Twin 1,
A helicopter with a really really rigid rotor located below the 'fuselage', is extremely stable. In fact, it is too stable. As the forward speed increases the drag of the fuselage resists the necessary forward tip of the disk.
Two examples are:-
http://www.flying-platform.com/ and
http://www.hiller.org/exhibits/onlin...-platform.html
RW-1 & heedm
>
When discussing inverted forward flight, or even an inverted hover for full scale, I also tend to wonder "Why?" <
The
UniCopter is intended to fly inverted. This feature is for use during combat. When attacking, the helicopter performs barrel rolls. This causes the enemies to laugh so hard that they can't hold their weapons steady.
