Guide to Kerbal Space Program...for Complete Beginners! - Part 3 [Space!]

Overview / Storyline

This episode is a tutorial walkthrough hosted by “creatine” that teaches building a simple craft to reach space, run experiments, and return safely. Jebediah Kerman pilots the flight. Primary goals covered: escape the atmosphere, reach space (70 km), collect science from different atmospheric layers and space, stage/detach spent parts, and re-enter and recover the command pod.

Craft construction highlights (why parts matter)

Start with a Mark I command pod (this is the return vehicle). Key additions and why they matter:

• Mark 16 parachute — required for safe recovery of the pod.
• Correct-size heat shield (1.25 m for a Mark I) — protects the bottom of the capsule during reentry; it must face the airstream.
• Stack decoupler under the capsule — jettisons upper stages so only the capsule returns.
• Liquid-fuel engine and fuel tanks (recommended) — allow throttle control and engine gimbaling for steering and gravity turns. Solids are powerful and cheap but have no throttle and limited steering.
• Small aerodynamic fins (4-way symmetry) low on the stack — improve stability in thick atmosphere and help prevent flips during ascent.
• Science parts mounted on the capsule (mystery goo, thermometer, barometer, etc.) — place experiments on the returnable part so you bring data home.

Key mechanics and measurements

• Thrust-to-weight: approximate required upward force by mass × gravity. Kerbin gravity ≈ 9.8 m/s² (~10 for quick math). Example: 5 t × ~10 ≈ 50 kN weight; engines must exceed that thrust at sea level to lift the craft.
• Engines show thrust (kN) and ISP (efficiency). They have ASL (sea level) and VAC (vacuum) ratings — performance changes with altitude.
• Liquid tanks contain both liquid fuel and oxidizer in the correct ratio; oxidizer is required for combustion in vacuum.
• Aerodynamic effects: white streaks/particle effects mean your craft is hitting the air hard — this increases drag and heating. Throttle down in dense atmosphere to reduce inefficiency and heating.

Flight procedure (simplified step-by-step)

1. Pre-launch checks

   • Verify staging (engine first, decoupler, then parachute).
   • Confirm SAS availability if you’ll use it.
   • Check mass/part count and launchpad/VAB limits.

2. Launch

   • Throttle to full (Z), engage SAS (T) if desired, and stage to ignite.
   • Climb vertical initially. Don’t start the gravity turn too early.

3. Gravity turn

   • Around ~100 m/s or ~1 km altitude, begin a gentle pitch eastward (5–10°). East gives an initial rotational boost from the planet.
   • Gradually pitch toward horizontal over time to build sideways (orbital) velocity.
   • Keep the ship’s nose reasonably close to the prograde vector (yellow marker on the navball).
   • Monitor drag/heating and throttle down if needed while in dense air.

4. Reaching space

   • Space begins at ~70 km (70,000 m). You’ll get “in space” notifications and can collect space science.
   • Use the map/trajectory to track apoapsis. For a suborbital flight, you’ll coast to apoapsis and then descend.

5. Staging to return

   • Before reentry, stage to decouple and jettison non-returnable parts so only the capsule (with heat shield) re-enters.

6. Reentry and landing

   • Orient the capsule so the heat shield faces the direction of motion during reentry (use the retrograde marker).
   • Monitor part heat; heating peaks in upper atmosphere and worsens if you hit dense air too fast.
   • Parachute deployment: parachute icon colors indicate safety — red = unsafe (would rip off), yellow = risky, white = safe. Typical safe deployment is below ~10 km; full deployment height often around ~1,000 m depending on settings.
   • Land or splash down and recover the vessel to convert science into points.

Science collection and workflow

• Run experiments at multiple altitudes/biomes for maximum science: lower atmosphere, upper atmosphere, and space.
  • Biome boundary: roughly 17,000 m (lower vs upper atmosphere).
  • Space begins at 70 km.
• Recommended experiments: mystery goo, thermometer, barometer, and crew reports. Place experiments on the returnable capsule so the data can be recovered.
• Crew report clipboard: only one crew report can be stored on the seat at a time. Workaround:
  • EVA, take data from experiments and stow them (transfer to the pod inventory), then perform another crew report. This avoids overwriting higher-value data.
• Different locations yield different science values; space crew reports and space-range experiments are more valuable.

Useful strategies & key tips

• Always include a heat shield and ensure it faces the airstream during reentry.
• Start your gravity turn slowly: around 100 m/s or ~1 km altitude, pitch only 5–10° initially.
• Keep your facing (orange marker) near the prograde (yellow) marker; large deviations are dangerous.
• Prefer gimbaling liquid engines for steering and finer control; solids are useful for cheap vertical boost but not for orbital control.
• Use fins to stabilize liftoff but don’t oversize them — large fins can make steering harder.
• Manage throttle to balance speed against heating/drag; full throttle low in the atmosphere is inefficient and can overheat parts.
• Verify staging and part counts/mass limits before launch.
• If experiment data is on the pod clipboard and you want another crew report, EVA and store the data off the clipboard to avoid overwriting.

Numbers / Threshold reminders

• Biome boundary: ~17,000 m.
• Space begins: 70 km (70,000 m).
• Safe parachute deployment: typically below ~10 km; full deployment often around ~1,000 m depending on parachute settings.
• Start gravity turn: ~100 m/s or ~1 km altitude; initial pitch ~5–10°.
• Thrust-to-weight quick calc: mass (t) × ~10 ≈ kN needed to hover; engine thrust (kN) must exceed that to ascend.

Errors / Troubleshooting

• Early aggressive pitch can flip the rocket — if that happens, revert the launch and try a gentler turn.
• If you stage the wrong part (e.g., jettison the pod), revert or reload.
• White streaks in the atmosphere indicate high drag; throttle down or redesign to avoid excessive speed in dense air.

Featured players / sources

• creatine — host / tutorial guide
• Jebediah Kerman — pilot mentioned on the flight

End of summary.