3-axis control mixer?

[cluttonfred]

Hi, all. I am looking for a solution to an aircraft design problem but I am stuck. I am looking for a design for a ***three-axis*** mechanical control mixer. In other words, I am looking to provide elevator, aileron and rudder function from four tail-mounted control surfaces: horizontal surfaces up and down for pitch, vertical left and right for yaw and all four surfaces clockwise or counter-clockwise for roll. Any ideas or suggestions of aircraft, prototypes or projects that might put me on the right track? Cheers, Matthew

 

[starviking]

Hi, all. I am looking for a solution to an aircraft design problem but I am stuck. I am looking for a design for a ***three-axis*** mechanical control mixer. In other words, I am looking to provide elevator, aileron and rudder function from four tail-mounted control surfaces: horizontal surfaces up and down for pitch, vertical left and right for yaw and all four surfaces clockwise or counter-clockwise for roll. Any ideas or suggestions of aircraft, prototypes or projects that might put me on the right track? Cheers, Matthew

Some missiles may have used similar systems. V2 maybe?

 

[mz]

IIRC some German ww2 era aircraft with a prone pilot had no pedals. Maybe a Horten glider. Instead there was a yoke with two grips, one for each hand. IIRC all movements were coupled so could be done by either hand.

Something like this:
-Roll control: roll the stick to the side
-Pitch: pitch the stick forwards or backwards
-Yaw: Twist the grip. (Either hand can do it.) Maybe done with spoilers if it was a flying wing?

I found a Horten 1B mixer picture from my archives. It seems more like a regular single stick but might provide some clues...

 

[Richard N]

Take a look at the control system of the Peyret Tandem. It was a tandem wing airplane with flaperons on both sets of wings that were mechanically mixed. An illustrated article about it is here: http://www.flightglobal.com/pdfarchive/view/1922/1922%20-%200621.html The Peyret Tandem patent: http://www.google.com/patents/US1492262

 

[Richard N]

Something else to look at is electronic mixing done every day on radio controlled models. Computerized radio control transmitters can mix any channel with any other in any percentage along with dual rates and exponential settings. A friend of mine is the designer of this model. A thread about building and flying it is here on the RC Groups website: http://www.rcgroups.com/forums/showthread.php?t=1779446&highlight=Deltoid


http://www.youtube.com/watch?v=cwqHWp7IdIs http://www.youtube.com/watch?v=iVHLl9eHqpo

 

[cluttonfred]

Thanks, Richard, the Peyret geared system is quite neat but also just a two-axis mixer. Electronics are neat but not what I need, looking for a mechanical solution.