Light, medium, heavy: Is Isro working on 3 reusable rocket designs at once?

Isro's recent announcements suggest it wants to secure a competitive advantage as quickly as possible in all segments of the launch services market: light, medium and heavy

The Indian Space Research Organisation (Isro) is working on at least three different designs of reusable launch vehicles at the same time.

Together with its endeavours to increase the number of objectives per mission and deploy purpose-built rockets, it seems like Isro wants to secure a competitive advantage as quickly as possible in all segments of the launch services market: light, medium and heavy.

Last week, Isro chairman K. Sivan told Times of India that they will be soon testing a prototype two-stage rocket in which both stages will be recoverable after launch. Sivan’s specifications suggest that this project is in addition