Meet Pushpak, India’s Space Shuttle
At the heart of this ambition is the Reusable Launch Vehicle-Technology Demonstrator (RLV-TD), nicknamed 'Pushpak'. Unlike traditional rockets that are discarded after a single use, Pushpak is designed like a spaceplane. It features a fuselage, a nose
cap, double delta wings, and twin vertical tails, combining the complexities of both a launch vehicle and an aircraft. The ultimate vision is a two-stage-to-orbit (TSTO) system where the first stage flies back to Earth after launch, and the second, an orbital vehicle, deploys a satellite and then glides back to land on a runway, ready to be refurbished for another mission.
A Hat-Trick of Landing Success
ISRO recently concluded a series of critical Landing Experiments (LEX) at the Aeronautical Test Range in Chitradurga, Karnataka. The final test in June 2024 saw Pushpak successfully perform a precise, autonomous landing under challenging conditions. The winged vehicle was lifted by an Indian Air Force Chinook helicopter to an altitude of 4.5 km and released. From there, it navigated on its own, corrected its course, and landed perfectly on the runway centerline at speeds exceeding 320 kmph, much faster than a commercial airplane. This success followed two previous landing tests, with ISRO demonstrating the robustness of its design by reusing the same winged body and flight systems in the later experiments.
The Billion-Dollar Question: How Does It Cut Costs?
The single biggest driver behind reusable technology is economics. Traditional rockets are incredibly expensive because the entire vehicle is lost after one launch. Reusability changes the game entirely. By recovering and reusing the most expensive components, like the main engines and avionics, ISRO aims to dramatically slash the cost of putting a payload into orbit. The stated goal is to reduce the launch cost from the current average of around $20,000 per kilogram to about $4,000 per kilogram—a potential cost reduction of 80%. This would make space access more affordable for a wide range of customers, from telecommunication companies to scientific institutions and startups.
The Global Race for Reusability
ISRO is not alone in this pursuit. The global space economy, valued at over $600 billion in 2025, is increasingly being shaped by reusable technology. Companies like SpaceX in the United States have already proven the commercial viability of recovering and reusing rocket boosters, fundamentally altering the launch market. China has also recently made significant strides, successfully recovering its own orbital-class boosters. While ISRO's approach with a winged spaceplane differs from SpaceX's vertical-landing boosters, the strategic goal is the same: to secure a competitive position in the trillion-dollar global space market of the future.
What’s Next for Pushpak?
The successful completion of the landing experiments is a crucial milestone, but it's just one piece of the puzzle. ISRO has validated the autonomous landing technology needed for a vehicle returning from space. The next major step is the Orbital Re-entry Experiment (OREX). This will involve launching a scaled-up version of Pushpak into orbit on a rocket, letting it spend time in space, and then having it de-orbit and land on a runway autonomously. Alongside this, ISRO is also developing other key technologies, including air-breathing scramjet engines (SPEX), which could feature in future, more advanced versions of the vehicle. While the Gaganyaan human spaceflight program remains a top priority, the steady progress of the RLV program is paving the way for India's next generation of launch vehicles.
