How to Achieve Precise Landing on Tylo for Resource Extraction in Ksp

Why Tylo Demands Pinpoint Accuracy

Landing precisely on Tylo, Jool's largest moon, is one of Kerbal Space Program's most demanding challenges. With a surface gravity of 2.74 m/s²—about 28% of Kerbin's—and an extremely thin atmosphere that renders parachutes and aerobraking useless, every landing is a powered, fuel-intensive affair. Resource extraction adds another layer of difficulty: you need to touch down not just safely, but directly on an ore deposit or a pre-scouted site to avoid wasting time and fuel on surface traversal. This guide provides a systematic approach to planning, executing, and optimizing precise landings on Tylo for efficient resource gathering.

Understanding Tylo's Environment

Tylo's environment is defined by its high gravity, rugged terrain, and near‑vacuum atmosphere. These factors combine to make any landing a high‑stakes maneuver.

Gravity and Delta‑V Requirements

Safely landing on Tylo from a low circular orbit (say 30 km) requires roughly 2,400–2,600 m/s of delta‑V, assuming a suicide‑burn style descent. For a fully laden resource extraction vessel, this number can climb to 3,000 m/s or more if you plan to ascend back to orbit. Compare this to the Mun (around 580 m/s) or even Ike (about 380 m/s)—Tylo is in a league of its own.

Terrain and Surface Hazards

Tylo's surface is heavily cratered and features steep slopes, canyons, and isolated mountain peaks. Even a small misalignment during descent can result in landing on a 30‑degree slope, risking a topple. Crater rims and boulder fields are common; a flat area big enough for a lander is a luxury. Surface scanning (either via stock SCANsat or the SCANsat mod) is strongly recommended to identify viable landing zones before committing to descent.

Atmospheric Profile

Tylo's atmosphere is negligible—pressure below 0.1 atm even at the lowest altitudes. Parachutes, wings, and airbrakes provide no useful drag. All deceleration must come from your engines. This forces you to manage both vertical and horizontal velocity manually, with no aerodynamic help to scrub energy.

Preparation Before the Descent Burn

Successful precise landings start long before you press the throttle. Here is how to set yourself up for success.

Selecting Your Extraction Site

Use ore survey data from a mapping satellite in polar orbit around Tylo. Look for concentrations above 7% ore abundance—higher concentrations mean faster extraction and less fuel wasted on refining. Mark your target coordinates with a waypoint (press F5 to quicksave, then F9 to reload if you prefer to use the stock waypoint system). Write down the latitude, longitude, and altitude of your site.

Designing the Lander for Precision

Your lander needs three things: enough delta‑V for descent and ascent, good handling during low‑gravity maneuvers, and a low center of mass to avoid tipping.

Engine choice: A high‑thrust engine is essential for Tylo. The LV‑909 “Terrier” is too weak; use the LV‑T30 “Reliant” or a cluster of LV‑909s if you must, but the Vector or Mammoth engines provide the power needed for a controlled suicide burn.
Fuel tanks: Use Rockomax X200‑16 or larger tanks. Avoid tiny tanks that drain quickly.
Landing legs: Use the LT‑2 Landing Strut or LY‑02 Large Landing Gear for stability. Retractable landing legs are fine, but ensure they are wide‑stance.
RCS system: A set of four RCS thrusters (placed symmetrically) with a 600‑unit RCS tank helps you make fine adjustments during the final 100 meters.
Reaction wheels: One medium reaction wheel (like the Inline Reaction Wheel) is enough to control orientation without fighting torque.

Delta‑V Budget Planning

Use the Kerbal Engineer Redux mod or the stock delta‑V indicator in the VAB. For a round trip (land and return to orbit), budget at least 5,000 m/s from low Tylo orbit. For a one‑way resource extraction that stays on the surface, around 2,600 m/s is sufficient. Always add 15–20% margin to account for imperfect burns and terrain compensation.

Executing the Descent from Low Tylo Orbit

With your target marked and your craft ready, it is time to leave orbit and land.

Setting Up the Deorbit Burn

From your low Tylo orbit (20–35 km altitude), wait until your ground track passes over the landing site. Then perform a retrograde burn that lowers your periapsis to 0 meters on the surface directly above your target. Use the maneuver node tool to fine‑tune the burn: the periapsis marker should sit exactly on the site's coordinates. A good rule of thumb: burn until your orbit line touches the surface at the target latitude.

