Something for you instructors !!
Just for interest while talking about vortex ring. Last week did lesson 15 vortex ring with a student in a 300. Normal briefings and demos from 3000 ft. Asked the student to hold 18 inches MP and height so he obviously is pulling back the speed. As we came below about 20 kts ias with 18" the ac began its normal vibration followed by pitching and rolling with rod at 700fpm. Asked student to recover, he did by snapping the lever up to 25"map. I was't expecting his yank so couldn't initally couldn't overcome the increased pitch!!!!
The result was impressive language, a 300 falling back to mother earth on its side ( very unerving looking out of the side window directly down). To recover was full lever down and full forward cyclic, it took a long time to ( seemed) get the ac out of vrs with about 500 ft to spare before stuffing in.
Result now take a strong pair of cycle clips and alot of pressure on collective to stop it coming up !!! I would have to agree with other posts in incipient vrs cylic first, in full vrs collective down followed by cylic and hope you have the height !!