Disabling flameout on jet engines in space.

[Solidfox61]

Good evening everyone,

I was trying to figure out how to change certain values in the configuration files of the Jx-4 "Whiplash" jet engine, but after a quick thought I figured that maybe you guys could help me with it. Where exactly do I have to go and what do I exactly need to change in the configuration files so that the jet engine would start behaving itself like any other one that isn't dependent on the Kerbins' atmosphere (so that no air-intakes would be required and such)? 

[sebi.zzr]

1 hour ago, Solidfox61 said:

Where exactly do I have to go and what do I exactly need to change in the configuration files so that the jet engine would start behaving itself like any other one that isn't dependent on the Kerbins' atmosphere (so that no air-intakes would be required and such)? 

Welcome to the forums.Maybe this will help you start:

http://wiki.kerbalspaceprogram.com/wiki/Module#ModuleEnginesFX

[Pecan]

6 hours ago, Solidfox61 said:

...so that the jet engine would start behaving itself like any other one that isn't dependent on the Kerbins' atmosphere (so that no air-intakes would be required and such)? 

THE jet engine?  There are several.  Jet engines burn Liquid Fuel (LF) and get their Oxidiser (O) from the atmosphere.
Conversely, rocket engines burn Liquid Fuel AND Oxidiser (LFO) so are not dependent on the atmosphere.

Except the Rapier - which is specifically designed to work in open (LF, jet) or closed (LFO, rocket) as required.
If you're modding another engine the details for the rapier are probably the best place to start or, perhaps now you know that's there, you don't even need to mod one of the others. (It's your first post, so I don't know how much experience with KSP or modding you have).

Welcome to the forums.

[Vanamonde]

Question about modding the game moved to the modding subforum. 

[Van Disaster]

Turn on infinite fuel, tbh. Otherwise if you want a vacuum engine as efficient as a jet, edit the ISP of a rocket. Jets don't work in a vacuum no matter how you fuel them, just do the rocket.

Edited August 11, 2016 by Van Disaster

[Streetwind]

14 hours ago, Solidfox61 said:

Good evening everyone,

I was trying to figure out how to change certain values in the configuration files of the Jx-4 "Whiplash" jet engine, but after a quick thought I figured that maybe you guys could help me with it. Where exactly do I have to go and what do I exactly need to change in the configuration files so that the jet engine would start behaving itself like any other one that isn't dependent on the Kerbins' atmosphere (so that no air-intakes would be required and such)? 

Option 1: remove the PROPELLANT node for IntakeAir from the engine. This the most direct answer to your question, and turns the Whiplash into a monopropellant rocket engine with an absurdly unrealistic Isp that which ignores IntakeAir completely. You can then edit the Isp if you feel it needs to be tweaked, but hey, it's your game. Use whatever settings you want

Option 2a: Add a ModuleGenerator to the engine that constantly produces IntakeAir out of nowhere (probably in return for costing Ec to operate).
Option 2b: Create a dedicated part that performs this air creation function, and put it on your spaceplane.

Option 3: Implement a switchable multimode engine like the RAPIER, which can toggle between airbreathing mode for atmospheric flight and closed cycle mode for in-space operation.

 

Edited August 11, 2016 by Streetwind