by gc1ceo
uploaded 2016-11-15
(updated 2018-06-01)
mod ship
#hermes #mercury


  • Type: VAB
  • Class: ship
  • Part Count: 22
  • Mods: 1


  • Bluedog DB

The Hermes 1L is a modification of the Hermes spacecraft provided by the Bluedog Design Bureau which approximates NASA’s Mercury space capsule. The load has been lightened for KSP stock settings and for a brief sub-orbital ballistic trajectory mission such as heavily reducing the weight of the heat shield and removing most of the monopropellent which reduced the Hermes by more than a ton and a half. I have left a bit of monopropellent so that you can simulate the testing of yaw, pitch and roll thrusters.

The launch vehicle is an Etoh rocket, BDB’s approximation of the Redstone rocket, also known as the Etoh Hermes launch vehicle since its modified for carry a Hermes spacecraft. The launch vehicle hasn’t been modified from the BDB’s manual.

The mission profile approximates the Mercury-Redstone 3 flight plan and has a small set of solid separation rockets (their fuel has been reduced for the Hermes 1L to save weight) and a small single solid engine retro pack which can be fired or left alone as the mission profile isn’t for orbital flight.

The flight plan is extremely simple making this a good craft for new players, simply ascent vertically until your speed is around 80 to 110 m/s and then gently pitch over to 60 degrees to add some trajectory. I recommend shooting for 100 to 120km for a planned apoapsis taking you to around 250 to 300 km downrange from the KSC to approximate Mercury-Redstone 3.

Built in the VAB in KSP version 1.4.3.

swipe to switch images, tap to close