(Required) Black hole departure.

[corethatthermal]

There is a phenomeum when you continue to rotate on climb-out, the inner ear fluid movement causes you to think you are in a steepening climb and you nose down too much to compensate. Please elaborate, those who know what i am talkin about

[goingnowherefast]

There's a difference between VFR and VMC.

[EPR]

There is a phenomeum when you continue to rotate on climb-out, the inner ear fluid movement causes you to think you are in a steepening climb and you nose down too much to compensate. Please elaborate, those who know what i am talkin about

The phenomenon you are referring to is called "Somatogravic Illusion", it's a vestibular illusion created during high acceleration/deccelerations without clear visual references..such as taking-off into the abyss at night/IFR and climbing initially only to allow the illusion to have you relax the control column and slowly pitch over into CFIT.

[Eric Janson]

Somatogravic Illusion

More reading here:-

http://aviationknowledge.wikidot.com/av ... c-illusion

https://www.skybrary.aero/index.php/Som ... _Illusions

https://en.wikipedia.org/wiki/Sensory_i ... n_aviation

[corethatthermal]

Thanks guys ! Like vertigo, this phenomenon needs to be experienced in conditions where it has the most effect and that is a black hole departure.

[rookiepilot]

I just found it interesting three similar accidents happened, all somewhat experienced pilots, (certainly one of them, by anyone's standards)

We can get hung up on the terms "black hole" instead......

[goingnowherefast]

While we're on semantics, black hole departure would get physicist all bent out of shape.

[Squaretail]

From reading the responses in this thread one thing that maybe is not apparent to the new pilot is that almost all night take offs have - with maybe the exception of the brightest full moon nights or take offs from the brightest of urban centres - a certain degree of “black hole ness”. Or a variety of other factors that may contribute to a less than ideal means of visual orientation after leaving the runway lights behind. Most airports tend to be at least surrounded by a buffer of clear unlit terrain, over which one may not have an immediate clear horizon reference out the window immediately after rotation, and the initial climb away from the runway. A lack of sufficient reference is typical even up to 200’ above the surface.

While the experienced here assume the obvious - the hazards of such a departure can be largely mitigated by treating said departure as an instrument one - that’s not immediately obvious to the neophyte, or the unwary, as they line up at the end of the runway. If I was to stress to anyone who would listen, night take offs are far more hazardous than they appear, and perhaps deserve more attention, especially in training and initial ventures into the dark. I suspect this trap catches more often the somewhat experienced who have become complacent. It’s just another VFR take off, until it isn’t.

In my personal experience, this has caught way more “experienced” pilots than I would like. Be careful out there.

[photofly]

In case anyone feels they've stumbled on a great untold secret of flying at night, law requires (405.14) night rating training to be given in accordance with the Flight Instructor Guide, and this is all included there:

Take-off
Objective
The student will learn how to take off at night under varied conditions with and without the use of the landing light.

Motivation
Different visual references during the take-off, and the lack of references during the initial climb, impose special demands on the pilot when taking off at night.

Essential Background Knowledge
(...
(4) Explain that instrument references may be required after take-off.
(5) Explain the importance of maintaining a positive rate of climb after take-off.
(6) Explain illusion of linear acceleration (pitch-up illusion) and black hole illusion.
...

So if you end up with a night rating and not understanding that you may need to use instruments from take-off, then something has gone wrong in training.