Questions tagged [testing]

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

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3
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0answers
95 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 ...
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1answer
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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' ...
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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 ...
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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 ...
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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 ...
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1answer
178 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. ...
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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 ...
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2answers
281 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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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://...
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1answer
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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 ...
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1answer
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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 ...
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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 ...
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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 ...
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1answer
178 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 ...
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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 ...
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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 ...
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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. ...
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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 ...
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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 ...
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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-...
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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 ...
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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 ...
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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 ...
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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 ...
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Were the landing gear doors closed during the Approach and Landing Tests?

This photo from an answer on the Shuttle Approach and Landing Tests shows the front attachment between the Enterprise orbiter and the Shuttle Carrier Aircraft. The support strut reaches the ...
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Have nuclear explosions in space produced any debris that was subsequently tracked, or did all of them completely self-vaporize?

This answer to Where in the solar system could a nuke be tested without anybody noticing? has got me wondering if nuclear explosions (nuclear tests) in space above Earth ever produced any chunks of ...
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How does the Saturn V Dynamic Test Stand work?

This photo instantly provokes a ton of questions in me: It shows the Dynamic Test Stand at Marshall SFC with the Enterprise, which was a Space Shuttle test vehicle, suspended for vibration testing. ...
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1answer
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How was sky crane (used on Mars Science Laboratory's Curiosity) tested?

This is sky crane: Mars has 1/3 of Earth's gravity, so how was sky crane tested on Earth? Did they even test it at all? Did they repeatedly do the math, and make sure everything works so that they ...
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1answer
133 views

Could Spacex build a starhopper (starship prototype) at Vandenburg, CA launch site?

I know Spacex is building a starhopper (starship prototype) in Texas and Florida. Could they also build a starhopper prototype at the Vandenburg, CA launch complex? I know Vandenburg is better for ...
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Does static fire reduce reliability?

I do understand that static fire helps discovering malfunctions, as explained in this answer. A launch exerts an important stress on rockets' engines (high temperature and pressure, vibrations,...) ...
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285 views

Why jettison the data recorders in the Orion AA2 abort test?

This answer states parameters were transmitted in real time. Thus, why was it needed to record them onboard into (perhaps complex) data recorder that are then jettisoned (with a probability of ...
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Why no parachutes in the Orion AA2 abort test?

On July 2, 2019, the Ascent Abort 2 test of the Orion spacecraft was performed, with the Orion command module ascending on a solid rocket booster, then firing its launch escape system to safely ...
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1answer
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Testing of a first stage using dummy upper stages?

The first stage of the Saturn I was tested three times using dummy upper stages filled with ballast water, see Project Highwater and this question. The first two flight tests of the Saturn V (SA-501 ...
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1answer
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What is the Process for Re-certifying Flight Hardware?

I was reading about how we reused the water tanks because they were still within their certified life-time and had two questions: When would a certification become VOID? I'd assume if the water ...
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Does anyone have pictures of the “lunodrom” that Russia constructed to test the first rover?

Was reading another question involving the Lunokhod missions and then I stumbled across this wikipedia page which stated: In mid-1968, at the facility KIP-10 or NIP-10 (КИП-10 or НИП-10)[3] in the ...
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What exactly is a “Green Run test” for SLS that NASA is considering skipping?

The Ars Technica article Rocket Report: A new Delta 2, Blue Origin inks with NASA, a fiery Falcon Heavy says: Boeing seeks to ship SLS core stage by the end of 2019. With a renewed emphasis from the ...
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How is this video projection screen is used in tests of Europa Clipper's high gain antenna?

Phys.org's Europa Clipper high-gain antenna undergoes testing says: The full-scale prototype antenna, which at 10 feet (3 meters) tall is the same height as a standard basketball hoop, is in the ...
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3answers
103 views

Alternative tests for A-SAT missiles

Keeping the strategic consequences of blowing up an actual satellite as technology demonstration aside, I want to assess it from a purely scientific/technological standpoint. To demonstrate the ...
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1answer
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For the Starhopper testing, how will SpaceX hold down the vehicle?

SpaceX is testing the Raptor engine on the Starhopper they built in Boca Chica. For static fires of a Falcon 9/Heavy they use the pad itself, the holddowns to the pad, to keep it from taking off. ...
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2answers
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Why would an 8-minute burn result in a 6-month delay?

The Ars Technica article Vice President may tell NASA to accelerate lunar landings ends with: And on Thursday, NASASpaceFlight.com reported that the agency is considering skipping a critical test ...
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How is sunlight simulated in spacecraft testing, given its brightness?

How could a light source like the sun be approximated on Earth for testing, given how much brighter it is in space than anything else?
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How are fixed exposure cameras calibrated on earth for space lighting?

How are cameras that have a fixed exposure/gain calibrated/tested on earth for space lighting? I'll further explain with a hypothetical example of what I mean: ISRO launches a Mars-bound planetary ...
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1answer
642 views

What is “light bar testing”?

A photo of the Parker Solar Probe was captioned as follows: In the Astrotech processing facility in Titusville, Florida, near NASA's Kennedy Space Center, on Tuesday, June 5, 2018, technicians and ...
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What was NASA's Tire Assault Vehicle?

Why did NASA build a vehicle specifically designed to attack aircraft tires?
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What psychiatric and psychological tests do people need to pass to become astronauts?

I am writing a short film about an astronaut during re-entry to earth. Part of the conflict I wrote is that the astronaut could not pass the mental tests required. Could anyone tell me any tests ...