J-20 5th Gen Fighter Thread VIII
- Thread starter Blitzo
- Start date
Serrated edges in contrast to.... square/non-serrated edges?
There's always some gap between any two panels and the difference in conductivity between the aircraft's skin and the air creates a reflective boundary. If this boundary is a straight line, the radar wave would reflect back to the source, like a long wave coming from the sea striking a wall. The serrations scatter the waves away from the source.
Yes. I was wondering why those panels have zig-zag edges instead of straight edges.
Interesting. I had no idea the gap between two panels would have an effect on radar reflection.
It is a general visible design features on stealth aircraft that you do not want edges which are 90 degrees to incoming RF waves, but rather you want to deflect them.
On virtually all stealth aircraft (not only J-20), you can see serrations across panels and edges on an aircraft.
"Simulating emergency missile launch" <- Not an actual launch of a dummy round?
How is simulation dangerous? No, it is the launch of a missile under high G/high toll rate conditions. Test Pilot Li Gang explicitly stated that there was the danger of the missile accidentally striking the aircraft after it leaves bellybay, since the J-20 hasn’t attempted this IRL prior to the test.
Last edited:
by78
General
This reminds me of a Chengdu that might have something to do with the resigned nose. The patent is on a new nose cone shape that reduces drag in both subsonic and supersonic regimes. From mach 1.2 to mach 2, a drag reduction of around 10% can be achieved. Although the tip of the new nose design has a greater cross-sectional area that increases initial resistance, a more refined transition/curvature from the tip to the aft results in a net reduction in drag.
Wasn't there a scientific paper that was published showing that the beak like design would reduce drag? I remember seeing it posted in this forum.