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A pad abort test is a test of a launch escape system to determine how well the system could get the crew of a spacecraft to safety in an emergency on the launch pad.

Mercury pad abort test

Contents

Project MercuryEdit

Section sources.[1][2]

The Mercury program included several pad abort tests for the launch escape system with a boilerplate crew module.

  • 1959 July 22 – First successful pad abort flight test with a functional escape tower attached to a Mercury boilerplate
  • 1959 July 28 – A Mercury boilerplate with instruments to measure sound pressure levels and vibrations from the Little Joe test rocket and Grand Central abort rocket/escape tower

Project ApolloEdit

 
Apollo Pad Abort Test 2

The Apollo program included several pad abort tests for the launch escape system with a boilerplate crew module.

Both tests were conducted at the White Sands Missile Range.

OrionEdit

 
Artist's concept of an Orion pad abort test.

The Orion pad abort test was started with the construction of the first Orion boilerplate. It is a basic mockup prototype to test the assembling sequences and launch procedures at NASA's Langley Research Center. Lockheed Martin Corp. was awarded the contract to build Orion on Aug. 31, 2006. The first pad abort test trial of the escape tower system was successfully completed at New Mexico's White Sands Missile Range on May 6, 2010.[3][4]

Dragon V2Edit

SpaceX Dragon V2 Pad Abort Test-1 was conducted on May 6, 2015.

The pad abort test was conducted successfully on 6 May 2015 at approximately 0900 Eastern Daylight Time (EDT). The vehicle splashed down safely in the ocean to the east of the launchpad 99 seconds later.[5] A fuel mixture ratio issue was detected after the flight in one of the eight SuperDraco engines, but did not materially affect the flight.[6] More detailed test results were to be subsequently analyzed by both SpaceX and NASA engineers.[7]

ISRO pad abort testEdit

 
ISRO pad abort test of its crew module as part of Indian human spaceflight programme

On 5 July 2018, Indian Space Research Organisation successfully conducted a pad abort test at Satish Dhawan Space Centre, Sriharikota. A first in a series of tests to qualify a crew escape system.[8]

After a smooth countdown of 5 hours, the crew escape system, along with the simulated crew module with a mass of 12.6 tonnes, lifted off at 07.00 AM (IST) at the opening of the launch window from its pad at Satish Dhawan Space Centre, Sriharikota. The test was over in 259 seconds, during which the crew escape system along with crew module soared skyward, then arced out over the Bay of Bengal and floated back to Earth under its parachutes about 2.9 km from Sriharikota.

See alsoEdit

  • Soyuz T-10-1, a Soyuz mission which ended with the use of the launch escape system

ReferencesEdit

  1. ^ Mercury Pad Abort Tests
  2. ^ NASA History Archives
  3. ^ http://vimeo.com/11631855
  4. ^ NASA's Project Constellation Official Site
  5. ^ Clark, Stephen (6 May 2015). "SpaceX crew capsule completes dramatic abort test". Spaceflight Now. Retrieved 14 May 2015.
  6. ^ "SpaceX Crew Dragon pad abort: Test flight demos launch escape system". CollectSpace. 6 May 2015. Retrieved 14 May 2015.
  7. ^ Bergin, Chris (6 May 2015). "Dragon 2 conducts Pad Abort leap in key SpaceX test". NASASpaceFlight.com. Retrieved 6 May 2015.
  8. ^ "Suiccessful Flight Testing of Crew Escape System – Technology Demonstrator –  ISRO". www.isro.gov.in. Retrieved 2018-07-05.