I tried to use the tail chute twice in my H-301 Libelle. First time was during an off field landing, I pulled the chute and stuffed the nose down...........next thing I knew I was scooting through the weeds doing 80. The chute hadn't deployed! Next time I gave it a try was a landing at Winnemucca, Nv. I popped the chute on down-wind and soon found I was going to be way short, so I pulled the jettison handle..............you guessed it, it didn't jettison! I made the runway, but was a half mile from my desired stopping point. The chute worked fine on the ground, before and after both incidents. My conclusion, unreliable and not necessary in a ship that had landing flaps and dive brakes.
FWIW,
JJ