PSI recordPSI-100Investigation dossier

SAFFIRE-III

Spacecraft Fire Experiment-III

Principal investigator: David Urban
Platform: International Space Station (ISS)
Hardware: Saffire III enclosure in Cygnus
Dates: 04-18-2017 → ?
Licence: CC0-1.0
PSI version: v4 · modified 05-Jun-2025
Publications listed: 3

PSI record (opens in a new tab)doi 10.60555/040q-4h36 (opens in a new tab)psi.nasa.gov/physci/repo/data/investigations/PSI-100

Evidence proximity, not a safety rating. This page describes what was tested and where each value comes from.

Footprint · Microgravity

Where SAFFIRE-III’s runs sit in condition space, in the Atlas chart window. Other investigations’ runs in this regime are dimmed.

0 of 2 runs drawn · 2 runs without O₂ or pressure are not drawn.

Source: NASA PSI run tables (snapshot 2026-11-14) and the published papers listed under Sources. Evidence proximity, not a safety rating; not a hazard map.

Objective

As written in the PSI record:

The objectives of this investigation were to: (1) determine how rapidly a large scale fire grows in low-gravity and (2) investigate the low-g flammability limits compared to those obtained in NASA’s normal gravity material flammability screening test.

Fingerprint COMPUTED

Computed from the 2 run rows below: what varied, what was held constant, and what was never recorded.

Varied

Sample Number · 2 values
Direction · 2 values
Camera 1 · 2 values
Camera 2 · 2 values

Held constant

Flow 30.0 cm/s · measured
Material = SIBAL Fabric
Sample Thickness = .33 cm
Sample Length = 94 cm
Sample Width = 40.6 cm
Air Flow = 30 cm/s

Not recorded

O₂ no o₂ column in the PSI table
Pressure no pressure column in the PSI table

Condition axes: what varied and what was held constant
Axis	State	Range	Basis	Recorded
O₂	not recorded	no o₂ column in the PSI table	not recorded	0/2
Pressure	not recorded	no pressure column in the PSI table	not recorded	0/2
Flow	held constant	30.0 cm/s	measured	2/2

Placeable: 0 of 2 record O₂ and can be placed (the engine can compute a distance); 0 also record pressure and appear on the charts. Not placeable: 2: no O₂ value recorded in the source row.
Gravity: Microgravity (2)
Fuel classes: Solid · thin (2)
Flow regime: concurrent flow (1) · opposed flow (1)
Materials (1): SIBAL Fabric (2)
Outcomes: not recorded (2)
Measured quantities: sample thickness [cm (as labelled)] (2)
Data-quality flags: missing × 2: At least one of O₂, pressure or flow is not recorded in the source row.
suspect-unit × 2: The unit looks inconsistent with the values.
text-parsed × 2: The number was parsed from text in the cell (for example “20 cm/s”).

Where the runs sit: O₂ × pressure, zoomed to the data

Nothing from this investigation can be placed on an O₂ × pressure chart: 2 runs: no O₂ value recorded in the source row.

Source: the normalized O₂ and pressure of each run in the run table below (NASA PSI run tables or the cited paper); the original cell and any conversion are in each run’s provenance. Reference atmospheres are MARGIN’s presets. Not a hazard map.

Run table

Normalized values with the original cell beneath each. Inspect a row for its conversions, flags, source and distance to your scenario.

SAFFIRE-III: 2 runs from PSI-100_Experimental table_SAFFIRE-3.csv.

SAFFIRE-III: 2 runs. Each value cell shows the normalized value and, beneath it, the original cell as it appears in the source.
Row	Inspect	Material	Fuel class	g	O₂ %	Pressure kPa	Flow cm/s	Outcome	Flags
1		SIBAL Fabric	Solid · thin	µg	not recorded—	not recorded—	30.0concurrent flow30 cm/s	not recorded	missing, suspect-unit, text-parsed
2		SIBAL Fabric	Solid · thin	µg	not recorded—	not recorded—	30.0opposed flow30 cm/s	not recorded	missing, suspect-unit, text-parsed

Investigation dossier

Loading dossier…

Reading the record, its runs and their sources.

SAFFIRE-III

Spacecraft Fire Experiment-III

Principal investigator

David Urban

Platform

International Space Station (ISS)

Hardware

Saffire III enclosure in Cygnus

Dates

04-18-2017 → ?

Licence

CC0-1.0

PSI version

v4 · modified 05-Jun-2025

Publications listed

Evidence proximity, not a safety rating. This page describes what was tested and where each value comes from.

Fingerprint COMPUTED

Computed from the 2 run rows below: what varied, what was held constant, and what was never recorded.

Varied

Sample Number · 2 values
Direction · 2 values
Camera 1 · 2 values
Camera 2 · 2 values

Held constant

Flow 30.0 cm/s · measured
Material = SIBAL Fabric
Sample Thickness = .33 cm
Sample Length = 94 cm
Sample Width = 40.6 cm
Air Flow = 30 cm/s

Not recorded

O₂ no o₂ column in the PSI table
Pressure no pressure column in the PSI table

Condition axes: what varied and what was held constant
Axis	State	Range	Basis	Recorded
O₂	not recorded	no o₂ column in the PSI table	not recorded	0/2
Pressure	not recorded	no pressure column in the PSI table	not recorded	0/2
Flow	held constant	30.0 cm/s	measured	2/2

Placeable

0 of 2 record O₂ and can be placed (the engine can compute a distance); 0 also record pressure and appear on the charts. Not placeable: 2: no O₂ value recorded in the source row.

Gravity

Microgravity (2)

Fuel classes

Solid · thin (2)

Flow regime

concurrent flow (1) · opposed flow (1)

Materials (1)

SIBAL Fabric (2)

Outcomes

not recorded (2)

Measured quantities

sample thickness [cm (as labelled)] (2)

Data-quality flags

missing × 2: At least one of O₂, pressure or flow is not recorded in the source row.
suspect-unit × 2: The unit looks inconsistent with the values.
text-parsed × 2: The number was parsed from text in the cell (for example “20 cm/s”).

Run table

Normalized values with the original cell beneath each. Inspect a row for its conversions, flags, source and distance to your scenario.

SAFFIRE-III: 2 runs from PSI-100_Experimental table_SAFFIRE-3.csv.

SAFFIRE-III: 2 runs. Each value cell shows the normalized value and, beneath it, the original cell as it appears in the source.
Row	Inspect	Material	Fuel class	g	O₂ %	Pressure kPa	Flow cm/s	Outcome	Flags
1		SIBAL Fabric	Solid · thin	µg	not recorded—	not recorded—	30.0concurrent flow30 cm/s	not recorded	missing, suspect-unit, text-parsed
2		SIBAL Fabric	Solid · thin	µg	not recorded—	not recorded—	30.0opposed flow30 cm/s	not recorded	missing, suspect-unit, text-parsed