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In 1979, Northrop began studies for a low-observable strategic bomber that would eventually result in the B-2 “Spirit” stealth bomber as we know it.
However, in the early days, two basic mission profiles were studied for the new aircraft: high altitude penetration and low altitude penetration.
High altitude penetration allowed a much more efficient aircraft and resulted in the genesis of the B-2’s long-span flying wing; eventually, the high-altitude penetrator flying wing was selected and modified to fill the low-altitude penetrator role.
Based on the research and the subsequent Autocad line drawings by Scott Lowther over at Aerospaceprojectsreview.com, Kurt Beswick has illustrated the Northrop LAP (Low Altitude Penetrator) concept that you can find in this post (please note that although the B-2 was the successor of the high and low altitude penetrator concepts, the artist has dubbed it “B-2 LAP,” a designation we have kept in this article.)
Vaguely reminding a Boeing study for a low-altitude stealth bomber dating back to 1979 Beswick’s LAP is a reviewed version of what is believed to be the basic design on which Northrop’s low altitude penetrator studies focused back in the 1970s.
Low Altitude Penetrator