> Someone wrote:
> While searching for heli related stuff I came across a this
> tiny heli. No servos and no swashplate. How the hell does
> that work then?
> I'd love to have a go at scratch building a small heli. But
> not quite that small.
> Anyone have any ideas on how it operates with no
> swashplate. Or servos for that matter. Maybe small
> proportional actuators instead of servos??
One idea would be to have solenoids/coils acting on small
magnets attached to the fly bars.
Easy enough to run two wires up the middle of the shaft.
Have slip rings/brushes on the bottom of the shaft to
carry the power. Have an optical detector so you know
when to enegize the coil. Alternativly have a 2 contact
comutator and 4 brushes. Then you don't even need to
detect the angular position. Enegise one set of brushes
for fore/aft the other for left/right.
But looking at the video I am not too sure the cute
little heli HAS that many degrees of fredom. Maybe it
just takes off and goes FWD. Your only controls being
up/down and rotate left and right.
Neither of these have swashplates and they are stable.
Not a big stretch of the imagination to make their
natural attitude a FWD tilt and then you only need to
control the tail rotor for direction control.
If I made a tiny heli (and I couldn't because I am
hopeless) I would show it off in the video going
backwards and hovering. Wouldn't you ?