Questions tagged [testing]

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

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83 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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428 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. ...
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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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316 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 ...
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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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1answer
138 views

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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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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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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561 views

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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273 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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95 views

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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312 views

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 video projection screen is used in test 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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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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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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175 views

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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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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483 views

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 ...
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Testing a parachute for a Mars landing using a wind tunnel at hypersonic speed and Martian pressure?

The parachute for the Mars Science Laboratory (with the Curiosity rover) was tested in the NASA Ames Research Center 80 by 120 Foot Wind Tunnel. The wind tunnel is currently capable of air speeds up ...
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Why is a purging process necessary for static firing test of liquid rocket engines?

In Chapter 7 of Modern Engineering for Design of Liquid propellant Rocket Engines by Huzel and Huang, mentions the following engine cut off procedure. The cutoff sequence usually consists of ...
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543 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, MASA ...
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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, ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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Progress of the raptor engine

I have seen that SpaceX 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 ...
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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?
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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 ...
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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'...
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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 ...
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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 ...
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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 ...