On Tuesday, February 26, 2013 9:47:24 AM UTC-7, Dan Marotta wrote:
"Bill D" wrote in message

...

On Monday, February 25, 2013 5:04:31 PM UTC-7, Dan Marotta wrote:



Way back when, I tried the "benign spiral" in my LS-6a. I found it to be



dynamically unstable in pitch and, after a few cycles without touching

the



stick, it was ready to loop or break Vne.



Did you use full dive brakes?



To tell the truth, I don't recall - probably not. I think I used the

published (in Soaring) procedure but I don't remember if it called for full

dive brakes.

My understanding of the "benign spiral" is the air brakes MUST be open to stabilize the glider and prevent over speed.