Good thread,
A lot of people comming out through the system don't question what they have been thought, or what they read in books, they then go on to teach what they were been thought and add in there own redundancy to be extra cautious, and the cycle continues, until before you know it, a whole generation of people think that helicopters are just slow moving airplanes.
Pedal turns, must always be done to the left (or right in European helicopters)
Is another load of B.S I have noticed from people comming out of large schools.
zxcvbn
can you explain number 1 please? are you saying it can happen at < 300ft per min descent?
May aswell open a can of worms and try and answer this.
Personally when I am demonstrating this on a flat calm day in a piston engine helicopter, it takes at least 500fpm ROD indicated, before I get the oscillations, pitching, rolling and sluggish cyclic response associated with VRS, bearing in mind that the air around the static port will be turbulent and there is also a delay on the VSI, I would assume that the ROD is nearer to 800 fpm, on a windy day it will obviously be greater, more often then not it is very very difficult to demonstrate VRS in a Robbie or huges 300 and what some people consider VRS is actually just pilot induced autorotation!
But I would never tell a PPL student that, for fear of luring them into a false sense of security, I am guilty of using the 30 30 30 system to make it easy to remember.
30% power applied
>300 fpm ROD
(500fpm is greater then 300 so its not really a lie!)
<30Kts of airspeed