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On Sep 16, 4:54*pm, Tony Verhulst wrote:
Mike the Strike wrote:
..... difficulty
touching the screen of a PDA in our *turbulent western air.

I'm wondering how a trackball would work here.

Tony

Tony,

The trackball I am using with the Ultimate is a Micro Track handheld
trackball, it fits easily in your hand, move the ball with your
thumb . It works very well with either hand and the mouse arrow does
not move when you take you thumb off the ball. I perfer it to the
touch screen input especially in turbulence.

Please see pictures http://www.craggyaero.com/ultimate.htm .

Any USB mouse type input will work with the Utimate. I have tried a
larger ball track mouse but could not find a suitable place to put it
and did not like it as well as the handheld. I guess you could strap
it to your leg. I have also looked at a joystick type mouse, but they
are very expensive.

Richard
www.craggyaero.com