by whale2
uploaded 2017-03-20
mod spaceplane


  • Type: SPH
  • Class: spaceplane
  • Part Count: 84
  • Mods: 10


  • B9 Aerospace - Legacy Parts Pack
  • B9 Aerospace Parts Pack
  • Ferram Aerospace Research
  • Kerbal Attachment System
  • KerbalEngineer
  • MechJeb 2
  • Procedural Wings
  • Squad (stock)
  • TAC Life Support (TACLS)
  • TweakScale - Rescale Everything!


A mod spaceplane called Cygnus-3mi. Has 84 parts. Built in the SPH in KSP version 1.2.2.
Requires FAR! Atmosphere Autopilot highly recommended for its Fly-by-Wire feature. Craft is capable of Single Stage to Mün (one way, sorry) missions and has VTOL capability on Mün. Seats 2 crew + 4 passengers. Can deploy microsatellites.

Flight Manual.


  1. Set Brakes on
  2. Turn Fly-by-wire on, RCS off, SAS off
  3. Set Flaps to position 1
  4. Start up Whiplashes (action group 8)
  5. Full throttle
  6. When thrust is at least 80%, release brakes
  7. Rotate at 130 m/s
  8. Gear up
  9. Flaps up

Achieving Orbit:

  1. Set speed control to 250 m/s
  2. Set climb rate to ~100 m/s
  3. Climb to 10,000 m
  4. Set full throttle and disengage speed control
  5. Set climb rate to 50 m/s
  6. Climb to 18,000 m and keep that altitude
  7. Accelerate to 1400-1500 m/s
  8. Start up Aerospikes (action group 9)
  9. Set climb rate to 200 m/s
  10. Turn RCS on
  11. At ~30,000 m set prograde course
  12. Keep accelerating until desired apoapsis is reached
  13. Coast out of atmosphere, disengage Fly-by-wire
  14. Circularize orbit

Vertical Landing (possible on Mün and celestial bodies with similar or lower gravity):

  1. Use MechJeb to land with nose up (i.e. like a rocket), but set touchdown speed to -0.7 m/s.
  2. Turn on RCS, turn off front and VTOL Vernors
  3. Activate MechJeb landing autopilot
  4. If automatic gear not set, extend landing gear at altitude between 1500-1000 m.
  5. At altitude of 300-200 m, abort autoland, engage Fly-by-Wire
  6. Set full throttle and achieve 0 +/- 1 m/s vertical speed.
  7. Turn front and VTOL Vernors on (action group 6 and 7)
  8. Rotate craft horizontally
  9. Using dorsal translation, keep descent speed in safe range
  10. Adjust craft position and attitude as required

Atmospheric entry:

Spacecraft is capable of high-speed entry if operated correctly.
0. Recommended periapsis for low-speed entry is 30 km, for high-speed entry - 38 km.
1. Retract solar panels (action group 4)
2. Before entering atmosphere, set AoA to 70-80 deg.
3. Engage Fly-by-Wire, turn off moderation.
4. Turn on front Vernor (action group 6)
5. Keep high AoA until craft slowed down to speeds below 1800 m/s
6. Perform further descend and aerobraking as necessary


Maximum landing weight is 45 ton.
Minimum control speed is 100 m/s. Recommended landing speed is 110 m/s for landing weight below 38 ton. Set flaps to position 2.
NavUtilities highly recommended for landing aid.
For Mün return flights I recommend to have at least 1500 dV - some fuel is spent for attitude control during re-entry and some fuel might be required for atmospheric flight to landing site. The craft has reserve tank in the nose with 180 units of LF which is normally locked.

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