Radiator Deployment Mechanism
Motorized Radiator Panel Deployment and Retraction System
A radiator deployment mechanism is a motorized assembly that unfolds, positions, and retracts thermal control panels to modulate heat rejection against solar input. Utilizing stepper motor-driven scissor mechanisms, maraging steel springs, and titanium hinge pins lubricated with molybdenum disulfide, the system alters panel surface area according to thermal load. Operating on the Moon is complicated by fine dust that fouls exposed mechanical joints, requiring sealed housings, and by thermal distortion loads that necessitate rigid locking latches. Furthermore, the mechanism must reliably execute panel deployment or variable-angle adjustments even after enduring decades of storage in lunar conditions.
Mechanism for deploying radiator panels from stowed position and retracting if needed
Purpose
Enable radiator area to be adjusted based on thermal load and protect panels when not needed
Context
Child of L2-TCS-RAD in the Active Thermal Control System
Principles
- ▸Spring-loaded hinge mechanisms provide reliable one-time deployment with motor override
- ▸Stepper motor-driven scissor mechanisms allow variable deployment angle
- ▸Deployment latches lock panels in deployed position against thermal distortion loads
Typical implementations
- ▸ISS radiator wing deployment mechanisms
- ▸Hubble Space Telescope solar array deployment
- ▸OneWeb satellite radiator deployment mechanisms
Lunar considerations
- ▸Deployment mechanisms must function after decades of storage in lunar conditions
- ▸Dust on mechanism joints may impede deployment - sealed mechanisms preferred
- ▸Variable deployment angle could optimize thermal rejection vs solar input ratio
- ▸Robotic assistance may be needed if primary deployment mechanism fails
Specifications
Functional
| primary function | Mechanism for deploying radiator panels from stowed position and retracting if needed |
Physical
| materials | Titanium hinge pins, MoS2 dry lubricant, Maraging steel springs, Stepper motors |
Interfaces
Provides
- Panel positioning and structural support
Requires
- Deployment commands and position feedback
Cite this entry
Lunar Ark Codex. "Radiator Deployment Mechanism" (L3-TCS-RAD-DEPL). Retrieved 10 September 2026, from https://lunarark.com/entry/L3-TCS-RAD-DEPL
Licensed CC-BY-SA 4.0. You may reuse and adapt this entry with attribution, under the same licence.