Questions tagged [testing]

Questions about the procedure of using a piece of equipment to find imperfections or problems.

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4
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1answer
991 views

What is the advantage of doing a static test fire before launch?

Continuing the series of questions (part 1, part 2) inspired by the recent loss of the AMOS-6 satellite during a static test fire, here's one thing that puzzles me a bit: What kinds of problems is a ...
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Why was AMOS-6 mounted on the rocket for a test fire?

I understand that the static test is a general test of pre-launch procedures, but risking a multi-million dollar payload for a test seems remarkable. Couldn't they use a mass simulator or something? ...
26
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1answer
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Was Amos 6 insured for pre-launch operations?

The Falcon 9 rocket, complete with the Amos 6 payload, just blew up (Or RUDed) on the launch pad. I believe the standard language for most launch insurances is that it is only covered after "...
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376 views

Does every liquid-fueled rocket engine get a test run before its actual flight operation?

I'm not referring to the obvious development testing, but the life cycle of individual engines. When a rocket is launched, have those specific engine "serial numbers" been previously test-run? Like ...
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How long does it take SpaceX to mount a stage on the McGrgeor test stand, run the test, and dismount it?

Gwynne Shotwell at SmallSat 2016 in Utah mentioned that SpaceX would be using the JCSAT-14 recovered first stage as a fleet leader in wear and tear. That they would be mounting it on the McGregor, TX ...
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4answers
5k views

How does a simple construction keep a firing rocket on the ground?

Today I have seen this report of a SpaceX Falcon 9 rocket test firing. The force of a burning rocket is tremendous, and in the video we see an apparently simple construction keeping the rocket (or ...
7
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2answers
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Why doesn't this SpaceX rocket test fire use water sprays?

I know that rocket launches always have water towers spray water all around when the rocket is launching to suppress the extreme sounds and shockwaves generated by the launch and ensure the rocket ...
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Which communications satellite “fell down?” [duplicate]

I remember reading about an accident where a big, expensive communications satellite actually fell off it's mount and landed on the floor of the room where it was undergoing final assembly and ...
6
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2answers
385 views

Deluge system refresh rates

SpaceX has said they will take the recovered CRS-8 Falcon 9 first stage and test fire it 10 times at LC-39A. There is lots of discussion as to what that means. 10 full 2+ minute duration fires? 10 3 ...
5
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1answer
453 views

How would a manned Mars Lander be tested

This question just occured to me while I was setting up my first manned (err, kerbalized?) Duna mission in KSP: In order to test my basic lander design I did not want to start a whole Duna Mission but ...
5
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1answer
357 views

When SpaceX hot fired the previously used ORBCOMM OG2 first stage, why did they suddenly switch from LC-39A to LC-40?

After the successful ORBCOMM OG2 mission on a Falcon 9 v1.1 Full Thrust (aka 1.2, aka 'just' Falcon 9) and the recovery of its first stage at LZ-1, SpaceX indicated it survived well, and trucked it to ...
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2answers
3k views

How does static test firing before launch affect design of rocket mass and structure?

Some launchers, like Falcon 9 recently as in a video clip linked to below, and I think some other launchers since long ago in the space race history, test their engines before launch by firing them ...
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7answers
5k views

Why don't we put an EmDrive in space?

Once again the impossible drive is in the forefront of public news. But thus far, I am still unimpressed. NASA seems to have thrown a lot of resources, to test the viability of the EmDrive. But I am ...
5
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472 views

How can SpaceX test SuperDracos whilst hanging off a crane?

NASASpaceFlight.com reports that the DragonFly test vehicle has arrived at McGregor, TX for testing. They discuss that the FAA is limiting them to 80 feet above ground for initial testing. That they ...
11
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1answer
263 views

What is NASA doing to improve the supersonic parachute for the third LDSD test?

Last month, on June 8, 2015, NASA ran the second Low-Density Supersonic Decelerator (LDSD) flight test off the island of Kauai, Hawaii. The inflatable decelerator portion of the test was successful, ...
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3answers
1k views

What is the new horizontal test stand at SpaceX's McGregor, TX facility meant to test?

If you look on Google Maps, at the McGregor, TX test site, you can see the old test stand (Labelled A) where they test each Falcon 9 first stage for a 9 engine fire as an acceptance test before ...
7
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1answer
183 views

What Dragon was used in May 2015 Pad Abort test?

Originally it was suggested by Elon Musk that the Dragon shown at the unveiling was the test article, or at least large components of it, to be used in the Pad Abort (May 6, 2015) and then the Max ...
8
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1answer
584 views

Dragon Pad Abort hot fire, how much cleanup work was needed?

