On Wednesday, January 21, 2015 at 12:09:05 PM UTC-6, wrote:

When I first came into this sport there was discussion of a device called THEMI that was supposed to tell us which way to turn in order to core a thermal. Some 35 years later I don't hear anything at all about that technology.

I used a Themi for about 10 years and it was a nice little thermalling aid (and a pretty good IGC logger). All it did was keep track of where the lift was and suggested which way to move your circle to center the thermal better. The only display was a couple of blinking lights that you could catch out of the corner of your eye, so no time was wasted looking at a display in the cockpit - which is what is going on now with all the thermal centering displays included in Winpilot, SeeYouMobile, etc.

My themi finally stopped getting a GPS lock (same problem as the VL?) and since I was getting to the point that I was out-guessing it most of the time, I took it out.

Kirk
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