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For questions about those devices that swing forwards and downwards from the leading edge of an aircraft's wings, allowing them to produce more lift without stalling. Questions about high-lift devices in general should use "high-lift-devices" instead.

5 votes

What effect do slats have on descent rate?

If the slats would increase L/D, they would not be retracted in cruise. … If thrust and speed are not changed, deploying slats will increase sink speed. …
Peter Kämpf's user avatar
13 votes
Accepted

What is this tiny slat for?

The wing-root fairing makes a small triangular segment necessary; outboard of it slats are used. The item 2 is a NACA inlet for cabin air, as commented by @mins. …
Peter Kämpf's user avatar
3 votes
Accepted

What would be the effect of skinning over the gap in fixed leading-edge slats?

To answer your question, I suggest to look at the effect of slats. …
Peter Kämpf's user avatar
45 votes
Accepted

Why didn't the Concorde have flaps or slats?

Why no slats? Slats are helpful for delaying flow separation to higher angles of attack and allow a wing to create more lift. … With Concorde B, a span increase and the addition of variable leading edge droop (no slats!) were proposed. …
Peter Kämpf's user avatar
2 votes

How to calculate the lift coefficient of a multi element airfoil?

It depends. Are the c$_l$ values referenced to the local chord? Then you need to convert them to the chord of the full airfoil so they can be added. I wonder, however, how you can have individual lif …
Peter Kämpf's user avatar
3 votes
Accepted

Would adding a slat and a slotted flap increase the max CL of a multi element airfoil to 6.5?

Would that be several slats and flaps in sequence? …
Peter Kämpf's user avatar