Northrop Grumman B-21 Raider (LRS-B)

Scott Kenny said:
Access panels for the big fecking antennas hiding in the leading edges. Whether for EW systems or LPI radars. or both.
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The leading edge is probably a suboptimal location for radar: there is minimal vertical room to shrink the beam vertically, which might result in suboptimal gain… EW antennas are definitely doable on the leading edge though, the F-35 has them.
 
Sundog said:
They may be using the bypass air from the fan as a sheet of cooler air between the main nozzle and the upper surface and the hot core flow to help keep the upper surface somewhat cool, as opposed to completely "wrapping" the bypass air around the core flow. Also, it looks like the rear nozzles may actually be slightly higher than the rear deck of the wing, as far forward as they are, raising them up a bit from the rear surface. I also noticed the upper surface of the nozzle on the B-21 is a pointed facet, as opposed to the V-cut on the B-2 to maybe also help mixing the core and bypass flows to cool it faster? Those are just some guesses as to what they may be doing at the exhaust.
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Boundary air may be farther down the inlet duct possibly?
flateric said:
It has, yes, along forward spar
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Cove panels.
 
JJPET said:
is it really a sensor/ towed decoy or some sort of UAP :)
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It's a trailing cone. Standard for flight tests. It also has a Pitot tube as well as SS+AoA vanes on the forward-facing boom to probe the air in a rather undisturbed part of the flow. These devices are there to provide data for the calibration of the air data system (anemometry)
 

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