Dynamic stall discussion

[Skoshi Tiger]

Aircraft can do loops and depending on how much energy and or power and or altitude you have on hand you can do multiple loops one after the other as long as your angle of attack does not exceed the stall angle. (ie you still have to fly the aircraft within it's flight envelope)

I expect this would effect the 'going vertical' manuvers where the pilot just yanks back on the stick and expects all their aircrafts energy to be converted to height or violent break turns.

I found (what i thought) reasonable description of a dynamic stall at
http://psasir.upm.edu.my/3610/1/An_E..._Inception.pdf

When an aerofoil is pitched through and beyond the incidence of static stall at a
sufficiently high pitch rate, the resulting series of events is often termed dynamic stall.
It is characterised by a significant lift overshoot, followed by a sudden loss of lift and a
major surge in pitching moment. Carr, (1977),

Interesting reading.

cheers!

[ACE-OF-ACES]

Originally Posted by Insuber

This series of funny statements illustrates perfectly how ignorance tries stubbornly to rule the knowledge.

No don't be so hard onyourself! I realise you were un-able to explain the difference which is why I ask you for the link in the russian forum

Originally Posted by Insuber

Dynamic stall is a violent phenomenon, leading to a huge loss of speed / energy.

Ah good so you agree with me and the link I posted a few pages back, i.e.

Advanced Topics in Aerodynamics

Where it defines a dynamics stall as..

Dynamic stall is a phenomenon that affects airfoils, wings and rotors in unsteady flows. It is due to changes, periodic or not, in the inflow conditions and/or angle of attack. In some cases, such helicopter rotors in advancing flight, dynamic stall is intrinsic to their state of operation.

Originally Posted by Insuber

Just for sake of simplicity: pull strongly the stick at high speed in real life, even in straight flight, and you will stall. In this game you can pull strongly the stick at high speed, and your plane climbs. The flight envelope is false.

What your forgeting is there is a chance that CoD does simulates stick inputs the same way IL-2 did.. Where the stick input is not a position offset as much as a force input.. That is to say just because you move the still all the way 'back' does not mean your elevator moved all the way 'up'.. What is actully going on is when you move your stick all the way ack, your have appled the max force input.. Thus if your max force input is limited to 20lb and due to the airspeed it would require 60lb to fully deflect the elevator.. Well you can see your not going to fully deflect the elevator

Originally Posted by Insuber

So: big need to simulate the dynamic stall, in my educated opinion.

And your welcome to it! S!