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Quite a lot of sources name the Valkyrie as an extremely high lift
over drag efficient aircraft. According to Wikipedia:
"This gave the Valkyrie the best lift:drag ratio of any powered manned
aircraft ever built and allowed a much better aspect ratio on take-off
and landing. Some recent SST designs are considering this as an
option."
Anyone knows l/dmax of the XB-70? Commercial airliners are around 1:18
while motorgliders (and the U2) come close to 1:30 An L/D of 1:30
seems impossible for an aircraft like the Valkyrie?
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L/D max of Valkyrie (the big fella)
