To add how people starts posting... The Indians have a BVR with a smokeless engine. We all know the Astra is being tested on MKI right now. So as an engineer I do follow these developments. But if one starts to think that this smokeless engine is better then Y... Look, JF17 has MAWS. It works independent and fast and is networking with other systems inside the aircraft. Now this missile would be difficult to see cause there is no smoke... But MAWS works with non visible spectrum (and certainly that of the hot gasses!). So would Astra a lot more threatening for JF17? The Indians would think it is super duper. I think there is a lot of room for discussion Even if the engine is no longer burning there is still other spectrum to track it.