'Thunder 4 Heavy'
by Raptor9
uploaded 2017-10-12
stock lifter
#ULA #Delta #IV #Heavy #Medium

The ‘Thunder 4’-series rocket was primarily designed by Rockomax to field a new 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 in a precise orbit, provide full rotation and translation RCS maneuvers, and in some cases even rendezvous and dock a payload to another module. The ‘Thunder P’ also reduces the reliance on fuel tank components from Jeb’s Junkyard, although the LV-T30 ‘Reliant’ engine is retained for use. 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 1’ rocket boosters strapped to either side, the ‘Heavy’ is no slouch. 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 1.3.1.


  • Type: VAB
  • Class: lifter
  • Part Count: 85
  • 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

swipe to switch images, tap to close