'Thunder 4-1'
by Raptor9
uploaded 2017-10-12
(updated 2019-05-06)
stock+DLC lifter
#ULA #Delta #IV #M+(5;2) #Medium

The ‘Thunder 4’-series rocket was primarily designed by Rockomax to field a new stretched core stage, and a re-designed upper stage. In contrast to the ‘Thunder 2’ upper stage, the ‘Thunder P’ is a fully-developed payload stage; in that it can place a payload into a more precise orbit and in some cases even rendezvous and dock a payload to another module. The ‘Thunder P’ also reduces the reliance on components from Jeb’s Junkyard, although the LV-T91 ‘Cheetah’ engine is retained. In an effort to compete with Kerbodyne in the emerging heavy-lift market, Rockomax has marketed the ‘Thunder 4 Heavy’. Essentially a ‘Thunder 4’ core with a pair of ‘Thunder 1E’ rocket boosters strapped to either side, it combines the lifting power of three RE-M3 ‘Mainsail’ engines with the orbit placement capabilities of the ‘Thunder P’.

For more lifters of various sizes and payload ratings, check out the Rocket Market.

Built in the VAB in KSP version 1.7.0.


  • Type: VAB
  • Class: lifter
  • Part Count: 59
  • Pure Stock

If you like what you downloaded, and want to share screenshots or stories of success, glory, or failure, feel free to comment in my craft catalog thread on the KSP Forums -Raptor9

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