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The Eve mission had been planned for months, but Jeb blew up most of the KSC's fuel tanks in a joyride test flight. However, the tiny Oscar B fuel tanks intended for probes survived. Now you must build an Eve lander that only uses Oscar B fuel tanks. Rules: A lander must land on Eve's surface and safely return a Kerbal to Kerbin. External command seats are allowed. The only fuel tanks allowed on the lander are Oscar B tanks. No srb's or monoprop tanks allowed on the lander. Oscar B fuel tanks are not required to transport the lander to Eve. See the scoring section for more info. Any engine is allowed except for srb's and monoprop engines on the lander. Yes, this means you can put a Mammoth engine under an Oscar B tank if you really want to. If you can, please attempt doing this without an ISRU. You must use at least 100% re-entry heating. No excessive part clipping. Multiple launches are allowed but please include them in your mission report. Any mods used must be listed in your mission report. Please include either a list of images (imgur album) or a video of your mission. Include the craft's mass etc. in the vab, launches, major burns, etc. I shouldn't need to say this, but no cheating/f12 for infinite fuel/hyperedit. Hyperedit is allowed for testing purposes but not in the final mission. Mods Allowed: Any informational mods (Kerbal Engineer Redux, Mechjeb, Trajectories, Nano Gagues, Transfer Window Planner, etc.) Any visual mods (Environmental Visual Enhancements, Scatterer, Planetshine, Distant Object, Various skyboxes, etc.) Certain miscellaneous mods (Chatterer, [X] Science, etc.) Mods Disallowed: Mods that add parts (except Kerbal Engineer Redux and Mechjeb) Mods that edit the physics, atmosphere, gravity, etc. Using cheat mods such as hyperedit during the mission. Be careful! Oscar B landers can have very high part counts! Scoring: You will be scored by the following levels: Level 1: Transport 1 or more Kerbals to Eve's surface and return the Kerbals to Kerbin. Oscar B tanks are only used on the lander. Non-Oscar B tanks are used in the launcher and transfer stage to get the lander to Eve. Level 2: Transport 1 or more Kerbals to Eve's surface and return the Kerbals to Kerbin. Oscar B tanks are used on the lander and on the transfer stage to get the lander to Eve. Level 3: Transport 1 or more Kerbals to Eve's surface and return the Kerbals to Kerbin. Oscar B tanks are used throughout the entire mission and no other fuel tanks are used. Level 4: Impress me! Expand on this challenge and do the seemingly impossible! Some examples: Extremely low mass/cost, unique design, or building an SSTO. (Building an Oscar B Eve SSTO is probably impossible but if you manage to do so you are amazing.) Leaderboards: Level 1: Level 2: @sevenperforce Level 3: Level 4: I would love to see your entries in the comments below!

Today I fly an Eve lander that only uses Oscar B tanks! Here is my video: