Chengdu next gen combat aircraft (?J-36) thread

WaterbDoge

Just Hatched
Registered Member
I mean, the assumption that J-36 does not have high alpha manoeuvring requirements is entirely based on assumptions from last gen technology. The fact that it has 2 caret intake on the bottom when it could have 3 DSI intake on top, already shows it does infact have high alpha requirements.
I didn't mean it will fly like a bomber because I do know what you said from the first flight. I mean high angle of attack is still pretty achieveable on many fighters, so though a slat (if correct) was not unexpected in my opinion, I will still be curious to see such a plane doing such maneuvering, imaging this chasing 'small' fighters like a J10 will make things pretty funny.
 
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WaterbDoge

Just Hatched
Registered Member
I didn't mean it will fly like a bomber because I do know what you said from the first flight. I mean high angle of attack is still pretty achieveable on many fighters, so though a slat (if correct) was not unexpected in my opinion, I will still be curious to see such a plane doing such maneuvering, imaging this chasing 'small' fighters like a J10 will make things pretty funny.
*I mean high angle of attack is still pretty achieveable on many fighters without slats
 

MC530

New Member
Registered Member
I didn't mean it will fly like a bomber because I do know what you said from the first flight. I mean high angle of attack is still pretty achieveable on many fighters, so though a slat (if correct) was not unexpected in my opinion, I will still be curious to see such a plane doing such maneuvering, imaging this chasing 'small' fighters like a J10 will make things pretty funny.
As amateurs, I really appreciate the exciting maneuvers of these tens of tons of man-made machinery at tens of thousands of feet, but it seems that the era of knight war has passed a long time ago. If faced with 3-5 high-power AESA radars at different angles at the same time, the only option for these low-observable fighters should be to leave immediately. It is difficult to imagine that these high-value fighter jets need to perform a high-risk over-stall maneuver to expose all angles of themselves to the opponent. This may even cause them to be accidentally damaged by long-range air-to-air missiles launched by their own teammates.
My thoughts exactly but there is a great hurry-geopolitical events especially with the hostile,erractic actions of rapidly declining USA who seeing China's rise not by war but innovation,stability,prosperity has us heading into great danger with war aimed at China on the horizon.CPC and PLA knows this and must speed development of all of it branches in order to ward off/defend/fight and win-absolutely NO complacency.
Although it is a good spirit to always be ready to defend the country. But now as a giant industrial country, we really shouldn’t worry about this problem. China is about 30 times the size of Vietnam and can produce almost all minerals and industrial products. As long as the Chinese are unwilling to admit defeat, this war will continue until it is unbearable for anyone. And it will not be like the Vietnam War. No country that participates in attacking China has the right to unilaterally withdraw from the war, and at the same time, it will suffer the consequences of retaliation.
Finally: China has just built 300 "wind power bases" in the northwest, allowing these "wind power equipment" to be moved to the United States at Mach 20 speeds if necessary.
This deviates too far from our J36 topic.
 

iBBz

Junior Member
Registered Member
The top inlet shouldn’t be an issue since it’s only feeding air to the middle engine. A choke condition for the top inlet doesn’t mean the plane will lose power.
Its not that simple. This is not like a turbocharger where you fix the problem with a blow-off valve. Going from providing sufficient airflow to the compressor to suddenly sucking the air right out of the compressor stages while they are still rotating, has the potential to destroy the engine. Since the engine is sitting inside the fuselage instead of being mounted to a nacelle, you really don't want it to blow up.
 

WaterbDoge

Just Hatched
Registered Member
As amateurs, I really appreciate the exciting maneuvers of these tens of tons of man-made machinery at tens of thousands of feet, but it seems that the era of knight war has passed a long time ago. If faced with 3-5 high-power AESA radars at different angles at the same time, the only option for these low-observable fighters should be to leave immediately. It is difficult to imagine that these high-value fighter jets need to perform a high-risk over-stall maneuver to expose all angles of themselves to the opponent. This may even cause them to be accidentally damaged by long-range air-to-air missiles launched by their own teammates.
Of course it won't be likely to happen, so I just mean imaging some stupid things, don't take my words too serious. But as long as CAC keeps some high maneuverability on J36, it will never be boring——I think you can understand that.
 

latenlazy

Brigadier
Its not that simple. This is not like a turbocharger where you fix the problem with a blow-off valve. Going from providing sufficient airflow to the compressor to suddenly sucking the air right out of the compressor stages while they are still rotating, has the potential to destroy the engine. Since the engine is sitting inside the fuselage instead of being mounted to a nacelle, you really don't want it to blow up.
This isn’t just an issue for a top inlet and should be a pretty standard part of any engine’s operational control system.
 

Nevermore

New Member
Registered Member
The two inlet ports on the belly support high angle maneuvers, but the inlet port on the back does not. If the intake of the middle engine is significantly reduced during flight, it can indeed cause engine failure or even serious damage.If high angle maneuvering is not possible, why not use all back air intakes, which is also quite strange.
 

ACuriousPLAFan

Brigadier
Registered Member
How long after first sighting of J-20 did it take to see a flight without the nose pitot tube?

Unlike the J-20 back then which went through both "2001" and "2011" stages - The J-36's first flight is done in "36011", meaning that the aircraft is very likely already an (EMD) prototype instead of just a technology demonstrator.

Assuming that the J-36 is going through the same process as the "2011" J-20:
2011 (with pitot tube) - First flight 1 March 2014 <<---
2012 (with pitot tube) - First flight 26 July 2014
2013 (without pitot tube) - First flight 29 November 2014 <<---
2015 (without pitot tube) - First flight 19 December 2014
2016 (without pitot tube) - First flight 18 September 2015
2017 (without pitot tube) - First flight 24 November 2015

So I suppose about 9 months.



Additional mention (of my own):
The first LRIP J-20 (2101) rolled off the assembly line sometime in late-2015. Assuming that point of time is late-December 2015, that's about 1 year and 10 months.

Assuming some de-buffs are applied (e.g. further technological improvement integrations and tests have to be conducted + anticipated complexity and difficulty associated with engineering 6th-gen systems) which lengthen said period to 3-3.5 years, that would mean the first LRIP J-36 unit should be ready for test-&-evaluation squadrons sometime between late-2027 and mid-2028.

This does line up with pretty well with the Adorable Whale's guess.
 
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latenlazy

Brigadier
Maybe there are internal ducts from the two side intakes to the central engine. The ducts will be open when the pressure in the middle duct gets too low?
Bleeds to manage the pressure inside the inlet is one of many common standard solutions to these sorts of problems. This is one of those things where the available solutions are all well known enough that the default assumption should be "they know what they're doing". I'd argue if this design wasn't meant to do higher alpha maneuvers they would have just stuck with top inlets for all the engines. They went through the trouble for a reason.
 
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