Originally Posted by
Ovc000
Not knowing the real cause of the accident of course but the pilot surely doesn't have a good scanning technique missing the 80% Rrpm and that bright orange light indicating low Rrpm.
I've hade Bose and Lightspeed ANR and never failed to hear the low Rrpm horn in a Robbie or any other heli with warning sounds. You can even hear the Rrpm's once you get some flying hours.
True. In my manual throttle S-300C 80% would come down to a measly 2480 ERPMs, defnitely an alerting change in ambient noise, even for a student / casual pilot.
Originally Posted by
Ovc000
Don't know if this R44 was carbureted or not otherwise carb icing could even be a cause. Still all easily to spot with a good scan (part of proper training).
Interesting thought! It is this one
https://www.jetphotos.com/photo/keyword/G-ODOC R44 Astro S#0372