Whipple Standoff Structure
Strut-Maintained Standoff Between Bumper and Wall
The Whipple standoff structure is a mechanical assembly of carbon-fiber tube struts and aluminum end fittings that maintains a critical 10 to 30 cm gap, nominally 15 cm, between an outer bumper and an inner wall. This spacing preserves the fragment-cloud dispersion distance dictated by the Whipple equation. On the lunar surface, severe thermal cycling drives strut design, requiring thermal expansion mounts and an arrangement of eight struts per panel to accommodate extreme temperature swings. This configuration prevents the bumper from sagging under thermal loads while maintaining structural alignment across a 50-year operational lifetime.
Standoff struts maintaining the critical gap between outer bumper and inner wall, preserving fragment-cloud dispersion distance.
Purpose
Standoff struts maintaining the critical gap between outer bumper and inner wall, preserving fragment-cloud dispersion distance.
Context
Child of L2-MMD-WHIP within the Lunar Ark system
Principles
- ▸Standoff struts of carbon-fiber tube maintain 10-30 cm gap
- ▸Gap critical for fragment-cloud dispersion (per Whipple equation)
- ▸Strut spacing prevents bumper sagging under thermal loads
- ▸Thermal expansion mount accommodates temperature swings
- ▸Modular bays for L1-MNT replacement
Typical implementations
- ▸ISS Whipple bay heritage
- ▸Aerospace standoff design
- ▸Lunar SWS gap maintenance
Lunar considerations
- ▸Lunar thermal cycling drives strut design
- ▸Standoff inspection via L3-MMD-DET
- ▸Replaceable bay design
Specifications
Functional
| primary function | Standoff struts maintaining the critical gap between outer bumper and inner wall, preserving fragment-cloud dispersion distance. |
| standoff cm | 15 |
| struts per panel | 8 |
Physical
| mass kg | 50 |
| materials | Carbon-fiber tube struts, Aluminum end fittings |
| vacuum compatibility | True |
Operational
| power consumption w | 0 |
| thermal range c | -40, 70 |
| lifetime years | 50 |
| mtbf hours | 1000000 |
Interfaces
Provides
- Standoff for outer bumper
Requires
- Foundation anchorage
Cite this entry
Lunar Ark Codex. "Whipple Standoff Structure" (L3-MMD-WHIP-GAP). Retrieved 10 September 2026, from https://lunarark.com/entry/L3-MMD-WHIP-GAP
Licensed CC-BY-SA 4.0. You may reuse and adapt this entry with attribution, under the same licence.