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| − | {{:48-7S "Spark" Liquid Fuel Engine/Box}}
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| − | The '''48-7S "Spark" Liquid Fuel Engine''' is a [[liquid fuel engine]] for small craft.
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| − | == Product description ==
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| − | {{Quote
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| − | |The 48-7S may be small, but it packs quite a punch for its size. This little engine is a testament to how larger does not always means more advanced, at least according to Rockomax's marketing department. The box it comes in is pretty cool, in any case.
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| − | |manufacturer=RMC}}
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| − | == Usage ==
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| − | The Spark is a [[Radial size|size 0]] engine, typically placed on the bottom of a stage. Its specific impulse and thrust-to-weight ratio are similar to the [[LV-T45 "Swivel" Liquid Fuel Engine]], and it can be used to serve a similar function. However, its unique size and mass make it a good upper stage engine; it has a reasonable specific impulse, and a low mass. By using a Spark instead of a heavier [[LV-909 "Terrier" Liquid Fuel Engine]], a vessel's reduced dry mass may allow for greater delta-V.
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| − | The [[24-77 "Twitch" Liquid Fuel Engine]] is the radial variant of the Spark. The Spark has greater thrust and efficiency, but is heavier and cannot be radially mounted.
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| − | == Variants ==
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| − | As of {{version|1.6}} this engine has three models that can be switched in the editor.
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| − | {{multiple image
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| − | |align=left
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| − | |width=200
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| − | |image1=48-7S_Shroud.png
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| − | |alt1=Shroud variant
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| − | |image2=48-7S_TrussMount.png
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| − | |alt2=TrussMount variant
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| − | |image3=48-7S_Bare.png
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| − | |alt3=Bare variant
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| − | |footer=The different variants of the engine
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| − | }}
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| − | {{clear|left}}
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| − | == Trivia ==
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| − | * The 48-7S "Spark" Liquid Fuel Engine was originally from the KSPX parts mod.
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| − | * Prior to {{version|1.7}}, due to its relatively high Isp and thrust to weight ratio, the 48-7S was remarkably capable in ascent, transfer, and lander roles and had a thrust to weight ratio second only to the [[Kerbodyne KR-2L Advanced Engine]] and the [[S3 KS-25x4 Engine Cluster]].
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| − | == Changes ==
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| − | ;[[1.7.1]]
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| − | * Atmospheric Isp increased from 260 to 265
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| − | ;[[1.7]]
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| − | * Mass increased from 0.1 to 0.13
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| − | * Atmospheric Isp decreased from 270 to 260
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| − | ;[[1.6]]
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| − | * New model and texture
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| − | * Added 3 variants
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| − | ;[[1.2]]
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| − | * Thrust increased to 20 kN and 320 specific impulse in vacuum.
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| − | * Cost increased from 200 to 240.
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| − | ;[[1.0]]
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| − | * Thrust decreased to 18kN.
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| − | ;[[0.22]]
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| − | * Thrust increased from 20 to 30 kN, description changed.
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| − | ;[[0.21]]
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| − | * Initial release
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| − | {{Parts}}
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| − | [[Category:Liquid fuel engines]]
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