On 30 Jan 2006 19:48:03 -0800, wrote:

Derek,

You may want to review some videos on my website. I am continuing
flight testing to determine the minimum slip angles and control inputs
to produce spin entries in several different ships. I expect, however,
that an open class glider would be especially subject to the condition
I've described.

http://ocglider.com/Grob_spin_avis.htm

I would prefer that you not share this link with the group. You may
distribute it to others who may backchannel you on this subject. That
will keep interest within my bandwidth limits.

Thanks

Chris O'Callaghan


I confess I went and looked at your videos. Very interesting indeed.

I have some difficulty understanding what the yaw string is
indicating. It appears the glider falls off in the direction of the
pre-stall bank. I would have expected a slipping stall/spin to fall
off in the direction of the applied rudder instead. In the case of a
slipping stall I would have thought this would be opposite the
direction of the pre-stall bank. Learn something evey day.