Questions tagged [testing]

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

Filter by
Sorted by
Tagged with
4 votes
0 answers
120 views

Atomic oxygen and UV Radiation qualification tests for a cubesat

I'm the Assembly, Integration and Verification Engineer of a cubesat project developed by students. Currently I'm trying to create the specifications for our payloads upcoming (mon)atomic oxygen (ATOX)...
SmallSatEnthusiast1005's user avatar
3 votes
1 answer
81 views

CubeSat dispensers: amplify or dampen vibration loads on spacecraft?

CubeSat world: has anybody run a vibration test where you put accelerometers both on the dispenser (or shaker plate) and your spacecraft inside the dispenser? For the SunCET CubeSat, we're trying to ...
James Paul Mason's user avatar
4 votes
0 answers
125 views

Anti-Geyser Test Full Scale

I am working on the thesis about Geysering and Recirculation in Launch Vehicles. And I am having some diffucilties to understand that "do we need to use full-scale model to test geysering?". ...
srule's user avatar
  • 49
0 votes
1 answer
132 views

Why does SpaceX's integrated booster test not attempt to relight the second stage engines

Starting an engine in a vacuum under microgravity conditions is really difficult to test on Earth. Why isn't the first stage test being used to gather data for this?
JCRM's user avatar
  • 693
1 vote
1 answer
128 views

Need advice to set up reaction wheel cluster in lab

I am thinking of having a reaction wheel cluster set up in a physics lab for educational purposes. I would like to find out what the available options to me are. Here are some more specifics: I see ...
Jan Lynn's user avatar
  • 169
13 votes
1 answer
4k views

How does NASA have permission to test a nuclear engine?

In this article on nasa.gov (https://www.nasa.gov/press-release/nasa-darpa-will-test-nuclear-engine-for-future-mars-missions) it mentions that NASA will test a nuclear rocket engine for future crewed ...
The Rocket fan's user avatar
24 votes
4 answers
8k views

What is SpaceX doing differently with Starship to avoid it exploding like the N1?

Both Starship and the N1 have more than 30 rocket engines. The N1 exploded after having a chain reaction from a failed engine. N1 rocket engines: Starship’s rocket engines: Unlike the N1, SpaceX has ...
The Rocket fan's user avatar
2 votes
0 answers
800 views

What is the difference between a spin up test and a spin prime test?

What is the difference between a spin up test and a spin prime test? And if there is no difference, why not just use the first of those two terms, it being more descriptive?
tedtoal's user avatar
  • 121
0 votes
0 answers
49 views

How to test vaccum engines at sea level? [duplicate]

SpaceX is testing its Raptor vacuum engine (RVAC) at sea level (without any facility that can simulate near vacuum conditions). How can they do this without flow separation happening?
ikerdc's user avatar
  • 93
11 votes
1 answer
4k views

What is a rocket engine spin up test?

Recently I came across internet about SpaceX's Booster 7 explosion in a ball of fire during an engine spin up test. I searched Google about rocket engine spin up test but I got no hit. What is a ...
seccpur's user avatar
  • 1,175
1 vote
0 answers
84 views

NASA GMAT Hardware in the Loop testing

We are currently evaluating various Mission Analysis & Simulation tools, one of which is NASA's GMAT (2020). One of our requirements is for the tool to support HITL testing. However, i am unable ...
ITried's user avatar
  • 111
47 votes
1 answer
5k views

What safety protocols did this Pythom Space rocket crew ignore?

The video below of Pythom Space's first rocket test has raised a few eyebrows The video prompted hundreds of replies on Twitter, including some from rather horrified rocket scientists. "We knew ...
Machavity's user avatar
  • 7,780
3 votes
1 answer
395 views

Why was SERT-1 put in a suborbital trajectory (4000 km apogee) while SERT-2 (1970-009A) was put in a 1000 km circular polar orbit?

Wikipedia's SERT-1 says SERT-1 (Space Electric Rocket Test) was a NASA probe used to test electrostatic ion thruster design and was built by NASA's Lewis Research Center (now NASA Glenn). SERT-1 was ...
uhoh's user avatar
  • 148k
18 votes
1 answer
2k views

What does the ATOLL programming language look like?

