Originally Posted by
john_tullamarine
This the one ?
Yes, that's it. SR described it and his subsequent work when at Avalon some years ago.
Sean Roberts' excellent slideshow is available to download at flighttestsafety dot org/36-workshops/workshops?limit=4&start=16 look for
“Taming the Stall/Departure Characteristics of the Derringer D-1 Aircraft”
Some info there is relevant to this thread. Especially the bit about "
Adding power at the stall (FAA Training) can cause a departure and violates FAR certification criteria." The FAA has since amended their stall recovery procedure in Chapter 4 of the Airplane Flying Handbook and it seems that CASA is on track too with AC 61-16 and, hopefully, their future revised Flight Instructor Manual.