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The SSTO D-1 Basic Mk.4 is a Low-tech Single Stage Spaceplane that will take 6.8 t to Low Kerbin Orbit with 130 m/s dV to spare for deorbit.
Whiplash Turbo Ramjet is the most expensive Tech node required for this craft.
The Mk.4 has been slightly redesigned compared to the Mk.3. The crew cabin was moved forward and the full and empty Center-of-Mass is now right in the middle of the cargo bay.
See also the new D-5 Diamond for a lighter craft with more capacity for payload and range.
- 4 Turbo Ramjets, and 2 LV-T45s.
- Ventral docking port and RCS.
- Liquid Fuel: 3220
- Oxidizer: 1980
- Dry Weight: 21.7 t.
- Wet Weight: 47.7 t.
- Max Payload (LKO): 6.8 t.
- Max Take-off weight 54.6 t.
- Type: SPH
- Class: spaceplane
- Part Count: 61
- Pure Stock
- Built in the SPH
- KSP version 1.0.5
- Cost: 50,904
- Full throttle, Stage and Take-off
- Pull-up so you’re at a 25-30° ascent.
- At 7 km start pushing nose down, so you’re at 10° ascent at 9 km.
- At ~1000 m/s pitch up slowly to reach 15° above horizon before 15 km.
- At 18 km Stage to engage the LV-T30s.
- At 25 km start pitch down to 10° above horizon.
- When AP is above 60 km point the nose Prograde.
- Throttle down when AP is at your desired altitude.
- Circularize at AP.
- 80 km orbit. In Map mode, focus Kerbin and turn camera so KSC is facing towards you right above the Navball.
- Time warp until your spaceplane is right behind Kerbin.
- Put a maneuver node right where you orbit appears from behind Kerbin on the left side.
- Pull the retrograde marker until the planned orbit intersects the surface through KSC.
- Perform the maneuver.
- Turn Prograde and time warp till you enter atmosphere.
- Keep nose 25° above horizon until your speed is around 1400 m/s. (May need to move fuel around to keep stable)
- You should be nearing the coast of the landmass where KSC is at 30 km altitude.
- Nose down 0°-5° below horizon and aim to pass the mountains at 10 km, at 650-750 m/s.
- Nose down further, if needed, and aim for a point about half the runway length in front of the runway.
- Use brakes to slow down to around 90 m/s.
- At 200 m, flare and aim for the runway.
- Touch down with less than 3 m/s vertical speed.
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