by EmpressNeptune
uploaded 2016-08-04
stock spaceplane
#SSTO #Long #Range #Nuclear #Interplanetary


Modified version of S-840B using nuclear propulsion for improved efficiency. Currently rated for 36 ton lifts. Requires shallower ascent.

A stock aircraft called S-840B-N SSTO. Built with 111 of the finest parts, its root part is mk3Cockpit.Shuttle.

Built in the SPH in KSP version 1.1.2.


  • Type: SPH
  • Class: spaceplane
  • Part Count: 111
  • Pure Stock

Designed to carry 36 ton payload to 85x85 orbit with 3000 Delta V remaining. Will escape atmosphere without turning on NERV’s.

Flight profile:

Disable fuselage fuel tanks

Accelerate to 500 m/s at sea level

Pull up 10 degrees (heavy) to 17 degrees (empty)

Climb to 13000 m, then increase nose attitude by 5 degrees

Climb to 26000 m, then use action group 1 to toggle RAPIER mode, follow prograde

Watch total fuel guage, when 10000 internal fuel remains (be careful when caring fuel cargo) enable rear fuselage fuel tank or RAPIER engines will run out of fuel

Max apoapsis while maintaining 3000 dv with 36 ton payload is 85000 m

Action group 4 to toggle RAPIER, or action group 1 to set to jet mode

Circularize at apoaposis, stage or use action group 5 to toggle nuclear engines

To deorbit set periapsis to 30000 m ~ 1/10 Kerbin circumference ahead of KSC

Maintain 30 degrees AoA until speed is below 1300 m/s. Shift fuel to change AoA balance, monitor yaw rate.

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