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CR-7 R.A.P.I.E.R. Engine

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CR-7 R.A.P.I.E.R. Engine
Part image
Hybrid engine by
C7 Aerospace Division and Rockomax Conglomerate
Radial size Small
Cost (total) 6 000.00 Fund
Mass (total) 2.00 t
Drag 0.2
Max. Temp. 2000 K
Impact Tolerance 20 m/s
Research Aerospace Tech
Unlock cost 35000 Fund
Since version 0.23
Part configuration rapierEngine
On the surface ✓ Yes
On the ocean ✓ Yes
In atmosphere ✓ Yes
In space ✓ Yes
Test by staging ✓ Yes
Manually testable ✓ Yes
Liquid fuel engine
Maximum thrust (1 atm) 162.30 kN
(vacuum) 180.00 kN
Isp (1 atm) 275 s
(vacuum) 305 s
Fuel con­sumption 12.02 units of fuel/s
Thrust vectoring 3 °
Jet engine
Maximum thrust 140 kN
Isp (max) 6400 s
Fuel con­sumption 0.03 units of fuel/s
Intake air consumption 0.42 Air unit/s
Thrust vectoring 3 °

The R.A.P.I.E.R. Engine (Reactive Alternate-Propellent Intelligent Engine for Rockets) is a hybrid engine. It can change between an airbreathing jet and a liquid fuel engine. It has the feature to auto adjust, changing between jet and rocket mode automatically when it runs out of intake air. This engine is an in-game counterpart of the real life SABRE engine, which is also visible in the naming as both are named after swords.

This is the first stock engine which has multiple engines incorporated into one part (four in this case).

This is the first engine which has two different manufacturers. Prior to 0.24 one of the manufacturers seems to be misspelled. Instead of Rockomax Conglomerate an o was missing attributing it to the Rockmax Conglomerate. However, the description text used the common spelling and the manufacturer entry was fixed in 0.24.

Usage

This engine has two modes of operation. An AirBreathing mode in which it runs on liquid fuel and intake air like a jet engine and a ClosedCycle mode in which it runs on liquid fuel and oxidizer like a rocket engine. The air-breathing mode is far more fuel-efficient and delivers slightly more thrust, but just like normal jet engines it only works in the atmospheres of Kerbin or Laythe.

The engine can either be set to switch automatically to closed-cycle when the intake air runs out or it can be switched manually between the two modes.

The hybrid feature makes this engine especially useful for single-stage-to-orbit designs. The engine has less efficiency than comparable jet or rocket engines, but because it can switch between modes, it may be a better choice than a Toroidal Aerospike Rocket for orbital insertion. This engine is one of the few engines that do not provide electric charge when active, another example being the LV-909 engine.

The R.A.P.I.E.R Engine has a very low maximum specific impulse in its air breathing mode compared to other jet engines. It is not an optimal choice for long range cruising type jets. It has a high specific impulse in rocket mode however.

Product description

The R.A.P.I.E.R. (Reactive Alternate-Propellant Intelligent Engine for Rockets) is a joint venture between C7 Aerospace and the Rockomax Conglomerate. Designed to fill a gap in the design requirements for sustainable single stage to orbit aircraft, this engine combines the best of rocket and air-breathing thrust technology.

