Andromeda

Interesting points about flyability of the vipers.
I asked the same questions years ago to my next door neighbor who is (retired) an
Aviation engineer. original viper would never get of the ground
the anhedral angle of the wings are too steep, wing area is to small to generate
enough lift. the drag caused by the engines and the nose section would be far to great
for the the lift generated by the wings to over come.

If it could fly, the engines would need to be insanely powerful with a huge airfoil camber
and thickness. power generated by the top engine wouldn't be as effective because
the intake is restricted by the cockpit

take off speed would be in excess of 500kph. Landing and stall speeds just as high.
Without canard wings, as it approaches take off speed would flip over on its back
like an F1 car because of the taper on the nose section. that would push the nose up.

If your interested, when i get home I'll find pictures of the vipers i came up with
to make them flyable.

edit: original vipers center of gravity is about a meter behind the cockpit behind the
root of the leading edge of the wings