J-20 5th Gen Fighter Thread VIII
- Thread starter Blitzo
- Start date
the first is already mass produced, possible retrofitted onto flankers later? The latter was abandoned because 1.ws10 was already performing so well that the project lost its necessity and 2. too low bypass ratio was discovered to be detrimental to range
2x180kn is too much for fighter in this class; j-20 is big, but not that big.
Not that you should really use max throttle all the time mind you... Never heard of people complaining their plane has too much thrust.
It's barely enough for a thrust to weight of 1 with maximum payload, its not as if it will fly its wings off.
No one does, but it leads to a highly inefficient design in multiple ways, both for aircraft and the engine.
It isn't a world record book jet, after all. 2x18t is good for something 32-36t combat, 45-50 MTOW. That's a lot of jet.
F-135 has higher T/W than F-119 because it has higher bypass ratio e.g. bigger fan. It isn't more advanced than F-119. If you compare their TW without afterburner, F-119 is still better. To make a point, LEAP-1 engine for airliners has higher TW ratio than F-135 without afterburner because of its huge fan. The point is TW alone isn't a measurement of advanced engine.
Core is the same. It’s using better materials but the engine cycle wasn’t innovated on.