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A comment on Boom (YC W16) – Supersonic Passenger Airplanes. Parent comment

Re:Boom (YC W16) – Supersonic Passenger Airplanes by jerf on Monday March 21, 2016 @01:17PM (#11329716)
"Unless you're worried that they're actually going to try to build an airplane out of cardboard"

I dunno. They do say "carbon fiber" a lot... and that is a description of cardboard....

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Re:Boom (YC W16) – Supersonic Passenger Airplanes by toomuchtodo on Monday March 21, 2016 @01:30PM (#11329888)
Carbon fiber is incredibly strong when engineered properly:

"During the test, the wings on the 787 were flexed upward “approximately 25 feet” which equates to 150 percent of the most extreme forces the airplane is ever expected to encounter during normal operation. The test is used to demonstrate a safety margin for the design and is part of the certification process to show the airplane can withstand extreme forces."

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Re:Boom (YC W16) – Supersonic Passenger Airplanes by david-given on Monday March 21, 2016 @02:01PM (#11330175)
I don't know what a foot is any more, but here's a video of the A380 doing its wing flex test:

https://www.youtube.com/watch?v=B74_w3Ar9nI

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