Built in 1952 by the Douglas Aircraft Company, the X-3 Stiletto was an experimental jet aircraft developed to test the feasibility of low-aspect ratio wings and the large-scale use of titanium in aircraft structures.
https://www.youtube.com/watch?v=-dcrQDg-TIA
More:
https://www.nasa.gov/centers/armstro...-077-DFRC.html
Previously:
https://www.homemadetools.net/forum/...693#post128791
https://www.homemadetools.net/forum/...043#post125512
https://www.homemadetools.net/forum/...301#post126898