Go to http://www.rcplaneresource.com.com/ and join the forum. You'll find a lot of like-minded people over there, myself included.
> 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 ?
Th heli does sit on a bubble in ground effect. Trouble is the bubble keeps shooting out of the side, making thing worse.
I made an Electro magnetic swash plate a few years back now and it worked really well.
This is about a year after the initial post for this thread was made but www.hobbytron.com is selling a 2 channel 10 gram heli for $50. I think its always moving forwards so you just get control of the height and right/left movements.
I'm new around here, having just started seriously researching with a view to building a home CNC router - and I came across this thread.
Well one of my other hobbies is R/C Helicopters - and I my website hosts a pretty exhaustive guide for those just starting out with electric helis. You may find it interesting.
and look for EHBG (Electric Helicopter Beginners Guide)
Now back to what I was meant to be doing here
All the best
Don't know if this has been posted yet but the Patent is no secret (but protected by Patent laws of course ;-)
Very clever - commutator switched motors