@Deino, @
UKBengali, @
52051
Engineering, a new engine and new plane, to be compatible, with an old engine, seems backward to me. Even that's possible. I wouldn't go through that kind of trouble and complicate my life.
I would just make, a quick prototype, with the new engine core, by "adapting" proven existing technology. This way I would have time,
to test the design, of the new engine core, thoroughly, while I wait for the actual new engine to be ready, for flight testing. This way, I could have the best of both world.
This way,
1.) will reduce risk by using as much existing technology as possible in initial flight testings.
2.) will, actually test the new engine core, to flush out the potential problems, as early as possible, so the engineers have time to solve them.
3.) will give the engineers, additional time to finish, the complete design of the new engine, and have more time to do ground testings, before it is put on the new plane, for flight testing.
4.) This is by far, the best and safest way, to keep the testing and development schedule. IMO.
Remember, the engineers and management and test pilots, wants to play it safe too, they don't want their new planes crashed, regularly, but they have a very tight schedule to keep too, otherwise, they lose their jobs.
The idea that J-20, is still using an old engine, after 6 years of testing (and the new engine, never made it, to flight testing on J-20, yet), while going to LRIP, seems crazily stupid to me.
But that's just me.
By insisting J-20 was flying with (and still is flying with) WS-10 or AL-31FN, you guys, seems proving my suspicion, that some people, don't care (or don't understand) about the fact ,that
total engine thrust, must be greater than
plane's flying weight, for it to fly in a
sustained vertical climb.
And if Afterburner was not used, in the
sustained vertical climb, it's Dry Thrust, must be greater than, it's flying weight.
I guess not everyone took a basic Physics course in his life, or remember what he has learned in that class.
If it were not for, the sustained vertical climb demonstration, back in November 1, 2016, I wouldn't have a firm opinion, that J-20 is already using WS-15, perhaps, as early as the first day of the testing, in 2011.
This is a sticking/stinking point, isn't it?
Anyone, who is ignoring, this amazing demonstration, is putting his head, in the sand, like an ostrich.
I see PDF has the polling facility, we usually apply it at sports forums.
