Challenge: Weird Aircraft Designs

I want to see that fly

Here the Snecma C-450 Coléoptère
the only ringwing VTOL that ever fly

Why a wing in form of ring ?
the wingtip produce drag and turbulence. wat slow down a Aircraft
with out wingtips the Aircraft get much faster. (up mach 3 and faster)

c450_14.jpg

c450_15.jpg


Note on C-450 Coléoptère
this was a French tailsiter VTOL design
the only prototype crash in testflight during landing

c450_28.jpg
 
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