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A comment on The Soviet Union’s Flawed Rival to Concorde. Parent comment

Re:The Soviet Union’s Flawed Rival to Concorde by bllguo on Wednesday October 18, 2017 @04:25PM (#15502645)
What? Surely you mean perpendicular to the path? Or does path mean something different from trajectory..?
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Re:The Soviet Union’s Flawed Rival to Concorde by btilly on Wednesday October 18, 2017 @06:08PM (#15503672)
I do mean perpendicular, sorry.
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