The day before the Pad Abort test attempt (May 5, 2015) SpaceX test fired the SuperDraco engines in a hot fire. Similar to how they test the Falcon 9 a day or three before launch, the engines spin up ...
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2answers
1k views

Why was Dragon sent to the isolation room?

I'm asking about this photograph that was published on SpaceX Flickr photostream, which I also noticed in a few recent articles (e.g. this one) about the upcoming Crew Dragon pad abort test: SpaceX ...
5
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1answer
350 views

Why is the SpaceX Pad Abort test starting at ground level?

I cannot find references, but prior to the Pad Abort test, for years, it was stated or implied that the test would take place from a platform at LC-40 that would simulate the height of the first stage ...
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2answers
2k views

Why does SpaceX have a launch window for a pad abort test?

SpaceX has announced a pad abort test for the Dragon crew capsule on May 5th. They have a 4 hour launch window for the test. There is no destination, so why would there be a launch window in this ...
5
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1answer
696 views

How has the Dragon v2 been tested before its launch pad abort test?

Dragon of SpaceX has been very successfully tested and used. But Dragon v2 seems to be differently designed and has 8 superdraco engines. Has the v2 been drop tested from a balloon or helicopter? ...
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953 views

What is this structure at the SpaceX McGregor, TX test site?

After an overflight of the McGregor site, in a thread at NASA Space Flight.com someone noticed an interesting structure: The theory being presented is that the size and hexagon pattern at the top ...
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1answer
223 views

How do they simulate the SLS engine environment?

I was reading an Aviation Week article about the restart of SSME (RS-25E) production for SLS. There is a paragraph in it that is interesting to me. On the SLS, the engine inlets will receive ...
9
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1answer
965 views

Why will SpaceX do Pad Abort test from a truss, not a real first and second stage?

SpaceX will be doing a Pad Abort test at LC-40 in Florida for the Dragon V2 vehicle to close out the CCiCAP criteria. They will not be using a real first or second stage, instead building some kind ...
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2k views

What is simulated payload and why are they used?

I read that Angara 5 will carry a "payload simulator" on its first test flight tomorrow Dec. 23, 2014. But the Indian GSLV mk.III recently flew for the first time with a prototype of the ISRO crewed ...
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1answer
196 views

Orion Heat Shield

I've heard that a different design of heat shield will be in place for the future Orion missions. How is the heat shield going to be different, and will the (Planned) Dec 4th launch of Orion ...
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2answers
673 views

Through what mechanisms would SpaceX test and examine the returned CRS-5 first stage?

A significant minority of the users over at the /r/SpaceX Reddit community seem to be of the opinion that SpaceX will attempt to reuse the Falcon 9 CRS-5 first stage provided it lands on the downrange ...
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4answers
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Documentation and testing for a CubeSat launch?

If I had a CubeSat sitting on my desk ready to go today, what documentation and testing would I need to do before I could get it launched? Presumably the launch provider won’t just launch anything I ...
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1answer
492 views

Why is SpaceX testing Pad Abort at LC-40 (CCAFS) but Max-Q abort at Vandenberg?

Per SpaceNews article SpaceX has set November 2014 for a Pad Abort test from LC-40 in Florida, and January 2015 for a Max-Q abort test from Vandenberg Airforce Base in California. They have only done ...
6
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1answer
243 views

What boosters/launchers conduct hot fire tests before launch?

SpaceX has a practice of a hot fire test before the real launch. This gives them a chance to test any number of things, similar to launch, to identify possible issues. They test: Fueling Launch ...
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2answers
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Have SRBs or SSMEs ever launched without a space shuttle?

It seems to me that the April 12, 1981 launch of Columbia (STS-1) was the manned spaceflight with the most untested hardware of any manned space launch. Even the Vostok and Mercury launch systems had ...
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2answers
217 views

Curiosity's powered descent stage test

The landing procedure of Curiosity on Mars has been described as a real challenge in part because of the powered descent stage and sky crane. Indeed the separation of Curiosity with the backshell + ...
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1answer
147 views

How well did the Orbital Sciences' Cygnus cargo craft perform?

Regardless of the GPS discrepancy, Cygnus completed its mission. How well did it do, and, does SpaceX now have a proper competitor?
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1answer
239 views

What is the purpose of the Dream Chaser carry test?

I was reading that recently the Dream Chaser completed a carry test. Seems like they hung it from a helicopter and flew around with it. What benefit would this have over a wind tunnel test?
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1answer
396 views

Primary payload influence on hitchhiking CubeSat integration and testing?

Integration is the process of assembling or otherwise combining the separate subsystems into your final overall system. Testing involves making sure your components, subsystems, and overall system ...

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