We enable the satellites
that enable the whole world to connect.

An engine for every constellation.

Apollo Constellation Engine (ACE)

An electric propulsion system with a revolutionary propellant and best in class performance at a fraction of the size.

Apollo Xenon Engine (AXE)

JPL designed Hall thruster licensed to Apollo with magnetic shielding for up to 2 MN-s total impulse.

400 W INPUT POWER 1000 W
24 mN THRUST 55 mN
1,250 s SPECIFIC IMPULSE 1,940 s
Proprietary PROPELLANTS Multiple
4.5 kg DRY MASS (SYSTEM) 15 kg
2019 FLIGHT READY 2020

A complete integrated system

Compact thruster

ACE and AXE include Hall effect thrusters with best in class performance at a fraction of the size. Each thruster leverages the past 50 years of Hall thruster research in a clean sheet design with major innovations.

Rad hardened PPU

The Apollo PPU (Power Processing Unit) is radiation hardened by design, replacing failure-prone microprocessors with simple and reliable components. It's single circuit board design is 95% efficient.

DOT certified tank

ACE tanks are sized to fit the unique requirements of each customer mission. The tanks are designed and manufactured by Apollo to meet DOT, ODAR, system integrator, and launch range requirements.

Extremely mass and volume efficient

Very compact

The ACE thruster is the size of a soda can, and the system is a 3x improvement for compact propulsion systems.

Very light

At 4.5 kg dry mass, the ACE system offers 3x better total impulse per mass compared to other flight systems.

Impulse per system volume, N-s/L
250kg sat, 500m/s delta-V, 1 thruster, with propellant.
Blue bars represent competitive systems.

Tested to meet or exceed all customer requirements

Apollo and our suppliers are completing qualification testing in line with ESA, MIL, and ISO standards. Test flow plans, test order, test procedures, and test levels are set to meet or exceed the performance, physical, electrical, environmental, thermal, and radiation requirements set by customer agreements. Learn more

High volume, high reliability acceptance testing facilities

Apollo's research and development lab has five vacuum chambers and one thermal-vac chamber, allowing for hundreds of tests per week. This has enabled the development of new system designs in weeks instead of years. These facilities are fault-tolerant by design and able to grow to enable acceptance testing of hundreds of systems per month. Learn more

Manufactured in the US and available in Q3 2019

Apollo has partnered with a high-volume aerospace manufacturing partner based in Silicon Valley. Apollo’s manufacturing partner specializes in high reliability aerospace and defense products and has the capacity to produce hundreds of units per month to Apollo Fusion customer specifications. Learn more

  • Manufacturing partner is ISO9001, AS9100 certified
  • Manufacturing process based on statistical process control
  • Apollo has offices on-site at manufacturing partner facilities