What is the biggest challenge for ISRO?

zeebiz.com

Before understanding this, one has to understand about a rocket launch and reusable launch vehicle.
Most rockets use two-stage or three-stage. The rocket is launched in the first stage and then when the first stage runs out of fuel, the component separates from the rocket and then returns to Earth due to gravity. And the second stage starts as soon as the first stage is separated. Third after finishing second.

Components that break away from rockets are not used again. In this way, the next time when you have to launch, the rocket has to be completed again, which costs more money. The solution to this problem is the reusable launch vehicle.

When the first stage is completed in the reusable launch vehicle, some fuel is saved in that booster. And when it is separated from the rocket, this fuel is used for the landing of the component. Then when these components come back to Earth, they are used in the next launching.

SpaceX has created the Falcon 9 reusable launch vehicle. It is used in the next launch after landing its first stage. It costs $ 54 million to build the entire rocket and it costs $ 0.2 million for fuel. So if seen, the next launch will cost money only for the next stage of rocket and fuel which will be less than before.

Two of China's private rocket firms, Link Space and iSpace, are also developing similar launch systems. Link Space has also completed 3 tests of its system. It is expected that it will be fully developed in 3-4.

Once such systems are fully developed, the cost of satellite launching will be up to 4-5 times. And if many companies develop such a launch vehicle then it can be even cheaper.

 So what could be the problem for ISRO? ISRO is known for its affordable launching. ISRO launches satellites around the world at very cheap prices. But ISRO does not have a reusable launch vehicle and there is no hope for the next 7-8 years. Because no such project is being run by ISRO nor any Indian private company is working in this field.