It is CRAZY !
The first purpose-designed airplane for inverted flight was probably a Grade monoplane which flew first in
the spring of 1914.The Grade Eindecker had landing gear on top and bottom.
Some named it the "Tweer monoplane", but it was actually built by the Grade aircraft factory right after the inverted
flying craze was started by Pegoud in 1913.
Gustav Tweer was an aerobatics pilot (one of many at this time), who was famous for diving his airplane almost
into the ground at flight shows.
Tweer monoplane - Германия - 1914
THE LATEST IDEA FOR LOOPING THE LOOP. - Pilot Gustav Tweer has been making trial flights on the above machine,
constructed so that he can land upside down if necessary, having, as is seen, chassis and wheels both above and
below the plaaes. He has been flying this machine at Bork.
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http://flyingmachines.ru/Site2/Arts/Art4713.htm--- More here (in German) --
https://www.noz.de/lokales/osnabrueck/artikel/470826/april-1914-osnabrucker-flieger-begeistert-die-nationBUT
Monty Python is still funny too !