INSIGHTS / PURE CLIENT

Oxygen, hardware, and the data gap

A structural view of the curated catalog: where oxygen conditions sit, which hardware family produced what, and what NASA has not measured yet.

Partial-gravity data gap

No partial-gravity combustion data exists in PSI yet. Future experiments LUCI (Lunar-g Combustion Investigation) and FM2 (Flammability of Materials on the Moon) will address it. Microgravity and normal-gravity results bound intermediate-gravity behavior. Rocket and propellant fire safety is out of scope.

Oxygen concentration across the catalog

Each marker is the highest documented test O2 concentration for that investigation. Reference lines mark Earth air, the likely lunar-base floor, and the CFI-G maximum.

21% to 85% documented

21% Earth air30% Lunar base floor85% CFI-G max

02040608010021%30%85%

Cool Flames Investigation with Gases (CFI-G)

85%

Flame Extinguishment Experiment (FLEX)

50%

Burning and Suppression of Solids (BASS)

21%

Smoke Point in Co-flow Experiment (SPICE)

21%

Structure & Liftoff in Combustion Experiment (SLICE)

21%

Varied oxygen or not specified in the curated record:

Burning and Suppression of Solids - II Saffire-I Saffire-II Saffire-III Smoke Aerosol Measurement Experiment Smoke Aerosol Measurement Experiment - Reflight Dust and Aerosol Measurement Feasibility Test Dust and Aerosol Measurement Feasibility Test - 2 Flame Extinguishment Experiment - 2 Cool Flames Investigation Advanced Combustion via Microgravity Experiments

The single value is a documented test condition, not a measured flammability limit. Many investigations varied O2 across a range; see each record's variables tested.

Catalog coverage

Counts overlap: one investigation can serve several pillars, fuels or environments.

BY PILLAR

Prevention

Detection

Suppression

BY FUEL PHASE

Solid

Liquid

Gaseous

No fuel

BY TARGET ENVIRONMENT

Spacecraft cabin

Space station

Lunar base

Mars base

Pressurized rover

Spacesuit

HARDWARE MAP

Three families, plus the free-flyers

Filter the catalog

Combustion Integrated Rack (CIR)

ACME group

Modular ACME hardware for laminar gaseous non-premixed flames. Six sub-experiments share one chamber insert, burner set and imaging suite.

Advanced Combustion via Microgravity Experiments Cool Flames Investigation with Gases

Six ACME sub-experiments: BRE / CLD Flame / E-FIELD Flames / Flame Design / s-Flame / CFI-G. BRE emulates condensed-fuel burning with a flat porous gas burner.

2 catalog records

Combustion Integrated Rack (CIR)

MDCA group

Multi-user Droplet Combustion Apparatus for liquid fuel droplets. FLEX, FLEX-2 and CFI use the same droplet deployment, ignition and imaging capability.

Flame Extinguishment Experiment Flame Extinguishment Experiment - 2 Cool Flames Investigation

3 catalog records

Microgravity Science Glovebox (MSG)

SPICE duct group

The modular fan-driven flow duct built for SPICE. BASS, BASS-II, SPICE and SLICE all use the same MSG duct hardware.

Burning and Suppression of Solids Burning and Suppression of Solids - II Smoke Point in Co-flow Experiment Structure & Liftoff in Combustion Experiment

4 catalog records

Ungrouped records

Saffire I-III fly on free-flying Cygnus vehicles. Detection investigations use dedicated MSG or cabin hardware.

Saffire-I Saffire-II Saffire-III Smoke Aerosol Measurement Experiment Smoke Aerosol Measurement Experiment - Reflight Dust and Aerosol Measurement Feasibility Test Dust and Aerosol Measurement Feasibility Test - 2

Built only from the curated catalog and public NASA/PSI summaries. No partial-gravity combustion data exists in PSI yet; LUCI and FM2 are the expected additions. Rocket and propellant fire safety is out of scope.