Difference between revisions of "Sepratron I"

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[[Category:Solid rocket boosters]]

Revision as of 11:00, 31 October 2014

Sepratron I
Part image
Solid rocket booster by
Periapsis Rocket Supplies Co

Radial size Radial mounted
Cost (total) 75.00 Funds
(dry) 70.20 Funds
Mass (total) 0.07 t
(dry) 0.01 t
Drag 0.2-0.3
Max. Temp. 2000 K
Volume  ?
Impact Tolerance 7 m/s
Research Precision propulsion.png Precision Propulsion
Unlock cost 1 100 Funds
Since version 0.17
Part configuration solidBoosterSep.cfg
Solid rocket booster
Maximum thrust (1 atm) 13.79 kN
(vacuum) 18.00 kN
Isp (1 atm) 118 s
(vacuum) 154 s
Fuel consumption 1.59 Units of fuel/s

Thrust vectoring No
Fuel 8.0 Units of fuel
Burn time (1 atm) 3.9 s
(vacuum) 5 s
Testing Environments
On the surface No
In the ocean No
On the launchpad Yes
In the atmosphere Yes
Sub orbital Yes
In an orbit Yes
On an escape No
Docked No
Test by staging Yes
Manually testable Yes

The Sepratron I is a very tiny solid rocket booster with a very short burn-duration but a great amount of thrust for its mass.


Capsule with Sepratrons for emergency escape

Unlike traditional SRBs, the Sepratron provides too little thrust to be useful during most takeoffs. Instead it offers two great advantages over other boosters: Its small size allows the Sepratron to be placed on almost any surface, while its low weight generally eliminates the need to detach them after burn-out. Red block letters on its casing read "BIG ROCKET THING. DO NOT DROP".

Possible uses include:

  • Rocket-assisted take-off by mounting Sepratrons on the body of a plane;
  • Stage detachment: Placed on a spent stage and angled correctly, activating Sepratrons during the detachment of the spent stage can drive the debris away from the rocket;
  • Test launches of lightweight vehicles (explanation needed); note that Sepratrons can quickly overheat adjacent parts
  • Emergency escape engines; attached to a capsule or other important part and bound to the "Abort" action group, Sepratrons allow said parts to quickly and easily escape from exploding rockets and other emergencies. Now with the Launch Escape System, larger manned spacecraft (such as those which use the small to large radial sized Mk1-2 Command Pod) no longer need Sepratrons, but Sepratrons are still the solution for smaller manned spacecraft, such as the one shown in the picture.
  • Used as a way to substitute for thrust loss. Separating a stage and setting them off when decoupling can be used to maintain constant thrust.
  • Used as a way to deorbit small, unused probes on a low orbit.

Product description

Although formerly designated as "really pretty crappy", Kerbal Scientists have slowly warmed up to the Sepratron I's many uses, such as separating things. For best results, angle before use.


  • Mass decreased from 0.2175t Full, 0.15t Empty to 0.0725t Full, 0.0125t Empty. Thrust decreased from 20 kN to 18 kN. Fuel capacity reduced from 9L to 8L. The Sepratron I now has the best TWR of all stock engines.
  • Initial release.