During the Apollo program, checkout tests of launch vehicle and spacecraft systems were gradually being automated, moving away from the manual processes during the early years of the space program to (...
Ludo's user avatar
  • 14.1k
10 votes
1 answer
1k views

How do you test-fire vacuum engines in a vacuum chamber? Why doesn't it fill up almost instantly from the exhaust and spray (deluge) water?

How are vacuum optimized engines tested without disintegrating them? is an excellent question as it's attracted quite a number of informative and diverse answers. @Uwe's answer informs us that there ...
uhoh's user avatar
  • 148k
2 votes
0 answers
119 views

How unusual is it to test vacuum engines at sea level?

How are vacuum optimized engines tested without disintegrating them? is an excellent question as it's attracted quite a number of informative and diverse answers. @Uwe's answer informs us that there ...
uhoh's user avatar
  • 148k
2 votes
1 answer
74 views

Resources where one can find RD-171MV engine technical specifications? (e.g.TWR, Expansion Ratio, Isp, Thrust, Chamber pressure, O:F ratio)

I'm trying to get a hold of various technical specifications for the RD-171MV engine A modification of RD-171M being developed for the Irtysh rocket. Unlike RD-171M it's completely made from Russian ...
TheNerdium's user avatar
6 votes
2 answers
271 views

Why wasn't the high-speed rotation regime for Ingenuity tested on Earth?

On the NASA website, it says that the propeller on Ingenuity will need to spin faster than what has been done before during all of the previous tests to accommodate for the rarefied atmosphere during ...
usernumber's user avatar
  • 5,038
4 votes
5 answers
512 views

Post-flight analysis of SpaceX Starship 20 heat shield tiles

If Starship 20 will not be recovered, how will SpaceX evaluate the performance of the heat tiles? If a couple of heat tiles fall off and the Starship bursts into flames, how can SpaceX figure out ...
Florian F's user avatar
  • 327
2 votes
1 answer
224 views

Was the Isp = 11,000 seconds Neumann Drive tested on the ISS? Did it work? How well did it perform?

In 2018 answers were posted to What is Australia's Bartolomeo platform? When does it arrive at the ISS; when and where will it be attached? Will the Neumann drive start testing aboard the ISS ...
uhoh's user avatar
  • 148k
3 votes
0 answers
70 views

What is actually happening in this full mission rehearsal of CAPSTONE's propulsion hardware?

NASA Ames's feature CAPSTONE’s CubeSat Prepares for Lunar Flight says CAPSTONE will use a hydrazine-fueled propulsion system during most of its three- to four- month journey to the Moon. This line of ...
uhoh's user avatar
  • 148k
3 votes
0 answers
104 views

Why did tests in space of refrigerators of the type we use at home fail? How many were tried?

Phys.org's To give astronauts better food, engineers test a fridge prototype in microgravity says: Astronauts have been going to space since 1961, but they still don't have a refrigerator to use for ...
uhoh's user avatar
  • 148k
11 votes
2 answers
416 views

How many of these six military "orbital threat" techniques have been demonstrated in a (more or less) publicly recognized way?

If you are having a good day then under no circumstances should you read the US Defense Intelligence Agency's Challenges to Security in Space1 (Information cutoff date, January 2019) linked in Axios' ...
uhoh's user avatar
  • 148k
7 votes
0 answers
201 views

How is the Max-Q of a spacecraft determined?

Maximum aerodynamic pressure of a spacecraft is the maximum force it's hull can withstand during flight. How is the Max-Q of a spacecraft determined? Other related ( optional) queries are: If Max-Q ...
seccpur's user avatar
  • 1,175
5 votes
2 answers
324 views

Was this the only time that helium balloon was used to support deployed spacecraft appendages during testing on the ground in Earth gravity?

What is this balloon for in this clean room and what is the proper name for the "stand" that is holding the satellite? shows the image below, and a comment below @OrganicMarble's answer ...
uhoh's user avatar
  • 148k
12 votes
1 answer
1k views

Was the SK-1 spacesuit tested in flight prior to Gagarin's historic mission?

