Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [testing]

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

4
votes
1answer
107 views

Which of the orientation is preferred for static fire testing of a liquid rocket engine - vertical or horizontal?

Liquid rocket engine's hot fire testings are performed both vertically and horizontally. Vertical orientation - Falcon heavy, Falcon 9, Rutherford engine, UCSD Engine test from 2014 , Merlin 1D, ...
3
votes
2answers
150 views

Why is ISRO Launch Escape System so SLOW?

I've just watched a video of the recent test and one thing I noticed is that comparing to other LES, like Mercury, Dragon, Soyuz, it looks really sluggy - like it has like 1.3-1.5 TWR. For pad abort, ...
3
votes
1answer
98 views

What is the surrogate liquid for LOx during the preliminary testing of injectors?

Before transitioning to the LOx tests during any new injector development, water is typically used for calculating flow rates, pressure loss, etc. But testing with water cannot qualify as a suitable ...
4
votes
2answers
175 views

Which ISRO satellite was built in 24 hours?

In the video New ISRO Chief Rocket Man Sivan K, A Farmer's Son, Takes On SpaceX after about 08:33 the interviewer asks ISRO's chairperson Kailasavadivoo Sivan about ...
6
votes
1answer
500 views

What is Australia's Bartolomeo platform? When does it arrive at the ISS; when and where will it be attached?

In this answer I first heard about Australia's upcoming Bartolomeo platform, which will be used for testing things such as the Neumann drive. Question: What is Australia's Bartolomeo platform? When ...
4
votes
1answer
247 views

Will the Neumann drive start testing aboard the ISS some time in 2018?

The 2016 Daily Mail article Radical ion rocket engine that could 'get to Mars and back on one tank of fuel' set to be tested on the ISS says: Neumann Drive achieves more than 11,000 seconds of ...
2
votes
1answer
66 views

Project Morpheus

This is the NASA tether test configuration of project Morpheus. The image has been taken from this paper. The test is basically to test the NGC and engine performance of the vehicle. Here we find a ...
10
votes
1answer
578 views

Testing flight characteristics before actual flight in model rockets?

I do a lot of scratch design/building of model rockets, but one of the things that I've struggled with is testing the models I come up with. Some of them are purely intended to be static display ...
6
votes
1answer
180 views

Disposal pool during RS-25 engine test?

Nasa recently did a test firing of an RS-25 rocket, and released a video of it. Here's a frame grab: Note that pool of water at the bottom right, with a pipe leading to it, and clouds of steam coming ...
5
votes
0answers
502 views

Progress of the raptor engine

I have seen that Space X has tested a scaled down version of the raptor, but that was about a year ago. Does anyone know the current progress? Do they have a full scale model? Have they hot fired a ...
34
votes
3answers
7k views

Why is there any launch window at all for the Falcon Heavy test flight?

Why is the window only ~3 hours long, why not 2? why not 5? why not "until it launches"? I'm guessing range safety, they could only get a TFR that long?
12
votes
3answers
3k views

Will the January 2018 government shutdown affect the Falcon Heavy launch?

The Falcon Heavy is currently undergoing testing at Kennedy Space Center's Pad 39A, which SpaceX is leasing from NASA. The hold-down test firing, according to the previously-linked article, may occur ...
7
votes
1answer
429 views

RS-25 Hot Fire Test

Yesterday, NASA Stennis successfully completed a hot fire test of Aerojet Rocketdyne RS-25 a.k.a SSME. It was noted in the webcast before the test started that they were testing the 'engine controller'...
5
votes
2answers
206 views

Does stress-testing a spacecraft affect its durability?

When a spacecraft is built and prepared for a future launch, its parts and the whole spacecraft usually goes through a lot of testing - for example, the James Webb telescope has already been through ...
7
votes
2answers
697 views

What will the Falcon Heavy maiden flight launch as its payload?

I know that Elon Musk has stated that SpaceX will try to launch the "silliest thing imaginable" on the maiden flight of the Falcon Heavy, but will it be a Dragon capsule on top or a special SpaceX ...
4
votes
2answers
329 views

What was the “sour milk smell” during the 1967 Apollo 1 testing?

In the first edition of Andrew Chaikin's 1994 book, "A Man on the Moon, there is a paragraph in chapter 1 which talks about troubles the Apollo 1 testing crew were going through. Chaikin states that ...
32
votes
3answers
4k views

Why is there a large wooden ball on Mariner 3's magnetometer?

Wood is good for certain niche space exploration applications, but the one below is not for spaceflight. According to the documentation for the archived photo: Several spacecraft were built for ...
6
votes
2answers
187 views

Why will GOES-R take a whole year for validation?

I've been reading a few things about NOAA's GOES-R satellite, and I noticed this on the GOES-R site: ...will be placed in the 89.5° checkout orbit where it will undergo an extended checkout and ...
4
votes
1answer
464 views

Have spaceships been tested to withstand bullets?

This answer on Worldbuilding (to "How to solve the old 'gun on a spaceship' problem?") posits that ISS can easily withstand a bullet fired from a handgun Our current micrometeorite shielding can ...
7
votes
1answer
147 views

How does Orion take its bath (Hydro Impact Basin)?

In 2011 the NASA Langley Research Center completed the Hydro Impact Basin for conducting drop tests of the Orion spacecraft. How much water is the basin filled with for these tests? Does the Orion ...
18
votes
1answer
1k views

Why is the F9-029 Amos 6 case more complex than the F9-020 CRS-7 explosion?

In the F9-029 Amos 6 mission failure at the launch pad, a "fast fire" happened near the 2nd stage of Falcon 9 FT. In F9-020 CRS-7 mission, an explosion happened in flight (again in the 2nd stage) a ...
0
votes
0answers
43 views

Why was the payload placed on the rocket for a test? [duplicate]

The payload for the Falcon 9, the Amos 6 satellite, was placed on top of the rocket during the static fire test. Why was this done?
3
votes
1answer
693 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 ...
37
votes
3answers
4k views

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? ...
27
votes
1answer
3k views

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 "...
6
votes
3answers
323 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 ...
4
votes
0answers
87 views

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 ...
18
votes
4answers
3k 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
votes
2answers
1k views

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 ...
0
votes
0answers
87 views

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
votes
2answers
301 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
votes
1answer
338 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 ...
6
votes
1answer
331 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 ...
11
votes
2answers
2k 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 ...
16
votes
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
votes
2answers
426 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 ...
8
votes
0answers
178 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, ...
13
votes
3answers
968 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
votes
1answer
159 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 ...
7
votes
1answer
452 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 ...
15
votes
2answers
763 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
votes
1answer
280 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 ...
20
votes
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
votes
1answer
642 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? ...
4
votes
2answers
772 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 ...
7
votes
1answer
190 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 ...
7
votes
1answer
895 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 ...
11
votes
2answers
1k 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 ...
3
votes
1answer
167 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 ...
10
votes
2answers
613 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 ...