The Suicide Burn Technique

A suicide burn means you wait until the last possible moment to start your deceleration burn, so that you reach zero velocity exactly at touchdown. This conserves fuel but demands split‑second timing.

Switch to the Surface velocity readout on the navball.
Point retrograde (the yellow circle with an X).
Burn at full throttle when your radar altitude reaches about 2–3 km (depending on your vertical speed). If you are falling at 400 m/s, start the burn at 3 km; if 300 m/s, start at 2 km.
As you burn, your vertical speed will drop. Keep the retrograde marker centered.

Fine‑Tuning with Horizontal Velocity

During the suicide burn, your horizontal velocity will also be decreasing. However, because Tylo's surface is rotating (at about 15 m/s at the equator), you may have leftover horizontal speed. Just before touchdown (below 500 m altitude), switch to the Target velocity mode (if you set a target waypoint) and use small RCS puffs or engine gimbal to cancel lateral drift. The goal is to have horizontal speed below 1 m/s at 50 meters altitude.

Advanced Landing Techniques for Resource Extraction

For pinpoint accuracy over an ore deposit, standard suicide burns are not enough. Use these techniques to compensate for inaccuracies.

The Hover‑Adjusted Landing

Engine TWR on Tylo is often above 1.5, meaning you can hover at low throttle without losing control. When you are 200 meters above your target and drifting east, perform a quick burst of RCS or a short engine burn in the opposite direction. Hovering for 4–5 seconds to nudge your position costs about 40–50 m/s of delta‑V—trivial compared to the savings from landing directly on the ore vein.

Using the Navball and Waypoint Alignment

Set your target waypoint before deorbiting. In the tracking station or map view, right‑click the target and select Set as Target. Then, in the flight scene, switch your navball from Surface to Target mode. The target marker will show your bearing relative to the landing site. Use this to keep your descent path aligned.

Predicting Terrain Through Altitude Maps

If you use a mod like SCANsat, overlay the altitude map to spot flat zones. For stock, bring a simple science module like the 2HOT Thermometer and run a surface scan during approach to identify altitude changes. Combine this with your landing camera or the IVA view to pick the flattest spot within 50 meters of the target.

Post‑Landing Operations and Resource Extraction

Once you have touched down, the work is only half done.

Securing the Lander on Slopes

If your lander is on a slight incline (less than 10°), you can either:

Retract and redeploy landing legs to let them auto‑level, or
Use the Stock Craft Positioning System (right‑click and enable “Stability Control”) to keep the craft from rolling.

For slopes above 10°, consider using wheeled landing gear with a small surface mobility platform.

Setting Up the Drill and Converter

Deploy your Drill‑O‑Matic Junior (or the larger variant if you have a Class‑E asteroid attached). Make sure the drill head is contacting the ground—use the altimeter reading; the drill only works when its feet are physically touching terrain. Run the converter at half speed initially to avoid overheating in Tylo's thin atmosphere (radiators are mandatory). Use the Gigantor XL Solar Array for power, but note that Tylo is often in Jool's shadow; bring additional battery or a small nuclear reactor for night operations.

Reversing Course: Ascent Back to Orbit

When you have extracted enough resources, prepare for ascent. Aim to launch when your target site passes under your orbital inclination. Perform a gravity turn starting at about 500 m altitude; keep your pitch parallel to your retrograde marker until you have cleared 10 km. Burn prograde to circularize at 30 km. This ascent should require around 2,200 m/s of delta‑V if you lifted off from a high‑ore region near the equator.

Troubleshooting Common Problems

Too Much Horizontal Speed at Touchdown

If you are sliding across the surface, you came in with more than 2 m/s horizontal. Next time, kill lateral velocity earlier—ideally above 200 meters. If already sliding, kill your engines and let the landing legs absorb the impact; they often grip the ground enough to stop you.

Landing Legs Break on Impact

This usually happens when your vertical speed exceeds 6–8 m/s at touchdown. Increase the throttle in the last 50 meters to slow to 1–2 m/s. If your legs are still weak, upgrade to the LT‑1 Landing Strut or use the ME‑4 Landing Leg (the oldest stock part has low impact tolerance).

Missing the Target by Hundreds of Meters

Your deorbit burn was likely too early or too late. Use the Maneuver Node to place the burn exactly over the target. Or, if you are using MechJeb, enable the Landing Guidance autopilot and input the target coordinates—it will handle the timing for you.