SSTO Boosters
by a10t2
uploaded 2017-11-25
(updated 2018-05-27)
stock lifter


This craft file contains my early- (10 t), mid- (25 t), and late-career (50 t) SSTO boosters. To use, just snap off the desired booster and save as a subassembly. Part counts are low (37, 37, and 56 including SRBs) and R&D progressions are reasonable for Career games.

Fully-recoverable launches to a 100 km equatorial orbit are possible for at least 90% of the boilerplate payload capacity, leaving >200 m/s ∆v for reentry and recovery. Notably, this makes the 50 t booster capable of launching a full orange tank and then some. All three boosters also include reusable SRB modules that splash down east of KSC and extend payload to at least 110% of the rated capacity.

Using the Trajectories mod, precision recoveries at KSC are possible. The 50 t booster will give accurate trajectory results provided the heat shield airbrake is deployed. The 10 t and 25 t boosters instead utilize stock AIRBRAKES; a 100x38 km orbit with periapsis over the peninsula east of KSC will result in a slight overshoot, and a small retrograde burn at 30-40 km can then adjust for landing at the center. Given the impact tolerances of the Twin-Boar and LT-2 legs, respectively, the 25 t and 50 t boosters can also (mostly) survive a zero-fuel landing provided the terrain is level (i.e. KSC).

A stock rocket called SSTO Boosters. Built with 148 of the finest parts, its root part is trussPiece3x. Built in the VAB in KSP version 1.2.2.


  • Type: VAB
  • Class: lifter
  • Part Count: 148
  • Pure Stock
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