J-20 5th Generation Fighter VII

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mig-31

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Blitzo said:
There is a slight taper at the base of the housing, which I suspect is to blend with the ventral nose/fuselage better, but if you look at other images, it's clear that it is overall flat.

a3cWV7a.png
Click to expand...
I know the curve is not prominent
It seem that the back part is clearly curved
the side window are flat
I just wonder if there is a curve at all for the frontal window or only the housing is curved
 
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Blitzo

Blitzo

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mig-31 said:
I know the curve is not prominent
It seem that the back part is clearly curved
the side window are flat
I just wonder if there is a curve at all for the frontal window or only the housing is curved
Click to expand...

Your question mentioned nothing about the frontal window, you wrote:
"I have a question, regarding the IRST/EOTS of J-20. Is the window a flat or a curved surface?, it look to me that the window is slightly curved but iam not sure if iam correct on that"


It was not particularly specific at all.

As for the exact geometry, we don't have an answer at that level of specificity because we only have pictures to go off rather than the real three dimensional object.
 
Blitzo

Blitzo

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mig-31 said:
Do you have additional images of the J-20 EOTS?
Click to expand...

I have a few, but none that would add any more detail than the pictures that have already been posted.

I'm not sure why this specific detail is something you are obsessing over, but I don't think you're going to find the answer in the public space.
 
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taxiya

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mig-31 said:
I'm trying to make a 3D model for J-20. And I'm confusing whether the window should be more like this
View attachment 99179

Or more like this
View attachment 99180
Click to expand...
The windows are flat.

I believe that you know when a flat surface intersect with a curved surface, the border is a complex curve.

The curves that you saw in all photos including the ones that you posted are curves of the EOTS frame intersecting with the fuselage which is curved everywhere. Your 3D model is wrong in that it assumes the underside of the fuselage being flat which is not.

Your attempt in the 2nd photo shows that you attempted to solve the "problem" by making the EOTS module curved. Instead of doing that you should have made the fuselage a curve, then put flat surfaced EOTS onto it, you will get the curve like J-20.
 
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