India’s prototype X-37B, dubbed Pushpak, completes third successfully drop test runway landing

India’s space agency ISRO today successfully completed the third drop test from a helicopter to a runway landing of an X-37B engineering test vehicle, dubbed Pushpak.

The winged vehicle, named ‘Pushpak’, was released from an Indian Air Force Chinook Helicopter at an altitude of 4.5 km. Pushpak autonomously executed cross-range correction manoeuvres, approached the runway, and performed a precise horizontal landing at the runway centerline.

The vehicle also used the same body and flight systems from the previous flight without modifications. Though this is hardly a return from space, the landing profile attempted to duplicate much of that flight path, and thus demonstrated ISRO engineers are on the right track for creating a reusable mini-shuttle.

ISRO completes second drop test runway landing of its own mini-reusable shuttle

Pushpak about to land
Click for original image

India’s space agency ISRO yesterday successfully completed the second runway landing of its own mini-reusable shuttle, dubbed Pushpak, after the vehicle was dropped from a helicopter at an altitude of 2.8 miles.

This mission successfully simulated the approach and high-speed landing conditions of RLV returning from space. With this second mission, ISRO has re-validated the indigenously developed technologies in the areas of navigation, control systems, landing gear and deceleration systems essential for performing a high-speed autonomous landing of a space-returning vehicle. The winged body and all flight systems used in RLV-LEX-01 were reused in the RLV-LEX-02 mission after due certification/clearances. Hence reuse capability of flight hardware and flight systems is also demonstrated in this mission. Based on the observations from RLV-LEX-01, the airframe structure and landing gear were strengthened to tolerate higher landing loads. [emphasis mine]

The highlighted sentences I think are the most significant. ISRO is pushing hard for reusability.

The concept of this spacecraft is somewhat comparable to the X-37B, though all the engineering can be applied to larger shuttles that can carry cargo and humans in and out of orbit. At the moment however Pushpak is simply an engineering test prototype, not yet ready for orbital flights. For example, the landing gears are too large and cannot be retracted, something unacceptable for orbital flights.