On Saturday, August 26, 2017 at 6:15:08 AM UTC-4, Dave Walsh wrote:
Another comment: the only vicious and totally-unexpected spin
entry I ever...

Well that sounds horrible! Are pylon powered sailplane
manufacturers required to demonstrate spin recovery with the
engine out and stopped?

All pylon-drive machines suffer some degradation of tail effectiveness
because of the pylon wake, much worse with a big radiator as in gas
powered machines. The V2cm in plummet-mode is not real stable in yaw
with much reduced elevator and rudder authority, and I was specifically
warned to be extremely careful with this configuration...