![]() ![]() ![]() In the real world, typical liquid fuels are liquid hydrogen and a highly-refined kerosene blend called RP-1, and typical oxidizers are liquid oxygen and nitrous oxide.Īll liquid fuel rocket engines can be staged and respond to throttle controls. This engine has a very low thrust, but is very efficient, with an Isp of over 1000 seconds. The IX-6315 "Dawn" Electric Propulsion System uses xenon gas and electric charge to power it. The exceptions are the O-10 MonoPropellant Engine which uses monopropellant and the LV-N "Nerv" Atomic Rocket Motor which only consumes liquid fuel (heating it in the core of a nuclear reactor rather than combusting it with oxidizer). Most liquid fuel engines utilize a mixture of liquid fuel and liquid oxidizer in a 9:11 ratio - generally called “rocket fuel”. Lower thrust-to-weight ratio compared to solid rocket enginesįuel and oxidizer can be moved between tanks or vesselsĪvailable in a wide range of shapes, sizes, and power levelsįrequently gimballed to allow flight control Less efficient in atmosphere than jet engines, and less efficient in space than ion enginesĬan be throttled to allow fine tuning of thrust ![]() It offers no real control beyond choosing when to ignite it, though tweakables enable altering the thrust limit and total fuel. Solid fuel is simply a self-oxidizing compound or mixture within a casing with a nozzle at the end to direct the exhaust gases produced. The most basic type of rocket engine is the solid fuel rocket. Low efficiency compared to other types of engines High thrust-to-weight ratio, especially in atmosphereĬannot be throttled or switched off after ignitionĬannot refuel or transfer fuel stored elsewhere on the craft → Main article: Solid rocket booster Advantages They are located in the "Aerodynamic" category in the game. ↑ 2.0 2.1 2.2 The FAT-455 Aeroplane Main Wing, Big-S Wing Strake, and Big-S Delta Wing are a combination of lifting surface and liquid fuel tank.↑ 1.0 1.1 1.2 The Engine Nacelle, Engine Pre-cooler, and Mk1 Diverterless Supersonic Intake are a combination of air intake and liquid fuel tank.In flight they face the trade-off between the lower atmosphere where intake air is easily available at lower speeds but air resistance is greater, and the upper atmosphere where there's less air resistance but higher speeds are required to collect sufficient intake air. The classical rocket equation doesn't hold valid for them. ![]() This is represented in-game by a much lower rate of fuel consumption. Jet engines use the same fuel as rocket engines, but unlike them jets draw oxygen from the atmosphere using air intakes rather than carrying the weight of oxidizer onboard. Listed below are general descriptions of jet engines and several broad types of rocket engines along with their advantages and disadvantages.ĭoes not respond rapidly to throttle changes due to turbo lagĬan only be used with an oxygenated atmosphere They differ by the kind of fuel they use and the controls used to operate them in-game. All use the same resources and are controlled the same way.Īll KSP's other reaction engines can operate using only resources stored or generated onboard and are collectively called rocket engines. Staying relevant to KSP, we separate out air-breathing jet engines which can only operate inside an oxygen-rich atmosphere from those able to operate in space. Different sources classify kinds of reaction engine a bit differently, but all contradistinguish those which must collect outside material from those using only onboard material as reaction mass. ![]()
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