Atlas / PMMA film · opposed flow
BASS-II test B1
100-µm PMMA film, 2 cm wide, opposed flow, microgravity (ISS, Microgravity Science Glovebox). Principal investigator: Bhattacharjee. Listed date 2014-02-19
Extinguished after flow was turned off
Conditions and sample
- Oxygen
- 20.6 % by volumeRecorded for this testTaken from NASA's 'Calibrated initial O2 vol%' column.
- Airflow as recorded
- 5Recorded for this test
- Starting airflow
- 5 cm/sDerived by MicroFire AtlasFirst value of the 'Air display' column (air velocity transducer, cm/s). Later 'pot' values are fan potentiometer settings, not velocities, and are not converted.
- Pressure
- 99.2–99.5 kPaStated for the whole test series: “The total pressure is also monitored, which varied from 99.2 to 99.5 kPa in the tests reported.” BASS-II Summary Report, §2.3.5, PDF p. 46Series-level range from the Bhattacharjee report section; not a per-test reading.
- Thickness
- 0.1 mmRecorded for this test
- Width
- 20 mmRecorded for this test
- Exposed length
- Not statedNot stated in the source
- Outcome code
- Extinguished after flow was turned offDerived by MicroFire AtlasCoded by MicroFire Atlas from the verbatim observations column.
What the crew and ground team wrote
“Ignited very quickly, turned flow off after spread halfway; flame extinguished very quickly; and sooty with blue leading edge”
Gas readings before and after the burn
| Initial | Final | |
|---|---|---|
| O₂, vol % | 20.6 | 20.6 |
| CO₂, vol % | 0.44 | 0.44 |
| CO, ppm | 0 | 6 |
Readings of the glovebox work volume, from NASA's table columns. They describe the enclosure, not the flame.