I have to correct my self: the actual angle of rotation is indeed about 90° to both sides, so 180° in summary.
I have contacted an ATPL student and a real world 737NG pilot and both confirmed this. :cool:
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Obviously there is some wrong information out there that can lead to this idea of a 50° rotation angle:
1)
simulator video at 8.45 and 10:00
2) At this website it says also 50°:
http://www.737ngproject.be/Yoke.htm
(great site by the way despite of this wrong information)
3) PMDG´s Virtual Cockpit
... :-o
But again: that is not correct! The actual angle is 90° to both sides.