O.R.C.A. v3
by fourfa
uploaded 2018-03-21
(updated 2018-03-24)
stock+DLC spaceplane

Action Groups:
1: switch RAPIER modes (not needed)
2: toggle OMS
4: Cargo bay

54t (1.5 orange tanks) to 100km x 100km with fuel to spare. Center of mass is centered in the cargo bay, and hardly moves during flight. With a smaller cargo, use structural elements to mount it centered in the cargo bay.

Flight to orbit is simple: rotate at 80m/s, then hold a 8 degree pitch. Light the Wolfhounds when the speed maxes out (should be ~1560m/s) - you do not ever need to use the RAPIERs rocket mode. Set your apoapsis where you want it, set SAS to prograde, and coast to your circularization burn. You can save some dV by letting your attitude drift toward prograde as you start to push out your time-to-apo.

For landing, max out the tailplane limiter and make use of the split-wingtip airbrakes with the B key. Lands like a kite when empty. Try to maintain 80-100m/s when full. Don’t be alarmed by the stock center of lift indicator - using the more accurate CorrectCOL mod, the CoL sits just behind the CoM and is passively stable at all speeds.

This O.R.C.A. v3.1 is updated with new parts from the Making History expansion: new nacelle tanks, and Wolfhound engines for OMS. This allowed a 30t reduction in starting mass and 11 fewer parts for the same lift capacty. Also new fairing nose, relay dish, tweaked main wing incidence, and added propellant.

Built in the SPH in KSP version 1.4.1.


  • Type: SPH
  • Class: spaceplane
  • Part Count: 73
  • Pure Stock


  • Making History DLC
  • Squad (stock)

Action Groups:

1: switch RAPIER modes (not needed)
2: toggle OMS
4: Cargo bay

swipe to switch images, tap to close