April 12 is the 60th anniversary of the first human spaceflight, Vostok 1. As no human had previously been to space, it was also a test of the SK-1 spacesuit that cosmonaut Yuri Gagarin wore. This ...
DrSheldon's user avatar
  • 47.8k
5 votes
1 answer
941 views

Static Fire Tests: How is the rocket prevented from flying?

In rockets like Starship, if 35 Raptors are firing at same time, then in a full-duration static fire test there would be enormous loads being exerted from 35 raptors, on the clamps holding the rocket. ...
Raj Arjit's user avatar
  • 373
4 votes
0 answers
74 views

Resources/guidelines on space electronics compliance?

Space hardware suffers from various effects such as radiation, heating, vibration, off-gassing, material degradation and so on. While these effects are mentioned in most space engineering books, I am ...
Spiros Makris's user avatar
5 votes
2 answers
327 views

Ingenuity Test Stand and Stroboscopic lightning

The paper on Ingenuity talks about the test setup of ingenuity Associated metrology in the form of a force/torque sensor, a Vicon motion tracking system, stroboscopic lighting, a thermal camera, and ...
zephyr0110's user avatar
  • 2,921
0 votes
1 answer
112 views

What "advanced computer capable of faster processing and data compression" is the S. S. Katherine Johnson carrying? (Cygnus NG-15)

CBS News; says: The primary goal of the Cygnus mission is to deliver science equipment and supplies for on-going research utilizing the microgravity environment aboard the space station. One ...
uhoh's user avatar
  • 148k
3 votes
0 answers
95 views

Was Dart antenna tested using a DSN antenna located in Australia?

So recently a tweet by a bot which tracks communications by the Deep Space Network stated that: DSS 43 receiving data from Double Asteroid Redirection Test at 312.5kb/s. IN LOCK IN LOCK 1 TURBO 11:11 ...
Barry Jenakuns's user avatar
2 votes
1 answer
120 views

Why wasn't there a 2nd attempt for the Viking-DS (VDS) test payload before the real Viking 1 and 2 were launched?

Per Gunter's Space Page for Viking-DS (VDS): Viking-DS or VDS (Viking Dynamic Simulator) was a vehicle evaluation payload, which was to represent the dynamic properties of the Viking spacecraft. It ...
uhoh's user avatar
  • 148k
4 votes
1 answer
145 views

What specific device failed, causing engine #4 in the Core Stage Green Run to report a Failure Identification?

(See this Q&A for context if needed: What is a "Major Component Failure" referred to in news reports about the unsuccessful Space Launch System core stage test firing?) In the post-test ...
Organic Marble's user avatar
1 vote
0 answers
63 views

Any large scale rocket static fires, like SpaceX's 3 in one day?

SpaceX on Jan 13, 2021 did three static fires in one day. Elon Musk tweeted: All three static fires completed & no RUDs! And that was in response to this tweet of his own: Today at SpaceX is ...
geoffc's user avatar
  • 79.4k
5 votes
2 answers
498 views

Longest static fire?

What is the longest duration for a static fire of a complete rocket stage? Initially I wanted to ask this for Falcon 9 and Falcon Heavy I found a 10 second static fire for Falcon Heavy - https://...
Joe Jobs's user avatar
  • 2,590
6 votes
2 answers
412 views

Is the acoustic horn at Stennis Space Center still there? Is it used?

Stennis Space Center had a giant horn installed in the times when they were testing the Saturn program engines. The purpose was to see what the acoustic conditions were like before testing and thus ...
Ludo's user avatar
  • 14.1k
4 votes
1 answer
141 views

How to experimentally determine the degree of atomization of the propellants mixing in a fuel injector?

When validating a fuel injector design on a test stand using liquid water to simulate a liquid-liquid fuel injector(the one i'm working with currently is a pintle design but I suppose one could ...
Jorge Mercado's user avatar
4 votes
0 answers
82 views

How much does annual maintenance of a vibration table cost?

