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Greenlaunch is a company attempting to use a type of space gun to launch payloads into

Founded 📆2018
Founder 👔
Headquarters 🏙️California
Area served 🗺️
Key people
John Hunter Eric Robinson
Number of employees
🌐 Website[1]
📇 Address
📞 telephone

low Earth orbit. It is a private company spinoff of QuickLaunch, itself a successor to SHARP.[1]

GreenLaunch System[edit]

GreenLaunch proposes building an impulse launch system powered by a pressurized Hydrogen and Helium mix. Unlike previously tested space gun concepts, a mixture of pressurized Hydrogen and Helium could provide advantages in firing where more traditional propellants have failed.[2] Using a solid rocket booster second stage contained within the projectile, GreenLaunch aims to achieve orbit. GreenLaunch intends to eventually fire a projectile at Mach 20.[3] Unlike many traditional rocket propellants, the only byproduct of burnign hydrogen is water, potentially allowing the GreenLaunch system to be carbon neutral.[4]

Successful Firings[edit]

On December 21, 2021, GreenLaunch Successfully fired their first 54 foot prototype hydrogen impulse launcher at Yuma Proving Grounds. The projectile reached an altitude above 30,000 meters and experienced for 80,000 G's at launch.[5][6] h


  1. "Hypersonic space cannon promises 10 minutes from ground to orbit". New Atlas. 2022-04-14. Retrieved 2023-10-10.
  2. "Private company tests ballistic orbital space access, new propellant at U.S. Army Yuma Proving Ground". DVIDS. Retrieved 2023-10-10.
  3. Young, Chris (2023-02-02). "Space cannon could fire payloads to orbit in 10 minutes at Mach 20". Retrieved 2023-10-10.
  4. "U.S. Army Yuma Proving Ground helps private industry customer reach new heights". DVIDS. Retrieved 2023-10-10.
  5. Green Launch Vertical Firing Dec 21, 2021, retrieved 2023-10-06
  6. "First Vertical Light-Gas Launch for Space Access by Green Launch". 2022-01-13. Retrieved 2023-10-06.

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