Explosive cord for knocking a hole in the canopy in event of ejection. Using explosive cord could save a lot of weight compared to tossing the whole canopy.
J-20 5th Generation Fighter VII
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Explosive cord for knocking a hole in the canopy in event of ejection. Using explosive cord could save a lot of weight compared to tossing the whole canopy.
Detonation cords to shatter the canopy before pilot ejection.
One of the hypothesized roles for the twin seater is as a commander of drones and less advanced fighters. If the J-20S is always flying with a group of much cheaper and less stealthy planes, then there is little benefit to making the J-20S as stealthy as possible when it is already so much more stealthy than the other planes that it will be flying with.
That is true and we do see some places where there seems to be improvements, e.g, the entire front edge of the intake is now one single continuous piece of composite material instead of 3 separate strips separately by slivers of metal at the corners of the intake.
Drones aren't good enough to be simply routinely 'commanded' something too complex yet. Simple missions - sure, pre-set complex missions - sure as well, but for complex orders "on fly" (for proper independent drones) we still need at least 1 operator per unit.
In complex operations loyal wingmen basically do sorta "distributed aircraft" thing, which assumes the presence of the twin-seater within the formation. Original idea was that such a concept works well even with single-seaters(just do as I do) - but there are multiple signs it doesn't, or fail to realize the potential of those aircraft.
J-20S is just the most prominent among those signs.
Spotted this video in the Science and Technology thread. It’s an interview with the guy responsible for developing the printing technique for the FC-31’s bulkheads and there’s a segment in it that actually helps answer why China is able to use large 3D printed structures as high load bearing parts. At around the 18:30 mark he and the interviewer inspect a magnified image of a 3D printed titanium part’s grain structure and he talks about how he has full control over the grain size, shape, and orientation in the printing process, and that in turn helps them control, even alter, the basic properties and characteristics of the material they are working with. In that particular image it seems they’ve created a titanium part with cross hatched grain microstructures that essentially reinforces the strength of the part. This is much more sophisticate, complex, and deliberate control of grain structures than I’ve seen from any open source materials investigating this aspect of 3D printing to improve material performance.
Good interview, his hair all turn white, time flies. Wang Huaming published a paper in 2009. This is the paper that all my posts are based on.
Active control on grain size, grain morphology and grain texture.
This is what you saw in the interview.
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