Eric Greenwell wrote:

Matt writes:

3) 30 deg. bank causes glider to start turning. TruTrak catches up and
shows 30 deg. bank.

Stefan replies:
4 x yes.

Is that really right? How does this instrument know the bank angle?
Using the calculator at

http://www.soarcsa.org/thinking_page..._rad_knots.htm

I get these figures:

* 100 knots, 15 degrees bank, 2 minute turn indication
* 50 knots, 15 degree bank, 1 minute turn indication

So, for the same bank angle, won't the "bank indication" (which I think
is really turn rate indication) be different?

I don't know about the numbers, but my "1 minute turn" TruTrak seems to
exactly match the actual horizon at thermalling speeds.