Curie (rocket engine)

Curie
Country of originNew Zealand
First flight21 January 2018 (21 January 2018)
DesignerRocket Lab
ManufacturerRocket Lab
ApplicationUpper/kick stage
StatusIn production
Liquid-fuel engine
PropellantUnknown bipropellant
CyclePressure-fed engine
Configuration
Chamber1
Performance
Thrust, vacuum120 N (27 lbf)[1]
Restartsmultiple
Used in

Curie is a liquid-propellant rocket engine designed and manufactured by Rocket Lab. A bipropellant is used for the propulsion of the third stage/kick stage of the Electron rocket, as well as the Photon.[2] The composition of the propellant is a trade secret.

The kick stage rocket produces 120 newtons (27 lbf) of thrust, and has a specific impulse of approximately 320 seconds.[3]

It was first used on 21 January 2018 during Rocket Lab's first successful orbital rocket launch, and helped to boost two small CubeSats, the weather and ship-tracking Lemur-2 CubeSats built by the company Spire Global, into a circular orbit.

Description

The Curie engine, named after Polish scientist Marie Skłodowska–Curie, is a small liquid-propellant rocket engine designed to release "small satellites from the constricting parameters of primary payload orbits and enables them to fully reach their potential, including faster deployment of small satellite constellations and better positioning for Earth imaging".[3] It is 3D printed.[4]

Monopropellant version

The Electron third stage, which is powered by Curie, is equipped with its own reaction control system, avionics, power, and communication systems.[4] During the first flight in January 2018 where Curie was tested, the Electron third stage—also referred to as the "kick stage"—coasted for roughly 40 minutes after successfully deploying an Earth-imaging Dove satellite built by the company Planet Labs, then ignited the Curie engine on its first in-space test.[4] After this test, the stage was left in orbit. However, Rocket Lab stated that future launches would have the stage deorbited after releasing their payloads to prevent addition to space debris.[5]

While Rocket Lab is not known to have specified the monopropellant used by Curie, in 2012 Rocket Lab demonstrated the use of a non-toxic Viscous Liquid Monopropellant (VLM) that it had developed.[6]

Bi-propellant version

In August 2020 Rocket Lab indicated that the kick stage uses an unspecified liquid bi-propellant fuel for the Curie engine.[1]

HyperCurie

Rocket Lab has also developed a version of the Curie engine with more thrust called HyperCurie.[7] While Curie is pressure-fed, HyperCurie is electric pump-fed.[8] The engine was used on the CAPSTONE lunar mission that launched in June 2022.[9] HyperCurie is set to be used on the upcoming Photon mission to Venus, Venus Life Finder.[10]

See also

References

  1. ^ a b "Rocket Lab Launch Payload Users Guide 6.5" (PDF). Rocket Lab. August 2020.
  2. ^ "Photon". Rocket Lab. Archived from the original on 4 June 2019. Retrieved 12 May 2019.
  3. ^ a b "Rocket Lab successfully circularizes orbit with new Electron kick stage". Rocket Lab. 23 January 2018. Retrieved 23 January 2018.
  4. ^ a b c Bennett, Jay (23 January 2018). "Rocket Lab Reveals Secret Engine and "Kick Stage" for the Electron Rocket". Popular Mechanics. Retrieved 23 January 2018.
  5. ^ Clark, Stephen (29 January 2018). "Rocket Lab's test launch carried two previously-unannounced passengers". Spaceflight Now. Retrieved 30 January 2018.
  6. ^ Richard Chirgwin (19 November 2012). "Kiwis demo DARPA-funded rocket project". theregister.com. Retrieved 19 March 2023.
  7. ^ Grush, Loren (2020-06-17). "How small launcher Rocket Lab plans to pull off its first mission to the Moon next year". The Verge. Retrieved 2020-08-13.
  8. ^ Etherington, Darrell (13 May 2020). "Rocket Lab tests new hyperCurie engine that will power its deep space delivery vehicle". Retrieved 22 June 2024.
  9. ^ "Next Mission: CAPSTONE". Rocket Lab. 14 June 2022. Archived from the original on 2 June 2022. Retrieved 26 June 2022.
  10. ^ "Bringing Deep Space Missions Within Reach for Small Spacecraft". digitalcommons. Retrieved 16 November 2023.

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