Quote:
Originally Posted by svandamme
Thin air
In air both rotor and tail are equally chopping thin air
All torque counterbalanced
The mains goes over rock
Ground effect on rotor gives it extra torque on the mains.
While tail still spins in thin air thus lack of counter torque?
|
Rotor systems only see density of air, or DA.
DA affects engine, main rotor and tail rotor performance.
Now, in mission planning, power required calculations are made based on DA, gross vehicle weight, winds, etc.
I don’t see any ground effect due to winds, etc. GE actually helps the the entire power train.
Again, they lost tail rotor authority for any number of reasons, got really lucky, fell below the wind line (blocked by the terrain), regained tail rotor authority and we’re able to fly away.
That is my guess.
Amazing video.