What is stall strip? in the airplane?

Question

is this same as stall warning horn?

hmm...

Answer 1

The stall strip is attached span wise to the wing leading edge. At higher AOAs, that sharp leading edge protrudes into the flow on its way to the top of the wing, causing flow separation and loss of lift downstream of the strip. This might sound like a contradiction, because VGs( Vortex generators) also cause turbulent flow. The VGs create little tornadoes that are parallelto the wing upper surface.

Visualize the vortex created by a VG as a helical airflow—a cone of swirling air lying on its side, with the tip of the cone attached to the VG. Those swirls bring high-energy air down close to the wing’s upper surface, helping to keep the flow attached and delaying flow separation.

Another reason for locating the stall strips inboard is to cause a more pronounced stall warning. If the strips are placed correctly, the turbulent air they trigger impinges on the

horizontal tail. You feel this in the form of airframe or control stick buffeting. Of course, to take advantage of this feature requires a particular geometric relationship between the

wing and the horizontal tail. In some airplanes this buffeting occurs naturally without the need for strips. In others, like some T-tails, the horizontal tail would remain above the turbulent flow whether or not stall strips are installed

Answer 2

Here is a good explanation I ripped off from the source below, which I think summarizes the first two questions:

Stall strips are small v-shaped pieces of metal attached to the leading edge of the wing.

At high angles of attack the stall strip disrupts the boundary layer causing the affected portion of the wing to stall.

Some aircraft, such as Mooneys, are designed with a stall strip near the root of each wing. This causes a portion of the wing to stall several degrees before the rest of the wing. The resulting turbulent airflow strikes the tail causing a buffet which warns the pilot s/he is too close to the stall.

Other aircraft have stall strips on only one wing. In this case the stall strip is being employed to bring an asymmetric stall characteristic back into symmetry.

Answer 3

A stall strip is when a female student pilot starts slowly removing her clothes during a checkride to buy time while she figures out how to answer a question or do a maneuver.

Answer 4

A stall strip is a small piece of material, usually aluminum, triangular in cross section, attached to the wing’s leading edge, usually at the wing root. Its role is to alter the wing’s stall characteristics to ensure that the wing root stalls before the wing tips.

Answer 5

The first answer is good. I would like to add also, stall wedges can be mistaken for stall strips...Stall wedges also modify the stall characteristics of a wing...In some planes, you can reach a stall with little or no airframe buffet..Beech Bonanzas are notorious for this...you will see these on the outer portion of the wing on some of these planes..and they can't be missed...anyway, these things will make the airframe buffet to warn you of an imminent stall that otherwise may not have been recognized until the actual break...hope this helps a little

Jonathan S

ATP-LRJET,HS-125

CFI/AGI