I recently did an Enstrom Type conversion and the instructor could not get any sort of VRS, even when lifting the lever from the bottom in low speed auto to 38 inches MP. The aircraft just stopped decending and started to climb. No fuss. He had several goes all with the same result. This was NOT the case last time I did it in a R44. Anyone got any ideas why the difference? Articulated vs teetering? Rotor RPM? Conditions on the day?
I have no idea.