Excellent tips from Crab...straight out of the users handbook! Good advice.
This "thing" about "fenestron stall". There are several theories about the characteristics of the gazelles turning traits at very low speed [not necessarily in the hover].
The important thing to understand is:
The fenestron does 'mask' the airflow occasionally feeding into the tail rotor. It is NOT catastrophic and this is the thing to remember. What happens is the rate of turn accelerates faster than many pilots are used to and they panic expecting the a/c to rotate out of control.
IF a pilot did nothing, the a/c would initially continue to accelerate [vastly exceeding the manuals 60 degrees per second limit - if my memory serves me right]. and eventually recover.
However what most inexperienced pilots would do is probably back off with the pedal input that initiated the turn which of course would allow the rotation to continue to accelerate. The pilot then gives up and either the helo crashes from a hover (which I've seen once) or spirals slowly earthward into the deck! (which I witnessed once - A.G. - sharks practice - torque turn).
This is the recovery process: Whichever way the a/c is rapidly rotating, put in OPPOSITE pedal - LOTS of it and HOLD IT. The a/c will then recover.
Do not be put off by the excessive rotation you will be experiencing whie doing this!!!
Other than this 'dodgy' trait, the Gazelle is rapidly becoming a ferrari classic in the civvy world and IF you can afford to run it - a beautiful and rewarding machine to own.
Fully aerobatic (believe me) but obviously under normal civvy rules totally illegal.