As you can see, it was three months ago when I said this, and obviously I didn't expect the workload to be so heavy. But finally, in the beginning of 2023, I completed ----PHOSPHERUS-H1 Version 3 of the launch vehicle, PHOSPHERUS-H1 Block 3.

I have to admit, I didn't do a good job: vizzy didn't write well, couldn't get into the orbit accurately, was limited by the equipment, and a lot of details weren't done well or at all, but it was the best I could do at this point. As one of my best works so far, I hope you like it.

As for the name "PHOSPHERUS ", I hope this series will be a starting point in my SR2 career and guide my future path.

* There are now two PHOSPHERUS rockets in the series. Here is a brief introduction to the naming rules:

The PHOSPHERUS series has four subseries, which are "S", "SL", "M" and "H".

S means Solid , that is, solid rocket
SL means Small Liquid rocket
M means Medium , which means medium liquid rocket
H means Heavy , heavy liquid rocket

* Each rocket name consists of "Starstar series model +Block number + number of second stage engines + number of boosters", such as PHOSPHERUS-H1B32N.

* So let me introduce the PHOSPHERUS-H1 launch vehicle.

The basic version of the rocket is B32N configuration. (Other variants simply add different boosters and change the number of secondary engines)

First-stage diameter (excluding stage interval) :5.65m, height (excluding stage interval) :50.17m, liquid oxygen tank below, methane tank above. Using two CE-1D engines.

CE-1D engine uses liquid oxygen-methane oxygen-rich high-pressure secondary combustion cycle for regeneration and cooling, which can swing in all directions and the maximum swing Angle is 3.5°.

Second-stage is a hanging storage tank with liquid hydrogen storage tank on the top and liquid oxygen storage tank on the bottom. Maximum diameter:7m,liquid hydrogen tank diameter:6.72m,liquid oxygen tank diameter:4.7m,total height of the second stage:19.6m,two CE-2A engines are used.

The CE-2A engine is a liquid hydrogen and oxygen expansion cycle with extended nozzles and uses regenerative cooling and radiation cooling respectively. It can swing in all directions, with a maximum swing Angle of 4.5°.

Fairing diameter:7m, height:25m, using rotary separation.

'[RSS]PHOSPHERUS-H1B32N Take-off mass:975t, 500*500km orbital capacity: 30t'.

Like the previous version, PHOSPHERUS-H1 also has simulated engine firing, transonic effects, wake cloud effects, and a less accurate automatic launch system.

* How to use:

Press AG 7 to start the automatic launch data entry program. According to the input data displayed on the screen, you can launch immediately after completion, or you can choose a suitable time to launch, just press AG 7 again.

AG 8: Lights on a rocket

AG 19: Service tower lighting

* Note:

Do not press AG 7 a second time before pressing any activation group other than the above. Launch may be affected.

* Effects display (unfortunately, there are some problems with the equipment and many images cannot be displayed as GIFs)

CE-1D Ignition Effect:

CE-2A Ignition Effect:

Water spray noise reduction effect:

Traction release effect:

Transonic effect:

* Also, I've made other low-P versions that you can choose from depending on your device:





Universal solid booster

Thanks to RocketLover2333 and AstronautiChempion for their inspiration and help, and to all your support

Happy New Year to you! Have fun!


  • Successors 1 craft(s)
  • Created On: Windows
  • Game Version: 0.9.924.0
  • Price: $1,088,086k
  • Number of Parts: 6242
  • Dimensions: 101 m x 30 m x 48 m


  • Total Delta V: 14.3km/s
  • Total Thrust: 25.4MN
  • Engines: 16
  • Wet Mass: 2.05E+6kg
  • Dry Mass: 6.22E+5kg


Stage Engines Delta V Thrust Burn Mass
4 2 0m/s 0N 0s 2.05E+6kg
5 4 1.9km/s 21.3MN 2.7m 2.05E+6kg
10 4 1m/s 1.3MN 0s 2.19E+5kg
11 2 12.4km/s 2.4MN 6.6m 2.19E+5kg



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