Quote:
Originally Posted by Crumpp
To deliver spark to an engines combustion chamber, we use a "spark plug"! Does it plug up the spark? NO, it is just the name of the device used to provide an ignition source.
When we design a spin resistant airplane, we use anti-spin devices to build that spin resistance.
Because folks do not understand the technical terminology, which I been nice enough to explain which is unfortunately lost in the zeal to prove me wrong by a small select portion, the community ends up with all these pointy-tin foil hat theories that have nothing to do with the spin resistant design of the Bf-109.
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As highlighted by my example of the K21 glider, which you can easily check, it is possible to have an aircraft that cannot spin but can stall.
There is of course a world of difference between a spin and a stall. The leading edge slats delay the stall and give the pilot greater control resulting in an aircraft that is more difficult to spin.
The leading edge slats DO NOT STOP THE AIRCRAFT FROM SPINNING.
When teaching the stall I used to
fully stall the glider then encourage the student to do what they liked with the controls for a few seconds and nothing would happen. Soon gravity would take over the nose would drop and authority is regained.
The period where the controls have no authority is very brief. One of the most dangerous events in a glider is a cable break on a winch launch at a low altitude say 100ft. The forces on the glider tend to 'throw' the nose up and without immediate action, its possible to be almost vertical with no momentum. As a result a serious quite probably fatal accident is basically certain. Students are taught that as soon as the cable breaks to immediately push the stick forward to its max before releasing what is left of the cable from the glider.
I mention this as it shows the controls are effective for all but a few seconds while the wing is fully stalled. However swift action when there is any airflow over the wings normally stops this happening. Even if the wing does fully stall and the conrols lose their effectiveness, then the momentum gained in the immediate actions prior to losing authority ensure a safe recovery.
In normal parlance an Anti Spin device is one that makes the recovery from a spin easier such as an anti spin strake, or a recovery parachute. They don't stop the aircraft spinning, they help with recovery.
Something that helps the aircraft maintain control such as a leading edge slat help delay the stall. again the two are not the same.
Which brings us back to the question which you refuse to reply to in simple terms.
Do you tell your students that the leading edge slats:-
a) That they delay the stall or
b) That they are anti spin devices.
Delaying a stall is not an anti spin device unless it helps the recovery from a spin.
Which brings me to a second question. Why does someone who says that they are a CFI need to be told something as basic as this?
PS don't try to impress by including a copy of a licence. I can understand not wanting your licence no or name to be broadcast, but why delete the expiry date when its only recently been issued?