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@MADDOG , does these strange member right?I have a gut feeling that the prototype we've seen won't be the prototype that will do the 1st flight.
1) They're aiming to fly this prototype. A good amount of work has gone to the current airframe, and with no major setbacks I don't see why they wouldn't fly GTU-0.@MADDOG , does these strange member right?
I asked a question about the prototype and the final version and possible design changes. They say, no significant changes.
LRIP and the final ones which goes into serial production.1) They're aiming to fly this prototype. A good amount of work has gone to the current airframe, and with no major setbacks I don't see why they wouldn't fly GTU-0.
2) Are you referring to the LRIP aircraft or simply the differences between this prototype and the upcoming ones?
Well of course it won't be a completely new aircraft. And from the 3rd aircraft onwards I expect to come across much more limited design variations resulting in fewer differences in-between prototypes as well as initial production aircraft. The main topic of discussion here is what changes would be considered "fundamental". A drastic change in the eyes of aerodynamicists could be the slight widening of the aft fuselage, whereas for the general audience a drastic change could be the re-positioning of the vertical stabilizers to the side booms or the implementation of a Raptor-like empennage etc. The same goes for people who work on different departments for the MMU program. A slight change for them might end up being drastic for others. This argument can be manipulated and twisted in a variety of ways. There will be changes for sure, but I find it unnecessary to dive into how "drastic" these changes might end up being. Since we are still talking within the compounds of the MMU program, it is only natural for these changes to not be greatly significant. The evolution of Hürkuş is a good enough example to this in my eyes. The most recent (as in it continuously goes through modifications) -B variant flying out there is the most experimental they've been so far. And mind you this comes after CDR. Even so, we can safely regard it as being the same platform with raked wingtips, an altered tailplane and an extended dorsal fin. TAI has gone through many revisions and a bunch of wingtip devices throughout Hürkuş' development but that is out of context. All in all, I believe it is relatively difficult for us to speak of these changes and properly categorize them as such. But changes are a given, and they will happen.LRIP and the final ones which goes into serial production.
Vertical stabilizers are there because they need to align with diverter plates for stealth don't they? Otherwise they would have to maybe align with outer side of inlet like su 57 and that would be a bit too farWell of course it won't be a completely new aircraft. And from the 3rd aircraft onwards I expect to come across much more limited design variations resulting in fewer differences in-between prototypes as well as initial production aircraft. The main topic of discussion here is what changes would be considered "fundamental". A drastic change in the eyes of aerodynamicists could be the slight widening of the aft fuselage, whereas for the general audience a drastic change could be the re-positioning of the vertical stabilizers to the side booms or the implementation of a Raptor-like empennage etc. The same goes for people who work on different departments for the MMU program. A slight change for them might end up being drastic for others. This argument can be manipulated and twisted in a variety of ways. There will be changes for sure, but I find it unnecessary to dive into how "drastic" these changes might end up being. Since we are still talking within the compounds of the MMU program, it is only natural for these changes to not be greatly significant. The evolution of Hürkuş is a good enough example to this in my eyes. The most recent (as in it continuously goes through modifications) -B variant flying out there is the most experimental they've been so far. And mind you this comes after CDR. Even so, we can safely regard it as being the same platform with raked wingtips, an altered tailplane and an extended dorsal fin. TAI has gone through many revisions and a bunch of wingtip devices throughout Hürkuş' development but that is out of context. All in all, I believe it is relatively difficult for us to speak of these changes and properly categorize them as such. But changes are a given, and they will happen.
That is in essence true. Regarding MMU (without getting into detail ofc), the stabs are positioned in such a way both for RCS measures and equipment placement intricacies. The current plan is to keep them as they are.Vertical stabilizers are there because they need to align with diverter plates for stealth don't they? Otherwise they would have to maybe align with outer side of inlet like su 57 and that would be a bit too far
I've found a really detailed answer about stealth characteristics, in thsi case around J20. If you are curious.
Why is J-20 believed to be stealthy even with not-in-plane canard and ventral fin? What design features onboard convince experts that J-2...
Answer (1 of 9): This question is conclusively answered by A Preliminary Assessment of Specular Radar Cross Section Performance in the Chengdu J-20 Prototype from Dr. Michael Pelosi and Dr. Carlo Kopp of Air Power Australia. They used Physical Optics simulation algorithm to calculate the Radar Cr...www.quora.com
You might also like this drawing I foundThank you for sharing this. Very informative article. However, looks like he failed to adress two primary criticism on J-20's stealth characteristic.
*Canard Movement.
*Vertical stabilizer Movement.
You might also like this drawing I found
no , it can block the entrance and demage the way but will be temporary , Just few hours and everything will be fixed .A Relatively easy way to neutralize an underground airbase is to attack the entry/exist points with heavy missile strikes. It will collapse the strcuture and block it on its face.
no , it can block the entrance and demage the way but will be temporary , Just few hours and everything will be fixed .