or parachutes. I always made it vertical powered by trusters, but It's kind of unstethic method, even when the gravity it's relativetly lower. So, what would you good people recommend me for landing these bases horizontally?

[Zeiss Ikon]

If there's no atmosphere, there are really only two options: thrust of some kind, or crush structures (i.e. lithobraking).  A potential third option is wheeled landing on a careful chosen slope, but this requires exceptional precision, to hit the slope just right,  as well as a suitably smooth run-out area and wheels that can take near-orbital rolling velocity (not likely for bodies larger than Minmus).

Similarly, lithobraking requires high precision control of velocity, along with prior testing, to ensure that the parts intended to explode do so, and those intended to remain don't explode.

Thrust landing is by far the most popular method of landing without atmosphere, because it works well and is more forgiving than the alternatives.  If you find the presence of engines an eyesore after landing your base assemblies, you could build the thrust systems in a form that can be undocked and flown away after landing -- like the skycrane landers used for the last couple Mars rovers, or like more conventional landing craft with docking ports on the sides so they can connect to your base unit, then just undock and launch back to orbit for reuse.

[Gargamel]

There is also the land, tip, pucker, and pray method.

During descent:

After landing, tilting, and puckering, and praying:

Note how the gear on the engine stage is missing from one side, and the dorsal legs are lower than the lateral ones.  This guides the base down upright.   RCS thrusters or Engines mounted in the nose can help slow the tilt.

If I wanted to land this Horizontally, I would put radial decouplers on each cuppola, and an engine on that.  I would adjust the thrust limiters so the CoT was directly through the CoM, and add an upward facing probe core on the bottom.  Then I'd just ditch the engines when I was landed. 

[Dr. SpaceFreak]

Just now, Gargamel said:

There is also the land, tip, pucker, and pray method.

That's the same method I'm using. But with KPBS mod it's a little tricky: Engines for horizontal landing don't fit very well in the vessel (KPBS bases), and the final result is weird, so there is no possible sthetic method for landing horizontally with thrusters in KPBS?

[Zeiss Ikon]

If you have docking ports on the portion that'll be landed, you can have engine modules (ideally with either probe cores or command pods, plus tanks, and whatever else is needed to get them attached and aligned) that dock on, symmetrically around or with thrust limiters adjusted to balance everything, and land the whole mess already horizontal, then undock and fly away the engine modules.  That's really the only practical method aside from "land, tip, pucker and pray," that won't require permanently mounting thrusters/engines and tanks, and possibly reaction wheels, to your station.  The engine modules (tugs) can be reusable, of course, if they have enough dV left after landing to get back to orbit (or to hop to a fuel depot/mining station).

For modules the size of the one in the above illustrations, this is a very practical method.  Of course, everything that's going to be attached together in a single group needs to be combined for landing, unless you have some means of moving the modules around on the ground at the destination.