Police Helicopter loss of tailrotor authority 2019

[FH1100 Pilot]

Originally Posted by [email protected]

When you are in the situation of full left pedal and still yawing right, the only thing that will save you is when the aircraft weathercocks back into wind and the aerodynamics move you back to the pedal curve by dint of the new wind azimuth...

How's about reducing torque? Doesn't take much of a torque reduction (sometimes) - if you have the altitude, of course. If not, as you say, the rotation may not stop until it's pointed back into the wind.

[Robbiee]

Originally Posted by FH1100 Pilot

How's about reducing torque? Doesn't take much of a torque reduction (sometimes) - if you have the altitude, of course. If not, as you say, the rotation may not stop until it's pointed back into the wind.

That's what my Robby POH says for right yaw that cannot be corrected by full left pedal. Does this change when you get into a turbine?

[[email protected]]

That's what my Robby POH says for right yaw that cannot be corrected by full left pedal. Does this change when you get into a turbine?

no it doesn't - FH 1100 is quite right but that requires you to have the height to do so, not something the video crew had nor when I was put into the same position in Cyprus. In my case only diving airspeed on (and turning away from the mountain) allowed me to regain yaw control.

[Robbiee]

Originally Posted by [email protected]

no it doesn't - FH 1100 is quite right but that requires you to have the height to do so, not something the video crew had nor when I was put into the same position in Cyprus. In my case only diving airspeed on (and turning away from the mountain) allowed me to regain yaw control.

Yes, it does.

[llamaman]

Originally Posted by DOUBLE BOGEY

There is no such thing as LTE. Its a Myth!
This looks like a classic RH pedal turn in a B212/412 (Torque Turn) followed by a failure to enter sufficient left pedal (power Pedal) to stop the yaw.
There is not a helicopter built that the yaw cannot be stopped if sufficient pedal is applied.
There are no aerodynamic conditions that equate to LTE or TR Stall.

Have you flown the Mi-8/Mi-17?!

[megan]

Crab, never flew the Wessex but we had them in the fleet, maybe whence the procedure was developed for the Huey. Simple and I don't know why similar gouges are not developed for other types, potential to save on bent metal.

[llamaman]

Originally Posted by DOUBLE BOGEY

There is no such thing as LTE. Its a Myth!
This looks like a classic RH pedal turn in a B212/412 (Torque Turn) followed by a failure to enter sufficient left pedal (power Pedal) to stop the yaw.
There is not a helicopter built that the yaw cannot be stopped if sufficient pedal is applied.
There are no aerodynamic conditions that equate to LTE or TR Stall.

Have you flown Mi-8 or Mi-17?!

[eagle 86]

"B" model do a full power check at or above pad height- bleed 200 n2 and not exceed 50psi difficult in a "B".
60kias flyby - 3psi or more IGE approach. 8psi or more OGE approach.
"H" model worked out on n1 margins as 50psi limit reached in most cases except places such as PNG.
Exciting to watch a test pilot trying to top an "H" at Canberra in mid winter.
E86