Recorded test events
0+
Hybrid Rocket Engine
Helios
Operating peak thrust
0LBF
Operating impulse
0LBF·S
Static engine tests
0
Cold flow tests
0
Engine overview
Helios was SRT’s second engine design and was developed in two major versions distinguished by oxidizer-flow control and injector design. Its flow-control hardware was designed to interchange with the Icarus system. Helios used a lightweight composite tank, custom ball-valve actuation on Version II, a removable coin injector, and a cubic graphite nozzle.
Program record
Archive- Vehicle
- Phoenix
- Designed
- SRT-22014–2015
- Built
- SRT-22014–2015
- Modified
- SRT-32015–2016
- SRT-42016–2017
Engine record
Configuration
- Versions
- I & II
- Vehicle
- Phoenix
- Engine type
- Hybrid
- Oxidizer
- Nitrous Oxide (N2O)
- Fuel
- Version I: Nylon 6/6
- Version II: Hydroxyl-terminated polybutadiene (HTPB)
- Pressurization method
- Self-pressurized
- Injection method
- Impinging Injection
- Axial Injection
Performance
Operating record
- Operating peak thrust
- 350 lbf
- Operating impulse
- 2281 lbf-sec
Verification
Test record
- Hydrostatic tests
- 10+
- Cold flow tests
- 5
- Static engine tests
- 5