Why doesn't India have a reusable launch vehicle yet?

One capability separates the world's cheapest launch provider from everyone else: recovering a rocket that has already flown to orbit and flying it again. As of now, only the United States has done it. No Indian launch vehicle has ever flown to orbit and then been recovered and reflown. ISRO's operational fleet — PSLV, GSLV and LVM3 — is fully expendable.

Reusability is the main lever behind the collapse in launch costs led by SpaceX, whose Falcon 9 turned booster recovery into routine economics. The absence of an equivalent indigenous capability structurally caps how cheaply India can put payloads in orbit, and how competitively it can bid in the commercial launch market.

The difficulty is not one problem but several, each hard on its own. A stage that returns must fly a rocket engine that can throttle down deeply and restart reliably for a propulsive landing. It needs closed-loop guidance that can steer a falling body through the atmosphere and set it down without a human in the loop. It needs a thermal protection system that survives repeated hypersonic re-entry heating without a full teardown between flights. And it needs a refurbishment and reflight process fast and cheap enough to make reuse worth the mass penalty of carrying landing hardware to orbit and back. Only a handful of programmes on Earth have integrated all of this.

India has demonstrated pieces of it — separately, and convincingly. The RLV-TD HEX-01 experiment in May 2016 launched a winged vehicle on a solid booster, released it at altitude, and glided it back at hypersonic speed before it splashed into the Bay of Bengal. That validated the winged-body aerodynamics and the thermal protection under real re-entry heating. The follow-on landing programme uses a scaled winged vehicle named Pushpak, lifted by helicopter and released to fly an autonomous runway landing. LEX-01 flew at the Aeronautical Test Range in Chitradurga, Karnataka; LEX-02 in March 2024 and LEX-03 in June 2024 repeated the landing under progressively more demanding release and cross-range conditions, with the vehicle correcting its own trajectory and touching down on the runway centreline.

These are discrete flight-test milestones, not an integrated vehicle. ISRO (Vikram Sarabhai Space Centre) is in the testing stage: it has demonstrated hypersonic re-entry aerodynamics, reusable thermal protection and autonomous precision landing, but has not flown, recovered and reflown an orbital-class stage.

The gap persists because the capabilities beneath reusability are themselves still maturing. The deep-throttling liquid rocket engine needed for propulsive descent, the VTVL guidance software for hover and touchdown, and the semi-cryogenic engine planned for the next-generation vehicle are all classed as emerging rather than proven. The rapid refurbishment process and the framework to certify a previously flown stage as safe to fly again do not yet exist. Pushpak has shown India can glide a winged body home and land it; it has not shown India can bring a booster down under its own thrust and turn it around for another flight.

What it would take is convergence. The Union Cabinet has approved the Next Generation Launch Vehicle, designed for a payload class above LVM3 and intended to incorporate reusability-relevant technology. Turning today's separated demonstrations — the aerodynamics, the thermal skin, the autonomous landing — into a single stage that flies, returns, is refurbished and flies again requires maturing the throttleable engine, the descent-control surfaces, the reflight process and the certification framework in step.

The instruments elsewhere keep moving. SpaceX's Starship is being developed as a fully reusable two-stage system, catching its booster at the launch tower. Blue Origin's New Glenn reached orbit in January 2025, though its debut booster landing did not succeed. India is climbing the same mountain, one demonstrated step at a time.