The company I work for produces hardware for spacecraft and we routinely have to test that hardware to ensure it meets the stringent requirements for random vibration environments on the missions they ...
Terrance Yee's user avatar
  • 2,264
4 votes
0 answers
170 views

Could the Space Shuttles other than Enterprise easily do drop tests from the Shuttle Carrier Aircraft?

This question was inspired by comments on this answer. The Space Shuttle prototype Enterprise was only used for approach and landing tests, for which it was flown on a carrier 747, until it was ...
Speedphoenix's user avatar
  • 5,324
3 votes
1 answer
226 views

Did Corporal or other rockets launched from White Sands land in Mexico? If so, how often?

At 10:39 in the video Explorer One is the following: Pickering had once half-joked that JPL could do anything, but building the corporal proved a humbling ...
uhoh's user avatar
  • 148k
23 votes
3 answers
4k views

Could Mars Rovers be lighter or faster if they didn't have to be tested on Earth?

Watching this video of Perserverance being tested on Earth, it occurred to me that requiring it to stand, drive, climb, etc. under 1g is, in some sense, overkill. Could this (or other) rovers be made ...
Steve Linton's user avatar
  • 19.4k
2 votes
1 answer
89 views

At what altitude(s) were the Viking BLDT rockets fired?

I'm trying to understand the details of the 1972 Viking BLDT test missions (in earth's atmosphere). I found this diagram in a book and the general description that the (four) BLDT (balloon drop) tests ...
Fizz's user avatar
  • 173
4 votes
2 answers
617 views

Why was ISRO's CARE reentry demonstration at 5300 m/s so slow?

This community wiki answer to What are some details of ISRO's Gaganyaan Mission currently says: Crew Module Atmospheric Re-entry Experiment (CARE) was launched on 18 December 2014 at 04:00 UTC. ...
uhoh's user avatar
  • 148k
4 votes
1 answer
151 views

Was LM1 of Apollo 5 equipped with additional sensors and telemetry for the umanned "fire in the hole" test?

The first unmanned test of the Lunar Module was done in mission Apollo 5 LM 1. The separation of the ascent stage from the descent stage was done during flight. Did they install additional sensors and ...
Uwe's user avatar
  • 48.8k
7 votes
1 answer
3k views

How do engineers know new engines will work nominally once they reach space?

Obviously you test fire a new engines as many times as you see fit on earth, but how do you know the effect the vacuum of space (or really the lack of gravity/air) will have on a new engine? Is it ...
Stickyz's user avatar
  • 346
10 votes
2 answers
284 views

What is it about parachutes that makes people always want to "re-invent the wheel"?

For technology that involves complex engineering issues, standardization and specialization is extremely helpful. If I want to design a complex ASIC IC I don't design it from scratch, I just drag-and-...
uhoh's user avatar
  • 148k
26 votes
4 answers
8k views

Why was the SpaceX abort test not initiated by real booster failure?

Today (2020-01-19) SpaceX had a successful flight abort test. As far as I can understand, at a specific altitude, Crew Dragon fired its engines and escaped from the rocket. This test looks like a ...
Jithin Jose's user avatar
2 votes
0 answers
43 views

How high will the Crew Dragon capsule get during the In-Flight Abort?

During the In-Flight Abort test (IFA), the Crew Dragon capsule will pull away from the Falcon 9 rocket when the rocket is undergoing maximum aerodynamic stress. At that time, it will still be going ...
PearsonArtPhoto's user avatar
  • 121k
11 votes
1 answer
731 views

Why did the SpaceX Starship MK1 prototype pop?

During a pressurization test on November 20th, 2019, SpaceX's Starship MK1 prototype "popped" at the SpaceX facility in Boca Chica TX. Do we know what caused this apparent failure? Some claim that ...
Dragongeek's user avatar
  • 18.1k
3 votes
0 answers
55 views

What's the most optimal method of motor attachment for Horizontal Static Fire Tests?

I'm a college student new to rocketry, and am working on the horizontal test structure for a static fire test of our motors. The max thrust for the booster motor is about 6000 pounds, and the ...
Jacob's user avatar
  • 31