From Kerbal Space Program Wiki
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| − | {{:LFB KR-1x2/Box}}
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| − | The '''LFB KR-1x2 "Twin-Boar" Liquid Fuel Engine''' is a [[liquid fuel tank]] and a [[liquid fuel engine]]. Usually only [[solid rocket booster]]s using [[solid fuel]] contain both, because solid fuel can't be transferred. Unlike solid rocket boosters this liquid fuel booster can run longer by pumping additional liquid fuel and oxidizer to the part. It is also throttleable, both by the main throttle and a thrust limiter [[tweakable]]. Minimum thrust required for booster to lift its own weight is 17.5%.
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| − | The ''LFB KR-1x2'' might be a reference to the ''Advanced Boosters'', a future [[w:Space Launch System|Space Launch System]] Block 2 component.
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| − | This booster contains two engines at the bottom which are added radially, so the base of the booster is wider than a usual large tank. It also does not allow any parts to be attached below it. It contains the same amount of fuel as the [[Rockomax Jumbo-64 Fuel Tank]] (2880). The thrust is higher than the [[Rockomax "Mainsail" Liquid Engine]] and is thus the most powerful large-sized engine. However, its [[specific impulse|I<sub>sp</sub>]] is slightly (5-10 s) lower than that of the Mainsail at all altitudes.
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| − | The ''LFB KR-1x2'' is the only part that is simultaneously a liquid fuel tank and engine.
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| − | == Usage ==
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| − | The ''LFB KR-1x2'' is an unusually good engine, once the weight and cost of the fuel + tankage is subtracted out it weighs almost the same as a Mainsail, but has 33% more thrust. This makes it an excellent and cost-effective mid-game launcher for larger payloads.
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| − | It is also the best engine in the game for first stage recovery, it has a high impact tolerance of 20m/s and being very tall makes it extremely buoyant in case of a splashdown, this allows skimping on parachutes. Even in the case of a bad landing which results in partial disintegration of the rest of the stage the integrated fuel tank is always recovered so the recovery percentage in case of a crash landing is higher than for other engines.
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| − | == Product description ==
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| − | {{Quote|This liquid fuel booster system is a very purposeful piece of engineering. Instead of relying on single engines or solid rocket boosters, the KR-1x2 employs two modified KR-1 engines, fed by a built-in fuel system, as the source of its immense lifting power. All that self-contained goodness comes at the cost of not having a mounting point for its underside, and not being quite as efficient as dedicated engines. It also comes at quite a literal cost as well.|Kerbodyne 0.24}}
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| − | == Changes ==
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| − | ;[[0.24]]
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| − | *Changed cost (5900 -> 16400), reduced Isp from 320-360 s to 290-340 s, changed description.
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| − | ;[[0.23.5]]
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| − | *Initial release
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| − | {{Parts}}
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| − | [[Category:Liquid fuel engines]]
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| − | [[Category:Liquid fuel tanks]]
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Revision as of 18:15, 17 March 2017
