Dual linked yoke and elevator trim

[npbosch]

GuysI want to know what you think of this idea. As you agree the controls are extremely important to have a good feeling. Flying by hand is fun.I decided to redo my present yoke and make a dual one.The attached pic is form the site of juan cordon. I am planning to adjust it a bit. The pink line is a spindle (will be driven by a stepper/dc motor).The spindle will move a little table (light brown). The yoke will ne attached with 2 springs (green) to the table.In neutral position the table is in the middle, both springs have the same tension. After take of, the pilot pulls the yoke to him. Tension on the right spring in the pic increases. The lower the tension, you adjust the electrical trim. That switch let the motor turn the spindle counterclockwise and the table moves to the left, lowering the tension on the spring. If the pilot feels that there is no tension anymore on the colum he can release the button.For simplicity , I would like to drive the motor directly via the mom-of-mom toggle switch in the yoke. So for this part no interface card is needed. I know that a stepper motor needs some electronics to drive it (darlington array?),From a mechanical point of view, I think this would work , and is very simple to build. But I am by far an electronic expert. Is there anybody here who made something like this? Who can help on the electronic part?regardsNorberthttp://home.wanadoo.nl/norbert.boschhttp://forums.avsim.net/user_files/159127.jpg

[Guest MikePowell]

Norbert,It would not be difficult to develop simple electronics to drive a stepping motor. However, I think there is a less expensive option. Buy a low cost battery operated drill. No electronics required. Cut off the handle and rewire the switches.Mikewww.mikesflightdeck.comwww.mikesflightdeckbooks.com

[npbosch]

MikeI thought about that too. I do not want to change batteries all the time, but I can wire 12 V to it I think.But how do you change the direction the drill turns? Normally you push to a rod. Do you think that is connected to a switch? I never opened such a drill. Perhaps I will buy an old one on Ebay( a cheap one without battery) and disassemble it.regardsNorbert

[Guest MikePowell]

Norbert,The drill I have has a reverse switch on the back. Even if a drill does not have a switch, it should be possible to reverse the direction by reversing the polarity of power feeding the motor.Mikewww.mikesflightdeck.comwww.mikesflightdeckbooks.com