RC Micro heli.

[PaulH]

Go to http://www.rcplaneresource.com.com/ and join the forum. You'll find a lot of like-minded people over there, myself included.

[andrewm1973]

> Someone wrote:
> <snip>
> 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?
>
> http://pixelito.reference.be
>
> 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.

http://members.shaw.ca/climber/ff/ffchopstick.html
http://members.cox.net/arrio2/historic/penni.pdf

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 ?

andrewm

[andydagger]

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.

Andy

http://www.members.lycos.co.uk/palmheli/

[Smertrios]

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.

[MRP]

Hi guys,

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.

http://www.swashplate.co.uk

and look for EHBG (Electric Helicopter Beginners Guide)

Now back to what I was meant to be doing here

All the best

Mark

[sdpearce]

Don't know if this has been posted yet but the Patent is no secret (but protected by Patent laws of course ;-)

http://v3.espacenet.com/textdraw?IA=...QPN=WO03080433

Very clever - commutator switched motors

Enjoy,
Scott

[coltons customs]

Sounds familiar.... I can hop mine around the living room and that's about it. The highest it's been is about 12" from the floor and travelled about 3 feet. The box says from age 8. Yeh right?



That sounds like the only way to do it. I guess the electro magnets could be made proportional by varying the current.

keep trying