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Oh give me a break. I'm not saying J-20 is definitely using Al-31FM2. I'm saying if J-20 can supercruise it's probably using Al-31FM2. If it can't supercruise then it isn't probably isn't using Al-31FM2. It's all of you who insist J-20 must be using WS-15 or a WS-10 variant and refuse to...

Come on you can do better than that. If you think J-20 can supercruise and isn't using Al-31FM2 or a similar Russian engine then show us some credible rumours or better yet some photos which demonstrate that WS-15 or WS-10IPE was ready years ago.

Al-31FM2 exists. The announcement in 2012 was when the engine was already in late stages of testing, for consideration of installation onto Sukhoi fighters. There are Russian language reports on this that can be found on a thread, by people who follow the Russian military as closely as we follow...

? I think you have no idea what I wrote. Outstanding supersonic maneuverability means the aircraft has outstanding maneuverability while at supersonic speed. Supersonic speed can be achieved via wet thrust or dry thrust; aka via supercruise or via afterburner. I'm saying if J-20 is able to...

I don't need to prove that J-20 is using Al-31FM2. I am saying that if J-20 is able to supercruise, then it is likely using an engine like Al-31FM2. If you believe J-20 is not using Al-31FM2, then the most likely conclusion is that J-20 simply is unable to supercruise, and that the pilot's...

Logically speaking, for us to believe J-20 is using WS-15 we must first have strong rumours that WS-15 has completed development and is ready for J-20. We do not have any strong rumours suggesting WS-15 has completed development. I want J-20 to use WS-15 as much as the next person, but I also...

Okay, so what do you think is more likely? A: the documentary's specific words in that scene were real and J-20 is using a new super WS-10 variant (like WS-10IPE, whose development progress we have not heard of for a while), for a few years, at least since prototype s/n 2011? B: the...

.... the problem is that the pilot only said "一进了超音速" which means "once entering supersonic speed". The pilot did not say "超音速巡航" which is supersonic cruise. In other words, there is no precondition for us to suspect that J-20 must be able to achieve the definition of supercruise being Mach...

Whoa, let's slow down here with the holier than thou. I've given you a much better argument and proof that you have for your belief that J-20 is using WS-15. Let me repeat my position: 1: J-20 might be able to supercruise, however it might not be able to supercruise, based on the pilot's...

actually the link I showed was about Sukhoi considering the Al-31FM2 for their aircraft, and that Salut had already demonstrated Al-31FM2 at 14,500 kgf in their test facility. The existence of this engine and its performance should not be in any doubt, the question is whether J-20 is using it...

The pilot never used the word "supercruise". The pilot said 一进了超音速(就是它的天下了), which translates to "once it enters supersonic speed"... Supersonic speed and supercruise are very different. If the pilot wanted to say that the J-20 could supercruise, the pilot would've used a different term...

I usually don't come onto PDF because I usually spend my time at SDF and CDF, however I think your interpretation of the pilot's words are a bit too confident. The pilot does indeed say that subsonic maneuverability is good, and supersonic maneuverability is excellent. However, the pilot never...

Cutting manpower just to equip all of them with top of the line weaponary is superlative. I mean the PLA won't need this gun for patrols with most countries they share borders nor for most of their current missions... I'm pretty sure they dont' need it against mongolia :P It'll be like...