Found and Explained Official on MSN

The flying pancake - The plane built to fly slower than anything else

Vought’s V-173 Flying Pancake was a World War II experiment built around an extremely low aspect ratio circular wing, ...
insider.si.edu

Chance Vought V-173 and XF5U-1 Flying Pancakes / [contributors, Art Schoeni ... et al.]

https://siris-libraries.si.edu/ipac20/ipac.jsp?&profile=liball&source=~!silibraries&uri=full=3100001~!510905~!0#focus ...