I am in the process of building my own design of (draganflyer)
its a 4 motor/rotor flying saucer simplest way to describe it is like an X with a rotor on each end

I want to be able to control lift that is all for motors equal in speed using the throttle lever on a 4 cha transmitter
then forward motion by increasing the rear motor and decreasing the front at the same time
I want to control roll by increasing the left motor and decreasing the right equally as to keep altitude
and control yaw by slowing down 2 opposing rotors . I know this looks complicated but I am sure there is a simple solution
This can be done by custom electronics but I want to build a prototype first just by plugging bit together.
If this cant be dont is there a transmitter that cant mix up to 4 channels together for each function on a 4 channel transmitter. Sorry if the explaination is a bit vague, not my strong point. Thank you in advance. Mark

Hello there,

Send me some pictures/specification of your engines and electronics if you like....

Your mixing requirements go far beyond what 99.9% of the R/C population would ever want to do. Finding someone with the expertise to help you out is going to be difficult, if not impossible.

What I do know is that most advanced computer transmitters are only capable of mixing two channels together. In fact, I don't know of any that do three, let alone four. There might be one, I just don't know about it is all....

You didn't say what radio you have.

Later;

D.W.

You can build a simple (relativley) circuit to do just that. I have made something similar, electronices wise, but it could not be implented in what you are doing.

The other option is to build a mechanical mixer. either system would be relatley simple, you just need a logical mind.

I think that is a pretty challenging project. You'll need a controller (microprocessor??) to take in feedback signals from an accelerometer and gyro and then adjust the speed of hte motors accordingly (otherwise it wont be stable in the least). I would imagine that this processor would do the mixing for you. I know this because i have considered doing a project like this, and then ditched it because it'd be too difficult for what i have time for. If you are going to continue on this project, Microchip makes some really cool and inexpensive processors you may want to consider using. Good Luck! Make sure you post pics if you get it going!

-Dan

Do a search for "roswell flyer" it is what you discribe.

I am building my prototype of the rosswel/dragan/x-flyer at this very moment.

Yes, it is slightly complicated but not impossible, you have to take your time...
You shouldn't want to do this with a highly sophisticated programmable transmitter.
A cheap of-the-shelf 4-canal transmitter will do.
What you do need is a micrcontroller, or in my case 2pcs. Three gyro's are needed for the stability in every axis.
Furthermore you need 4 solid speed controllers who can handle sufficient current.

The airframe is ready, including the hardware. The software has been written but not yet tested.

So the hardware contains:
1x Receiver
2x Microchip uC
3x ceramic gyro
12x Low ohmic FET
4x Schottky diode

The total is amount of components on the PCB is 110!

Is there is anyone curious about this kind of rotorcrafts let me know.

Greetings,