Derived from the Daggerback VTOL, Daggerback Heavy is a stock SSTO meant for RSS or equivalent 1:1 scale solar systems. Aside from purely cosmetic parts, the vehicle, its propulsion system, and propellant tanks are untinkered. The spaceplane uses present-day technologies and methods to deliver up to 100 tons to LEO. The vehicle does not come loaded with payload.

To operate the vehicle, AGs, and their functions must be understood.
1 - Rockets: the main propulsion system meant for ascent.
2 - Flyback Jets: auxiliary sustainer jets meant only for subsonic flyback to launch sites when the vehicle is empty. Will not work for takeoff.
3 - Low Speed Canards: forward control surfaces meant to augment stall and takeoff performance. Usage ONLY for speeds LOWER than 250 m/s
4 - Cargo Bay Doors: deploys cargo bay doors
5 - Landing Lights: lights meant for night landings
6 - Lights: navigation and anti-collision lights
7 - GPWS: ground proximety warning system, alerts and cautions pilot of critical events (landing gear status, altitude, sink rate, stall)
8 - Landing gear: significantly increases drag. Deploy late as safely possible
9 - Control Surfaces: activates/deactives aft control surfaces (elevons and rudder)
10 - RCS: activates reaction control system thrusters for in-space attitude control and translation. May also be needed for orbital maneuvers!

I recommend a pretty steep ascent profile (25 degs - 35 degs AoA).

This version is not resistant to reentry on RSS, so turn off or lower heat damage!!

Hyperpatch's RSS is pretty good, I launch from the shuttle landing facility, but should be capable of any runway:


  • Created On: Windows
  • Game Version: 1.0.909.1
  • Price: $2,819,193k
  • Number of Parts: 165
  • Dimensions: 32 m x 76 m x 168 m


  • Total Delta V: 8.7km/s
  • Total Thrust: 179.2MN
  • Engines: 25
  • Wet Mass: 2.22E+7kg
  • Dry Mass: 1.36E+6kg


Stage Engines Delta V Thrust Burn Mass
1 20 8.7km/s 179.2MN 6.2m 2.22E+7kg
2 5 0m/s 0N 0s 2.22E+7kg


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    Another real nice one!!

    10 months ago
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    I know from all my failed attempts how hard SSTOs are to make. I can’t imagine how difficult this must have been.
    Nice job

    11 months ago
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    24.6k BM94


    11 months ago
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    4,469 WVBOBK

    It’s really a work of art. Very nice.

    11 months ago
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    This thing is way bigger than I thought, but is super fun to fly!

    11 months ago
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    1,682 TomKerbal

    Whow! I have to try that !

    11 months ago


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