It's about time.
 

Only for those who don't have the time.. .__________________________. .. .<a href="http://www.unicopter.com/clock.htm" target="_blank">This web page</a> shows rotor and vortices. . .. .Moving the mouse shows the blade vortex interaction.. .__________________________. .. .Technical explanations requested.

That was fun for the first thrity or so seconds! <img border="0" title="" alt="[Big Grin]" src="biggrin.gif" /> . .. .....but I did not lose mouse effectiveness, nor get uncommanded mouse oscilations when attempting to achieve vortex ring state!! <img border="0" title="" alt="[Big Grin]" src="biggrin.gif" /> <img border="0" title="" alt="[Big Grin]" src="biggrin.gif" /> . .. ....oh, and the mouse did NOT suddenly fly off either!! <img border="0" title="" alt="[Big Grin]" src="biggrin.gif" /> <img border="0" title="" alt="[Big Grin]" src="biggrin.gif" /> <img border="0" title="" alt="[Big Grin]" src="biggrin.gif" />