Changes

0.24
  • Cost decreased from 5900 to 3600 (and made meaningful), manufacturer name fixed, mass decreased from 1.75 to 1.2
0.23
  • Initial release
Default parts
Jet engines J-33 "Wheesley" Basic Jet EngineJ-X4 "Whiplash" Turbo Ramjet EngineCR-7 R.A.P.I.E.R. Engine
Liquid fuel tanks Oscar-B Fuel TankROUND-8 Toroidal Fuel TankFL-T100 Fuel TankFL-T200 Fuel TankFL-T400 Fuel TankFL-T800 Fuel TankRockomax X200-8 Fuel TankRockomax X200-16 Fuel TankRockomax X200-32 Fuel TankRockomax Jumbo-64 Fuel TankKerbodyne S3-3600 TankKerbodyne S3-7200 TankKerbodyne S3-14400 TankC7 Brand Adapter - 2.5m to 1.25mC7 Brand Adapter Slanted - 2.5m to 1.25mNCS Adapter
Liquid fuel engines LV-1 "Ant" Liquid Fuel EngineLV-1R "Spider" Liquid Fuel Engine24-77 "Twitch" Liquid Fuel Engine48-7S "Spark" Liquid Fuel EngineMk-55 "Thud" Liquid Fuel EngineT-1 Toroidal "Aerospike" Liquid Fuel EngineLV-N "Nerv" Atomic Rocket MotorLV-909 "Terrier" Liquid Fuel EngineLV-T45 "Swivel" Liquid Fuel EngineLV-T30 "Reliant" Liquid Fuel EngineRE-L10 "Poodle" Liquid Fuel EngineRE-I5 "Skipper" Liquid Fuel EngineRE-M3 "Mainsail" Liquid EngineKerbodyne KR-2L+ "Rhino" Liquid Fuel EngineLFB KR-1x2 "Twin-Boar" Liquid Fuel EngineS3 KS-25x4 "Mammoth" Liquid Fuel Engine
Solid fuel rockets Sepratron IRT-5 "Flea" Solid Fuel BoosterRT-10 "Hammer" Solid Fuel BoosterBACC "Thumper" Solid Fuel BoosterS1 SRB-KD25k "Kickback" Solid Fuel Booster
Monopropellant fuel tanks Stratus-V Cylindrified Monopropellant TankStratus-V Roundified Monopropellant TankFL-R1 RCS Fuel TankFL-R10 RCS Fuel TankFL-R25 RCS Fuel TankMk2 Monopropellant TankMk3 Monopropellant Tank
Monopropellant engines O-10 "Puff" MonoPropellant Fuel Engine
Jet fuselages Mk1 Liquid Fuel FuselageMk2 to 1.25m AdapterMk2 to 1.25m Adapter LongMk2 Liquid Fuel FuselageMk2 Liquid Fuel Fuselage ShortMk2 Rocket Fuel FuselageMk2 Rocket Fuel Fuselage ShortMk2 Bicoupler2.5m to Mk2 AdapterMk3 to 2.5m AdapterMk3 to 2.5m Adapter SlantedMk3 to 3.75m AdapterMk3 to Mk2 AdapterMk3 Liquid Fuel FuselageMk3 Liquid Fuel Fuselage ShortMk3 Liquid Fuel Fuselage LongMk3 Rocket Fuel FuselageMk3 Rocket Fuel Fuselage ShortMk3 Rocket Fuel Fuselage Long
Fuel transfer FTX-2 External Fuel Duct
Xenon propulsion IX-6315 "Dawn" Electric Propulsion SystemPB-X50R Xenon ContainerPB-X150 Xenon ContainerPB-X750 Xenon Container
Ore storage Small Holding TankLarge Holding Tank
Landing gear LY-10 Small Landing GearLY-50 Medium Landing GearLY-99 Large Landing GearLY05 Steerable Landing GearLY-01 Fixed Landing GearLT-05 Micro Landing StrutLT-1 Landing StrutsLT-2 Landing Strut
Parachutes Mk2-R Radial-Mount ParachuteMk16 ParachuteMk16-XL ParachuteMk25 ParachuteLaunch Escape SystemMk12-R Radial-Mount Drogue Chute
Ladders Pegasus I Mobility EnhancerTelus Mobility EnhancerTelus-LV Bay Mobility Enhancer
Powered wheels RoveMax Model M1RoveMax Model S2RoveMax Model XL3TR-2L Ruggedized Vehicular Wheel
Generators PB-NUK Radioisotope Thermoelectric GeneratorOX-STAT Photovoltaic PanelsGigantor XL Solar ArrayOX-4W 3x2 Photovoltaic PanelsOX-4L 1x6 Photovoltaic PanelsSP-W 3x2 Photovoltaic PanelsSP-L 1x6 Photovoltaic PanelsFuel CellFuel Cell Array
Batteries Z-100 Rechargeable Battery PackZ-400 Rechargeable BatteryZ-200 Rechargeable Battery BankZ-1k Rechargeable Battery BankZ-4K Rechargeable Battery Bank
Lamps Illuminator Mk1Illuminator Mk2
Space station parts Clamp-O-Tron Jr.Clamp-O-Tron Docking PortClamp-O-Tron Shielded Docking PortClamp-O-Tron Sr. Docking PortInline Clamp-O-TronAdvanced Grabbing UnitPPD-10 Hitchhiker Storage ContainerMk2 Crew CabinMk3 Passenger Module
Cargo bays Mk2 Cargo Bay CRG-04Mk2 Cargo Bay CRG-08Mk3 Cargo Bay CRG-25Mk3 Cargo Bay CRG-50Mk3 Cargo Bay CRG-100Service Bay (1.25m)Service Bay (2.5m)
Ore processing 'Drill-O-Matic' Mining ExcavatorISRU Converter