A key challenge in the AMCA programme is to develop a new engine, powerful enough to permit super-cruising. For now, AMCA designers are working with twin General Electric (GE) F-414 engines – which is also being used, in a single- engine configuration, to power the Tejas Mark 2.
However, this engine is not powerful enough for super-cruising in all configurations. “Each F-414 engine generates a maximum thrust of 98 KiloNewtons (KN), and in Indian climatic conditions that effectively reduces to 90 KN. We have calculated that an AMCA, with the configuration the IAF has specified, requires a thrust of about 220 KN (in Indian conditions) for super-cruising. That means we need twin engines, each generating 110 KN thrust in Indian conditions,” says Deodhare.
A clutch of DRDO laboratories, led by the Gas Turbine Research Establishment (GTRE), Bengaluru, is working to develop the AMCA engine. With the Kaveri engine, GTRE had managed to generate a maximum thrust of 83 KN. Now the target is 50 per cent higher.
Former Defence Minister Manohar Parrikar had estimated the AMCA’s development cost at about $4 billion – a major share of which would go into the engine. In 2015, India harnessed American expertise by setting up a “joint working group” (JWG) to co-develop jet engine technology. But on October 24, US Under Secretary of Defence Ellen Lord revealed the JWG had been scrapped since US export control laws safeguarded the technology that the DRDO wanted.
There is also an expectation, so far unrealised, that French engine maker, Safran, could assist with developing a suitable jet engine, as a part of its offset obligations relating to the purchase of 36 Rafale fighters.
( if we go by this report that means government is willing to spend 1-2 billion $ more on kaveri engine. Kaveri project is not dead BY ANY MEANS)