Delta IV Medium+ (5,4) is the second largest flown member of the Delta IV Rocket Family. Similar to the Delta IV Heavy it has a 5-meter wide DCSS. However, unlike the Delta IV Heavy, this variant only has a single core with an additional 4 GEM-60 SRBs. These SRBs can either be gimbaled or static (I used the vectoring nozzles as they are cooler).
Along with the (5,4) family member, there is the (5,2) variant. I am not going to post this version publicly, but I have an unlisted link below if you would like to check it out.

Delta IV Medium+ (5,2)

The Vizzy used for flight is a modified version of GoldenShadowGS's Orbital Maneuver Suite that allows for more user-friendly use.
  • High physics setting required


User Interface for customizable orbits around Droo, Brigo, and Luna

Custom Vectoring SRB Nozzles

Realistic Solid Rocket Booster Separation

Custom RL10-B-2 Engine, with extendable nozzle, and realistic deployment


  • Created On: Windows
  • Game Version: 0.9.918.1
  • Price: $35,835k
  • Number of Parts: 1711
  • Dimensions: 66 m x 9 m x 6 m


  • Total Delta V: 5.0km/s
  • Total Thrust: 6.1MN
  • Engines: 18
  • Wet Mass: 3.67E+5kg
  • Dry Mass: 1.13E+5kg


Stage Engines Delta V Thrust Burn Mass
1 5 2.8km/s 5.0MN 2.5m 3.67E+5kg
4 12 43m/s 76kN 44s 78,219kg
6 1 2.2km/s 988kN 2.3m 78,219kg


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    75 Natno


    4 months ago
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    @Samps0n The tanks with liquid hydrogen or water were meant to me empty, they weren't actually fuel tanks (like in the custom RL10, the nozzle would not be a fuel tank). It was just a place holder fuel I could use that isn't used elsewhere.

    4 months ago
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    Love the attention to detail, I bet you do models. I noticed that many of your fuel was either labeled liquid hydrogen or don’t have any fuel. Well I was having issues completing the more interesting obits and, well I got more than 6086m/s in delta v out of your craft. While you might refute filling the empty tanks if your a stickler for the accuracy that this shows but that leaves the lion’s share which was the wrong the label most likely and, well, I hope it’s welcomed news. My upvote for sure tho is gorgeous!

    4 months ago


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