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In the context of the launch of satellites, consider the following statements about Air Breathing Propulsion System:
1. It utilizes the atmospheric oxygen during the launch vehicle's flight through the atmosphere.
2. It was used in GSLV MK-III which was used to launch Chandrayaan-II.
Which of the statements given above is/are correct?
  • a)
    1 only
  • b)
    2 only
  • c)
    Both 1 and 2
  • d)
    Neither 1 nor 2
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
In the context of the launch of satellites, consider the following sta...
  • Launch vehicles use the combustion of propellants consisting of oxidizer and fuel for deriving the energy. Air-breathing propulsion systems (ABPS) use atmospheric oxygen, which is available up to about 50 km of earth’s surface to burn the fuel stored on-board thereby making the system much lighter, more efficient, and cost-effective. Air-breathing propulsion is a solution for a powered long return cruise flight necessary for reusable launch vehicles. Hence statement 1 is correct.
  • Considering the strategic nature of air-breathing technology which has the potential to bring a significant shift in the launch vehicle design, worldwide efforts are on to develop the technology for airbreathing engines.
  • A ramjet is a form of air-breathing jet engine that uses the vehicle’s forward motion to compress incoming air for combustion without a rotating compressor. Ramjets efficiency decreases when the vehicle reaches hypersonic speeds. A Supersonic Combustion Ramjet or Scramjet is an improvement over the ramjet engine as it efficiently operates at hypersonic speeds and allows supersonic combustion. A dual-mode ramjet (DMRJ) is a type of jet engine where a ramjet transforms into a scramjet over Mach 4-8 range, which means it can efficiently operate both in subsonic and supersonic combustor modes.
  • The development of ABPS is still in the experimental stage. In 2016, success flight testing of Scramjet was conducted. GSLV MkIII, chosen to launch Chandrayaan-2 spacecraft, is a three-stage heavy-lift launch vehicle developed by ISRO. ABPS was not used in the GSLV MkIII launch vehicle. Hence statement 2 is not correct.
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In the context of the launch of satellites, consider the following statements about Air Breathing Propulsion System:1. It utilizes the atmospheric oxygen during the launch vehicles flight through the atmosphere.2. It was used in GSLV MK-III which was used to launch Chandrayaan-II.Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'A'. Can you explain this answer?
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