Why does some planes such a funny moving (a specialy from WW1).
www.gyros.biz/lecture/wmv/4.wmv
The point of a gyro is that it is very sensitive to external forces see http://www.gyroscope.com/youtube.asp?movie=dCcfKBfmyP4 on the second link you used
I wasn’t aware that they’d been developed in WWI, or earlier.
More info here: http://www.allstar.fiu.edu/aero/GSI.htm , or google gyro instruments
Also has a bearing on how powered aircraft handle chaps!.