Space shuttle breaking the sound barrier.
https://diqn32j8nouaz.cloudfront.net...nd_barrier.jpg
Previously:
https://www.homemadetools.net/forum/...576#post147456
https://www.homemadetools.net/forum/...394#post127209
https://www.homemadetools.net/forum/...043#post125512
https://www.homemadetools.net/forum/...3736#post99893
