Calling Nick Lappos - Blade Stall

[puntosaurus]

Thank you Senior Pilot for putting up with all of us. Good Night Rotorheads.

[Senior Pilot]

Originally Posted by AnFI

Punto
You are a diplomat.

i gave the quantification formulaically but it got modded out along with various other answers and of course my opinion of what Crab has added to the debate.
someone else can take the thought forward if they feel like it
It is not possible to continue to illuminate this subject fairly with the deliberate harassment and the support for that from the 'house', sorry to anyone who was interested.

Despite assertions otherwise from AnFI, the 'house' has no dog in this fight and there is no support for the harassment that has been coming from both sides of the discussion. House rules, however, apply to all contributors here and have been applied to more than one Rotorhead who have crossed the line in posting unacceptable content.

If the lack of overt support for either side of the discussion is seen as taking sides by AnFI, that is an incorrect assumption and continuing to post critical comments about PPRuNe moderating will achieve little in the way of promoting a point of view.

[Black Fly]

Pilot Error Theory

The principles of energy management are extremely important to a pilot maneuvering a helicopter close to the ground. The term “energy is life” is often used to emphasize the importance of energy management. Energy management is simply an exchange of potential energy and kinetic energy. Simply described as relates a helicopter return-to-target maneuver; potential energy is the energy of altitude while kinetic energy is airspeed. Energy is critical to survival and the safe execution of the maneuver. Helicopter pilots understand that potential and kinetic energy can be exchanged and that the sum of the aircraft energy must be managed to fly a return-to-target, wing-over, hammerhead, or split-s type of manoeuvre successfully.

The Greek pilot flyng in the video simply mismanaged potential and kinetic energy. The maneuver was performed too low to gain enough airspeed during descent for a low power recovery. The maneuver recovery was attempted too late to use power to prevent impact with the surface of the water. No power loss, control failure, or complex aerodynamic theories are necessary to explain the disastrous outcome of this poorly performed manoeuvre.