Problem 45 - A Complete Resource Book in Chemistry for JEE Main

Question

What type for propellant was used in SLV-3 (India)? (a) UDMH \(+\) liquid \(\mathrm{N}_{2} \mathrm{O}_{4}\) (b) \(\mathrm{MMH}+\) liquid \(\mathrm{N}_{2} \mathrm{O}_{4}\) (c) kerosene + liquid oxygen (d) composite solid propellent

Step-by-Step Solution

Answer

Composite solid propellant was used in SLV-3.

Step 1: Understand the Question

The question asks for the type of propellant used in the SLV-3 rocket developed by India. You are provided with four options to choose from.

Step 2: Eliminate Incorrect Options

Let's explore the options one by one. SLV-3 was an early Indian space launch vehicle that typically used solid propellants. So we can eliminate options (a), (b), and (c) as they mention liquid fuels or a liquid oxidizer, which do not match solid propellant characteristics.

Step 3: Identify the Correct Option

Considering the typical use of solid propellants in early Indian launch vehicles like SLV-3, option (d), "composite solid propellant," is the correct choice. SLV-3 used a combination of solid propellant stages for its operation.

Key Concepts

SLV-3 rocket

The SLV-3 (Satellite Launch Vehicle-3) is India's first experimental satellite launch vehicle that marked the country's entry into space exploration. Developed by the Indian Space Research Organisation (ISRO), this rocket had a significant impact as it was the stepping stone for future space endeavors in India.

Being a four-stage vehicle, the SLV-3 primarily used solid-propellant rockets for each stage. Its first successful launch in 1980 from the Sriharikota Range carried the Rohini RH-1 satellite into near-Earth orbit. This mission not only highlighted India's growing technological capabilities but also demonstrated the potential to achieve self-reliant access to space.

Understanding the SLV-3 is crucial as it laid the groundwork for India's future launch vehicles like the PSLV and GSLV. It displayed the country’s initial mastery of rocket science, which would later allow India to expand its reach in space with more complex missions.

composite solid propellant

Composite solid propellant is a significant component in the world of rocket science, being crucial for the propulsion of rockets like the SLV-3. These propellants form the heart of solid rocket motors and consist of a rubbery binder mixed with oxidizers and metallic fuel particles.

The main characteristics of composite solid propellants are:

• Simplicity: Unlike liquid propellants, solid propellants have fewer moving parts, making them less complicated and more reliable.
• Ready-to-use: They are stored in a ready-to-launch state, which makes them ideal for military or short-notice launches.
• High performance: Composite solid propellants provide high thrust efficiently because the mixture is optimally balanced between fuel and oxidizer.

The SLV-3’s reliance on composite solid propellants allowed ISRO to create a practical and efficient launch vehicle with stable performance through the ignition.

rocket propulsion systems

Rocket propulsion systems can be broadly classified into solid, liquid, and hybrid systems. Each has unique features, advantages, and challenges in their operation.

For the SLV-3, the choice of a solid propulsion system was driven by its:

• Dependability: Solid rocket motors are known for their reliability, as they have fewer mechanical systems that could fail.
• Cost-effectiveness: Solid propellants are typically cheaper to produce compared to liquid propulsion systems.
• Ease of operation: With solid propulsion, rockets can be transported and stored in a launch-ready state, simplifying processes and reducing the chance of launch delays.

Despite these advantages, solid propulsion systems have their limitations, such as less control over thrust compared to liquid systems. Understanding these nuances helps in appreciating why the SLV-3 successfully utilized solid propulsion to achieve India's initial space ambitions.

solid propellant stages

A solid propellant stage refers to a section of a rocket that houses and burns solid propellant to generate thrust. In the case of the SLV-3, each stage worked in succession to reach the necessary speed and altitude.

Key features of solid propellant stages include:

• Layered design: Each stage is arranged one after another, igniting in sequence to propel the rocket further into space.
• Simplicity: Due to the all-in-one nature of the solid propellant, the stages have a simpler architecture.
• Rapid burn: Solid propellant stages burn quickly and produce a high-thrust launch, crucial for getting payloads quickly into orbit.

By utilizing multiple solid propellant stages in SLV-3, ISRO could manage the complexities of multi-stage rocketry. Each stage contributed to overcoming different phases of the launch, from initial lift-off to final orbital insertion.