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Explodium Breathing Engines "Jet" engines that (actually!) use Eve's atmosphere and Oxidizer. License: MIT License except for re-coloured textures, which were derived from art belonging to Squad / Deported B.V. Download from SpaceDock or from GitHub. Supports KSP 1.12. and supports RealPlume Stock and now Waterfall. It had to happen. After good success with @GregroxMun's Alien Space Programs and @OhioBob's Eve Optimized Engines, along with an old discussion about atmospheric engines using oxidizer instead of liquid fuel, I just had to ask how hard it would be to make jet engines that would breathe "explodium vapour" likely found in Eve's atmosphere and burn it with oxidizer to produce efficient thrust. @JadeOfMaar and @wasml pointed me in the right direction, @DStaal filled in a few blanks, and I hacked together some parts. Introducing Explodium Breathing Engines. A set of cloned configuration files from stock jet engine parts that use oxidizer only, and a new resource configuration found hypothetically in Eve's atmosphere: "Explodium Vapour" evaporated from Eve's Explodium Sea. This vapour may also be present on other planets in popular planet packs. Further rebalancing has happened based on resource abundance and a pure ethane (C2H6) reaction with oxygen. Resource abundance now has a direct impact on engine performance. This is turning from proof-of-concept into something realistic, while still being fun to use. There really is some science behind this that I explain at the project's Wiki, and hammered out in a more recent add-on discussion thread. Modified parts include explodium versions of all intakes, oxidizer + explodium versions of nacelles, oxidizer only tanks and wet wings, and underworld-themed engines: J-21 "Hades" J-34 "Zephyrus" J-91 "Atlas" J-405 "Sphinx" J-X5 "Beelzebub" and let's not forget our favourite: CR-8 L.U.C.I.F.E.R. (Large Unkerbal Cycle-Interchanging Fueled Explodium Rocket) Introducing for 1.7, engines for gas giants, failed or otherwise. Consider this a counter-challenge for Team Galileo: J-22 "Dorothy" J-35 "Scarecrow" J-406 "Lion" J-X6 "Tinman" J-92 "Wizard" and finally the CR-9 S.L.I.P.P.E.R. (Science-Light Impossibly PerPosterous Explodium Rocket) All parts should have a distinct appearance to separate them from stock parts. I put all of the modified parts and ExpVapour resource configurations in a GitHub repository. MIT license to match OhioBob's choice for the Eve Optimized Engines. I'd be glad to let others into the project who know better than I do. The to-do list includes: (The to-do list is finished!) Rewrite parts as Module Manager patches to remove dependency on Squad art (Done!) Fix the intakes to work on Eve only, somehow (Done! Intakes are now zero EC harvesters.) Fix the resource config if needed, integrate with Community Resource Pack (Not necessary as it turns out.) Rebalance engine performance based on tester feedback (we might be almost done!) Produce different artwork to identify the explodium-based parts (I'm just missing some tricky parts.) Create RealPlume configurations; I'd like to do a different colour plume for these like the blue from an ethane flame (This was quite easy, as it turned out.) Maybe get some help with CKAN, publish to Space Dock (SpaceDock done, CKAN should be done) Known problems, should not impact play: Ore mining contracts will appear in Career mode when you unlock tech nodes with harvester parts. This might be a game design problem with contracts lumping all resource harvesters together. Pay attention to contract requirements, because there might be a "Gather 2000 units of Explodium Vapour" contract that won't make sense because there are no containers for it. No colourized textures are available for the Atlas engine or Big-OX wings. The wings don't take well to colourization, and the Atlas causes null reference exceptions if using an alternate texture. Harvesters have a small amount of ExpVapour loaded by default. This means engines will work for a few seconds at launch from Kerbin, but will quickly run out of vapour. This may be needed in KSP 1.3 though. Slow frame rates may happen if using the RealPlume configurations. Update SmokeScreen to 2.7.4 or later to address this. (KSP 1.3) Stationary harvesters will harvest zero ExV, such as craft on launch clamps or with wheel brakes engaged. Once motion starts, harvesters will start harvesting. (KSP 1.3) Engine resource shows up as "Ex V" instead of "Explodium Vapour" in VAB or SPH. Other resource name strings not affected for some reason. To use this part pack, grab a release from GitHub or SpaceDock, and put the "GameData\ExplodiumBreathingEngines" folder into your GameData folder. To use a RealPlume configuration, install RealPlume-Stock and update its SmokeScreen installation to 2.7.4 or later. If you don't install RealPlume, you'll still get a different engine plume for some engines but most will use the stock jet plumes. To use Waterfall plumes, install the Waterfall framework. Now with more Fire! Change log: