Re: What caused this crash?


"Bob Chilcoat" <viewptmd@xxxxxxxxxxxxxxxxxxx> wrote in message
news:opzXe.29155$TA2.20446@xxxxxxxxxxx
> Look at the trees in the background (well away from the rotor wash). It
> was windy as hell. That was probably partly responsible for all the
> trouble the pilot had after first lifting off. Then getting out into the
> street where it was too narrow, coupled with the heavy weight, low power
> and high DA, and it was just too many problems lined up.
>
The wind would be beneficial. Hovering into a 15 K wind has the same effect
as flying forward at 15 K in a calm wind.
Passing through this speed, the helicopter experiences translational lift
(flying in relatively smoother air, not the recirculated tip vortices from
the main rotor). Power required is less in ETL (effective translational
lift). It appears that he still didn't have enough power to clear the
obstacles (trees). Too much weight for the existing conditions.

The pilot didn't really have any trouble hovering. While in ground effect
(within 1 rotor diameter of the ground), power requirements are lower. He
just didn't have enough power to climb. He should have aborted the takeoff.

Kris


.

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