Cygnus to depart ISS, then start a fire
A fire in space: Orbital ATK’s Cygnus capsule is scheduled to leave ISS on Tuesday, when shortly thereafter it will begin a controlled fire experiment.
“Saffire-I provides a new way to study a realistic fire on a spacecraft. This hasn’t been possible in the past because the risks for performing such studies on crewed spacecraft are too high. Instruments on the returning Cygnus will measure flame growth, oxygen use and more. Results could determine microgravity flammability limits for several spacecraft materials, help to validate NASA’s material selection criteria, and help scientists understand how microgravity and limited oxygen affect flame size. The investigation is crucial for the safety of current and future space missions. – See more at: http://www.space.com/17933-nasa-television-webcasts-live-space-tv.html#sthash.2DjFjJqY.dpuf
The departure is scheduled for 9 am (eastern), and will aired live by NASA.
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A fire in space: Orbital ATK’s Cygnus capsule is scheduled to leave ISS on Tuesday, when shortly thereafter it will begin a controlled fire experiment.
“Saffire-I provides a new way to study a realistic fire on a spacecraft. This hasn’t been possible in the past because the risks for performing such studies on crewed spacecraft are too high. Instruments on the returning Cygnus will measure flame growth, oxygen use and more. Results could determine microgravity flammability limits for several spacecraft materials, help to validate NASA’s material selection criteria, and help scientists understand how microgravity and limited oxygen affect flame size. The investigation is crucial for the safety of current and future space missions. – See more at: http://www.space.com/17933-nasa-television-webcasts-live-space-tv.html#sthash.2DjFjJqY.dpuf
The departure is scheduled for 9 am (eastern), and will aired live by NASA.
Readers!
Please consider supporting my work here at Behind the Black. Your support allows me the freedom and ability to analyze objectively the ongoing renaissance in space, as well as the cultural changes -- for good or ill -- that are happening across America. Fourteen years ago I wrote that SLS and Orion were a bad ideas, a waste of money, would be years behind schedule, and better replaced by commercial private enterprise. Only now does it appear that Washington might finally recognize this reality.
In 2020 when the world panicked over COVID I wrote that the panic was unnecessary, that the virus was apparently simply a variation of the flu, that masks were not simply pointless but if worn incorrectly were a health threat, that the lockdowns were a disaster and did nothing to stop the spread of COVID. Only in the past year have some of our so-called experts in the health field have begun to recognize these facts.
Your help allows me to do this kind of intelligent analysis. I take no advertising or sponsors, so my reporting isn't influenced by donations by established space or drug companies. Instead, I rely entirely on donations and subscriptions from my readers, which gives me the freedom to write what I think, unencumbered by outside influences.
You can support me either by giving a one-time contribution or a regular subscription. There are four ways of doing so:
1. Zelle: This is the only internet method that charges no fees. All you have to do is use the Zelle link at your internet bank and give my name and email address (zimmerman at nasw dot org). What you donate is what I get.
2. Patreon: Go to my website there and pick one of five monthly subscription amounts, or by making a one-time donation.
3. A Paypal Donation or subscription:
4. Donate by check, payable to Robert Zimmerman and mailed to
Behind The Black
c/o Robert Zimmerman
P.O.Box 1262
Cortaro, AZ 85652
You can also support me by buying one of my books, as noted in the boxes interspersed throughout the webpage or shown in the menu above.
Makes me wonder why NASA hasn’t been performing these kinds of experiments for the last 50 years.
Spacex/Musk is the reason
Cool and valuable experiment. David Cook does ask a good question.
There have been a few experiments with fire, in the past. A match was lit on the Space Shuttle. My recollection is that the match had a hemispherical flame.
This video has some nice photographs:
https://www.youtube.com/watch?v=9zdD7lfB0Fs (3 minutes)
STS 64 had a “Solid Surface Combustion Experiment (SSCE) to supply information on flame propagation over fuels in space.” My recollection is that the flame did not propagate as expected, and what little it did propagate was uneven.
Reference: http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/archives/sts-64.html
In college, my AIAA student group proposed, but did not fly, a similar Get Away Special experiment, so I have been interested in the topic for many years.
Here is a write-up on the topic:
http://engineering.mit.edu/ask/how-does-match-burn-spacecraft
“Lighting matches in a spacecraft may not seem like the brightest thing to do in light of the many as-yet-unanswered questions about how materials burn, but that’s exactly why NASA is engaged in flammability experiments. Since 2009, its Flame Extinguishment Experiment (FLEX) on board the International Space Station has explored the behavior of fire in microgravity. ‘By studying candles and flames in space, we can learn how combustion works in various conditions,’ says Johnson. ‘We know that a traditional fire extinguisher in space introduces air currents that only feed the fire and speed up the combustion process, and these studies will help us design better fire extinguishers for use in spacecraft.'”
Many unexpected and counterintuitive things happen in zero G and in space. The Cygnus experiment is yet another iteration in the learning process.
There was a fire onboard MIR, you find stories about it easily. The chemicals which absorbe CO2 caught fire when routinely deployed (as in opening a can). It took a while to put it out. One cosmonaut held another in place because the reaction force of the fire extinguisher pushed him away from the fire otherwise. And the air quality deteriorated until the filters in the ventilation system took care of it. But it is so easy to put out a fire in space, just open the window! :-)
LocalFluff,
You are close. The fire onboard MIR was not a CO2 scrubber but an O2 generator that used a flame to produce oxygen (now *that* is counterintuitive!). A faulty canister caused the flame to get out of control; my recollection is that it was a three-foot jet of flame. You are right that it was a huge problem, as the cosmonauts sent the American Astronaut into the Soyuz capsule to prepare for the possibility that they would have to abandon the station.
http://www.universetoday.com/100229/fire-how-the-mir-incident-changed-space-station-safety/
Similar O2 generators are used on airplanes, especially for emergency air for when the oxygen masks drop from overhead when pressure is lost in the cabin.
As for opening the windows, that is roughly what they did in an episode of the science fiction show “Firefly.”
Thanks for the corrections, Edward.
Opening the window might cause other hazards, but that’s covered by someone elses insurance policy!
MIR covers several near disastrous failures. A collision that caused an air leak and forced the crew to cut the main power cable in order to close a door. A powerless space station. And on one return to it after having been left alone, the air quality was dismal from mold and other stuff growing in there. Again, I don’t have the details, but MIR was much more “interesting” than the remarkably safe ISS. I think the Russians have learned alot about safety and quality control by participating with the ISS project. Funny that they managed to save every crisis, only four cosmonauts ever died in space flight, and none since 40 years. Somehow they know what they are doing, it works great.