Power and Propulsion Element

Power and Propulsion Element
Artist's impression of the PPE, attached to HALO, firing its engines in lunar orbit.
NamesPPE
Asteroid Redirect Vehicle
Mission typePower and propulsion module
OperatorNorthrop Grumman / NASA
Mission duration15 years (planned)
Spacecraft properties
SpacecraftPPE
ManufacturerMaxar Technologies
Launch mass5,000 kg (11,000 lb) [1]
Power60 kW
Start of mission
Launch date2027 (planned)[2]
RocketFalcon Heavy
Launch siteKennedy Space Center, LC-39A
ContractorSpaceX
HALO →

The Power and Propulsion Element (PPE), previously known as the Asteroid Redirect Vehicle propulsion system, is a planned solar electric ion propulsion module being developed by Maxar Technologies for NASA. It is one of the major components of the Lunar Gateway. The PPE will allow access to the entire lunar surface and a wide range of lunar orbits and double as a space tug for visiting craft.[3][4]

The PPE originally started development at the Jet Propulsion Laboratory as a part of the now cancelled Asteroid Redirect Mission, but is now led and managed by the NASA John H. Glenn Research Center, in Cleveland, Ohio. When ARM was cancelled, the solar electric propulsion was repurposed as the PPE for the Gateway.[5][6] The PPE is designed to be able to transfer the reusable Gateway to lunar orbit.[4] It will also serve as the communications center of the Gateway.[7] The PPE is intended to have a launch mass of 5,000 kg (11,000 lb) with propellant accounting for half that mass [1] and the capability to generate 50 kW [8] of solar electric power using Roll Out Solar Arrays for its Hall-effect thrusters, which can be supplemented by chemical propulsion.[9] It is currently planned to launch on a Falcon Heavy no earlier than 2027 along with the HALO module.[2][10]

  1. ^ a b Boyle, Alan (23 May 2019). "NASA says Maxar will build the first big piece for Gateway station in lunar orbit". GeekWire. Retrieved 28 August 2023.
  2. ^ a b "Artemis Programs: NASA Should Document and Communicate Plans to Address Gateway's Mass Risk". GAO. 31 July 2024. Retrieved 31 July 2024.
  3. ^ "NASA Awards Artemis Contract for lunar Gateway Power, Propulsion" (Press release). NASA. 23 May 2019. Archived from the original on 20 September 2019. Retrieved 11 December 2019. Public Domain This article incorporates text from this source, which is in the public domain.
  4. ^ a b "Deep Space Gateway and Transport: Concepts for Mars, Moon Exploration Unveiled". Science News. 4 April 2017. Archived from the original on 30 May 2019. Retrieved 30 May 2019.
  5. ^ "NASA closing out Asteroid Redirect Mission". SpaceNews. 14 June 2017. Retrieved 30 May 2019.
  6. ^ "Asteroid Redirect Robotic Mission". jpl.nasa.gov. NASA. Archived from the original on 30 May 2019. Retrieved 30 May 2019. Public Domain This article incorporates text from this source, which is in the public domain.
  7. ^ Clark, Stephen. "NASA chooses Maxar to build keystone module for lunar Gateway station". Spaceflight Now. Archived from the original on 5 June 2019. Retrieved 30 May 2019.
  8. ^ Foust, Jeff (3 November 2017). "NASA issues study contracts for Deep Space Gateway element". SpaceNews. Retrieved 11 December 2019.
  9. ^ Chris Gebhardt (6 April 2017). "NASA finally sets goals, missions for SLS – eyes multi-step plan to Mars". NASASpaceFlight.com. Archived from the original on 21 August 2017. Retrieved 9 April 2017.
  10. ^ Dunbar, Brian (18 December 2023). "Gateway". NASA. Retrieved 25 December 2023.

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