Curtis Olson wrote:

> On 1/10/07, Martin Spott <[EMAIL PROTECTED] 
> <mailto:[EMAIL PROTECTED]>> wrote:
>
>     Yup, this is not really new to me as I've been already trying
>     different
>     yokes and rudder pedals with different simulated C172's. This is why I
>     was asking for the type of the pedals, because according to my
>     experience the pedals that people tend to have are the most
>     'disgusting' piece in the so called modern PC-based flight simulation.
>
>
>
> Yes, you are probably going to need to spend several thousand $$$ to 
> get a really nice set of pedals ... and that is without any active 
> control loading which doesn't help you on engine out situations in a 
> multiengine plane.  There is a company called Real Simulation (in 
> Spain I believe) that makes a lot of really nice jet fighter style 
> controls and enclosures.  http://www.realsimulator.com/

>
>
> Was looking into active control loading ... there is a company called 
> Wittenstein (sp?) that quoted us $100,000 for a 3 axis system ... 
> ouch!  I know a guy here where I work who has done a lot of force 
> feedback control in the context of land based vehicles which is pretty 
> analogous, so I think we might try to build something ourselves and 
> see how far that gets us.  I know another guy (Hi Jack) :-) who might 
> be able to do it all with R/C servos powered from a USB port, but the 
> resulting forces might be on the light side of the spectrum. :-)

DC motors would work better, but hacking a servo is cheaper and the 
software is simpler as the servo electronics help with setting and 
controlling the PWM to the servo.

Actually, I can run up to Mirage dry lake bed and get a set of Boeing 
style rudder pedals for around 300 dollars from a 727/747 carcass.   Add 
a few pressure transducers and positional pots and you have differential 
braking/steering for probably less than a K.  Force feedback is another 
question, but that can be worked.  Attach a yoke or collar assembly to 
the pedal pivot point attached to opposing compression springs. Extend 
or shorten the spring stop points with  some with some sort of 
turnbuckle arrangement. Vary the position(s) as a function of Q, g, AOA, 
or phases of the moon  or whatever. ;-)  Idea is to avoid messy 
hydraulics and all the problems that entails. It has been on my list of 
things to do for some time now, maybe this year.....

Curt, I'll send you a URL of a small company up in Palmdale that might 
be able to help you. I don't have it at the moment.

Regards
John W.




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